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International Conference on Advances in High-Temperature Materials
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Proceedings Papers
AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, iii-viii, October 21–24, 2019,
... Abstract Listings of the conference executive committee, international advisory board, and technical review committee for the 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials. International Conference on Advances in High-Temperature Materials...
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Listings of the conference executive committee, international advisory board, and technical review committee for the 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, xix-xx, October 22–25, 2013,
... Abstract Preface for the 2013 Advances in Materials Technology for Fossil Power Plants conference. International Conference on Advances in High-Temperature Materials Advances in Materials Technology for Fossil Power Plants Proceedings from the Seventh International Conference October...
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Preface for the 2013 Advances in Materials Technology for Fossil Power Plants conference.
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AM-EPRI2004, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Fourth International Conference, xxxvi-xxxvii, October 25–28, 2004,
... and universities to develop materials for even higher temperatures. Similar efforts have been underway in Japan. These are indeed exciting times for the materials community. EPRI has been holding an international conference on Advanced Materials Technology for Fossil Power Plants every three years. The previous...
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Preface for the 2004 Advances in Materials Technology for Fossil Power Plants conference.
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AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 65-71, August 31–September 3, 2010,
... understanding of plant materials Eliminate repeat failures, minimize equipment damage, and reduce outage frequency and duration by utilizing improved knowledge of damage mechanisms and life assessment methods Reduce failures from high-and low-temperature corrosion 66 Obtain in-depth knowledge of advanced...
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For four decades, the Electric Power Research Institute (EPRI) has led groundbreaking materials research in the power industry, yielding significant cost savings across fossil, nuclear, and power delivery sectors. This paper outlines EPRI's fossil-related research, conducted through three major programs: Fossil Materials&Repair (P87 Base program), Materials-Fossil&Nuclear strategic program, and a supplemental program addressing key industry initiatives. EPRI's research focuses on understanding damage mechanisms, developing improved materials, enhancing life prediction methodologies, and advancing component degradation assessment. The paper highlights the synergy between EPRI's short- and long-term research initiatives, referencing several presentations from the 6th International Conference on Advances in Materials Technology for Fossil Power Plants. By showcasing EPRI's comprehensive approach to materials research, this overview demonstrates the institute's ongoing commitment to advancing power generation technology and efficiency.
Proceedings Papers
AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, xv-xvi, August 31–September 3, 2010,
... 8), advanced stainless steels (Section 9), and weld performance (Section 10). The genesis of this conference and the reason for its success, even amidst a global recession and reduced energy demand, is the worldwide interest in advanced high-efficiency coal power plants. The abundance of coal...
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Preface for the 2010 Advances in Materials Technology for Fossil Power Plants conference.
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AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 41-52, October 22–25, 2013,
... 4, 2010. EPRI, March 2011: 1022300. Distributed by ASM International. 288-302. [25] W.R. Mohn, J.M. Tanzosh. Considerations in Fabricating USC Boiler Components from Advanced High Temperature Materials. Proceedings to the Fourth International Conference on Advances in Materials Technology...
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The United States Department of Energy (U.S. DOE) Office of Fossil Energy and the Ohio Coal Development Office (OCDO) have been the primary supporters of a U.S. effort to develop the materials technology necessary to build and operate an advanced-ultrasupercritical (A-USC) steam boiler and turbine with steam temperatures up to 760°C (1400°F). The program is made-up of two consortia representing the U.S. boiler and steam turbine manufacturers (Alstom, Babcock & Wilcox, Foster Wheeler, Riley Power, and GE Energy) and national laboratories (Oak Ridge National Laboratory and the National Energy Technology Laboratory) led by the Energy Industries of Ohio with the Electric Power Research Institute (EPRI) serving as the program technical lead. Over 10 years, the program has conducted extensive laboratory testing, shop fabrication studies, field corrosion tests, and design studies. Based on the successful development and deployment of materials as part of this program, the Coal Utilization Research Council (CURC) and EPRI roadmap has identified the need for further development of A-USC technology as the cornerstone of a host of fossil energy systems and CO 2 reduction strategies. This paper will present some of the key consortium successes and ongoing materials research in light of the next steps being developed to realize A-USC technology in the U.S. Key results include ASME Boiler and Pressure Vessel Code acceptance of Inconel 740/740H (CC2702), the operation of the world’s first 760°C (1400°F) steam corrosion test loop, and significant strides in turbine casting and forging activities. An example of how utilization of materials designed for 760°C (1400°F) can have advantages at 700°C (1300°F) will also be highlighted.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, iv-v, October 22–25, 2013,
... Abstract Listing of the international advisory board for the 2013 Advances in Materials Technology for Fossil Power Plants conference. International Conference on Advances in High-Temperature Materials Advances in Materials Technology for Fossil Power Plants Proceedings from...
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Listing of the international advisory board for the 2013 Advances in Materials Technology for Fossil Power Plants conference.
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AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 190-201, October 11–14, 2016,
... in succession in European Union, United States and Japan [1-3]. China also started the several research projects to develop the 700°C A-USC pulverized coal-fired power technology including the research on high temperature 190 materials and the construction of test facility and loops in 2010 [4...
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A new nickel-based superalloy, designated as GH750, was developed to meet the requirements of high temperature creep strength and corrosion resistance for superheater/reheater tube application of A-USC power plants at temperatures above 750°C. This paper introduces the design of chemical composition, the process performance of tube fabrication, microstructure and the properties of alloy GH750, including thermodynamic calculation, room temperature and high temperature tensile properties, stress rupture strength and thermal stability. The manufacturing performance of alloy GH750 is excellent and it is easy to forge, hot extrusion and cold rolling. The results of the property evaluation show that alloy GH750 exhibits high tensile strength and tensile ductility at room and high temperatures. The 760°C/100,000h creep rupture strength of this alloy is larger than 100MPa clearly. Microstructure observation indicates that the precipitates of GH750 consist of the precipitation strengthening phase γ’, carbides MC and M 23 C 6 and no harmful and brittle TCP phases were found in the specimens of GH750 after long term exposure at 700~850°C. It can be expected for this new nickel-based superalloy GH750 to be used as the candidate boiler tube materials of A-USC power plants in the future.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, iii, October 22–25, 2013,
... Abstract Listing of the organizing committee for the 2013 Advances in Materials Technology for Fossil Power Plants International Conference on Advances in High-Temperature Materials Advances in Materials Technology for Fossil Power Plants Proceedings from the Seventh International...
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Listing of the organizing committee for the 2013 Advances in Materials Technology for Fossil Power Plants
Proceedings Papers
AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 916-932, August 31–September 3, 2010,
... For Advanded USC Boiler, pp. 185196 in 5th International Conference on Advances in Materials Technology for Fossil Power Plants, ASM-International, Materials Park, OH (2008). 7. J.P. Shingledecker, R.W. Swindeman, Q. Wu, and V.K. Vasudevan, Creep Strength of High-Temperature Alloys for Ultrasupercritical...
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Advanced Ultra-supercritical (A-USC) steam power-plant technology is being developed for better efficiency and lower emissions at 700°C and above, but is based mainly on Ni-based alloys. The ability to include lower-cost alloys with appropriate high-temperature performance should have substantial technological and economic benefits. CF8C-Plus is a cast austenitic stainless steel recently developed for other applications at 600-900°C, which has creep-strength comparable to many solid-solution Ni-based alloys. EPRI and Carpenter Technology produced a 400 lb heat of CF8C-Plus steel and hot-forged it at 5:1 and 12:1 reductions, to assess feasibility of the alloy as a wrought advanced stainless steel for potential use as steam headers and piping for A-USC power plant applications. The hot-forged alloy has a recrystallized grain structure 6-9 times finer than the as-cast dendritic structure, resulting in better strength and impact resistance at room-temperature, and about 20% higher yield-strength (YS) at 760°C, and similar or better ductility compared to the as-cast material. The initial creep-rupture testing at 700-800°C for up to 2000h also indicates similar or better rupture resistance and better creep-ductility for wrought compared to cast material. The next steps needed to test performance of the wrought austenitic stainless steel for extruded headers and piping are discussed.
Proceedings Papers
AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1060-1068, October 21–24, 2019,
... composition gas tungsten arc welding microstructure nickel-base superalloys niobium scanning electron microscopy solidification titanium welded joints Joint EPRI 123HiMAT International Conference on Advances in High Temperature Materials October 21 24, 2019, Nagasaki, Japan J. Shingledecker, M...
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A new nickel-base superalloy GH750 has been developed as boiler tube of advanced ultrasupercritical (A-USC) power plants at temperatures about and above 750°C in China. This paper researched the weld solidification of GH750 filler metal, microstructure development and property of GH750 welded joint by gas tungsten arc weld. Liquid fraction and liquid composition variation under non-equilibrium state were calculated by thermo-dynamic calculation. The weld microstructure and the composition in the dendrite core and interdendritic region were analyzed by SEM(EDX) in detail. The investigated results show that there is an obvious segregation of precipitation-strengthening elements during the weld solidification. Titanium and Niobium are the major segregation elements and segregates in the interdendritic region. It was found that the changing tendency of the elements’ segregation distribution during the solidification of GH750 deposit metal is agree with the thermodynamic calculation results. Till to 3,000hrs’ long exposure at 750°C and 800°C, in comparison with the region of dendrite core of solidification microstructure, not only the coarsening and the accumulation of γʹ particles are remarkable in the interdendritic region, but also the small quantity of the blocky and needle like η phases from. The preliminary experimental results indicate that the weakening effect of creep-rupture property of the welded joint is not serious compared with GH750 itself.
Proceedings Papers
AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 386-392, August 31–September 3, 2010,
... to use higher strength Ni-base superalloys in addition to conventional heat-resistant steel. However, since the manufacturability of existing commercial Ni-base superalloys is not as good as that of heat-resistant steel, development of new materials with excellent manufacturability and high-temperature...
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A new Ni-base superalloy has been developed for Advanced Ultra Super Critical (A-USC) power plants operating above 750°C, targeting reduced CO 2 emissions through improved efficiency. While existing research focuses on 700°C-class materials, this study presents a novel alloy design for higher-temperature applications. Using the CALPHAD method, a prototype alloy (Ni-23Co-18Cr-8W-4Al-0.1C) was developed by eliminating Ti, Nb, and Ta to improve hot-workability while maintaining strength. The resulting alloy demonstrates twice the creep strength of Nimonic 263, with an estimated 10 5 h steam turbine creep resistance temperature of 780°C, marking a significant advancement in A-USC material capabilities.
Proceedings Papers
AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 246-252, October 21–24, 2019,
... heat treatment Laves phase microstructure Joint EPRI 123HiMAT International Conference on Advances in High Temperature Materials October 21 24, 2019, Nagasaki, Japan J. Shingledecker, M. Takeyama, editors httpsdoi.org/10.31339/asm.cp.am-epri-2019p0246 Copyright © 2019 ASM International® All...
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More efficient, sustainable, flexible and cost-effective energy technologies are strongly needed to fulfil the new challenges of the German “Energiewende”. For a reduction of consumed primary resources higher efficiency steam cycles with increased operating parameters, pressure and temperature, are mandatory. Hence, advanced materials are needed. The present study focuses on stainless, high strength, ferritic (non-martensitic) steel grades, regarding thermal treatment effects on particle evolution. The heat treatment includes variations, e.g. a two phase pre heat treatment. Effects of the treatment were analysed and connected to creep performance. Experiments at differently heat treated materials show promising improvement of creep performance. These results can be linked to the stability and evolution of strengthening Laves phase particles.
Proceedings Papers
AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 169-180, October 11–14, 2016,
... Abstract 23Cr-45Ni-7W alloy (HR6W) is a material being considered for use in the high temperature parts of A-USC boilers in Japan. In order to establish an assessment method of creep damage for welded components made using HR6W, two types of internal pressure creep tests were conducted. One...
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23Cr-45Ni-7W alloy (HR6W) is a material being considered for use in the high temperature parts of A-USC boilers in Japan. In order to establish an assessment method of creep damage for welded components made using HR6W, two types of internal pressure creep tests were conducted. One is for straight tubes including the circumferential weld and the other is for welded branch connections. The test results for the circumferential welds ensured that the creep rupture location within the area of the base metal, as well as the time of rupture, can be assessed by mean diameter hoop stress. On the other hand, the creep rupture area was observed in the weld metal of the branch connections, although the creep strength of Inconel filler metal 617 was higher than that of HR6W. FE analyses were conducted using individual creep strain rates of the base metal, the heat affected zone and the weld metal to clarify this difference in the failures of these two specimens. Significant stress was only produced in the weld metal as opposed to the base metal, due to the difference in creep strain rates between the welded branch connections and creep crack were initiated in the weld metal. The differences between the two failure types were assessed using the ductility exhaustion method.
Proceedings Papers
AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 436-449, August 31–September 3, 2010,
..., B. Donth and D. Bokelmann. High Chromium steel forgings for steam turbines at elevated temperatures. Energy Materials, 2007, p. 207 [3] N. Blaes, B. Donth and D. Bokelmann. High Chromium steel forgings for steam turbines at elevated temperatures. Marco Island, Florida: Fifth International Conference...
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In Europe and Japan, great efforts are currently being invested in the development of materials designed to increase the steam temperature in fossil power plants. In the steel segment, the COST program is concentrating on 10% Cr steels with the addition of boron with the aim of achieving a steam temperature of 650°C. With nickel-based materials, the goal is to achieve steam temperatures of 700°C and higher. Alloy 617 has proved to be a very promising candidate in this field and a modified version is currently being developed in Japan. Materials of this type are used in both the turbine and in parts of the boiler.
Proceedings Papers
AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 66-73, October 11–14, 2016,
... of the Piping Stress and Supports on Cracking of Tee Welds, Proc 8th International Conference on Advances in Materials Technology for Fossil Power Plants, Algarve, Portugal, Oct. 2016. [7] Ma H., Zheng F. P. et al, Failure Analysis of Welded Joint of Dissimilar Steel on the Inner Ring of High Temperature...
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Along with rapid development of thermal power industry in mainland China, problems in metal materials of fossil power units also change quickly. Through efforts, problems such as bursting due to steam side oxide scale exfoliation and blocking of boiler tubes, and finned tube weld cracking of low alloy steel water wall have been solved basically or greatly alleviated. However, with rapid promotion of capacity and parameters of fossil power units, some problems still occur occasionally or have not been properly solved, such as weld cracks of larger-dimension thick-wall components, and water wall high temperature corrosion after low-nitrogen combustion retrofitting.
Proceedings Papers
AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 924-930, October 11–14, 2016,
... in Materials Technology for Fossil Power Plants, ASM International, Ohio, 2013, pp. 765-776. [14] P.J. Ennis, et al., Implications of Steam Oxidation for the Service Life of High Strength Martensitic Steel Components in High Temperature Plant, Int. J. Pressure Vessels Piping, Vol. 84, No. 1-2, (2007), pp. 82...
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High efficiency in power generation is not only desirable because of economical reasons but also for enhanced environmental performance meaning reduced quantity of forming ash and emissions. In modern medium to large size plants, improvements require supercritical steam values. Furthermore, in future there will be an increasing share of renewables, such as wind and solar power, which will enhance the fluctuation of supply with the consequence that other power sources will have to compensate by operating in a more demanding cyclic or ramping mode. The next generation plant will need to operate at higher temperatures and pressure cycles coupled with demanding hot corrosion and oxidation environments. Such an operation will significantly influence the performance of materials used for boilers and heat exchanger components by accelerating oxidation rates and lowering mechanical properties like creep resistance. The paper discusses the oxidation behaviour of San25, 800H and alloy 263 in supercritical water at temperatures 650 and 700 °C at 250 bar, and compares the changes of mechanical properties of materials at these temperatures.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1313-1328, October 22–25, 2013,
..., Microstructural Degradation During High Temperature Exposure Up To 105 H And Its Effects On Creep Of Gr . 91 Steel Microstructural, in Sixth International Conference on Advances in Materials Technology for Fossil Power Plants, 2010, p. Paper S2B. [16] H. Hirata and K. Ogawa, Metallurgical investigation...
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9-12%Cr martensitic-ferritic steels continue to be developed for target temperatures of 650°C. This paper reviews the performance of two experimental European steels against the performance of the better known grade 92 alloy. It comments on the problem of type IV cracking and the effect of welding variables on cross-weld creep performance. Preliminary results from an on-going creep test programme are presented in context, and the findings compared with published data.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 190-201, October 22–25, 2013,
... Abstract In order to reduce CO 2 emissions and improve power generation efficiency, a development project involving an advanced USC (A-USC) plant has been carried out in Japan since 2008. Nibased alloys are candidate materials for boiler components with high temperature steam conditions, which...
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In order to reduce CO 2 emissions and improve power generation efficiency, a development project involving an advanced USC (A-USC) plant has been carried out in Japan since 2008. Nibased alloys are candidate materials for boiler components with high temperature steam conditions, which are much stronger than conventional heat resistant steel. However, Ni-based alloys have never been applied with respect to the high pressure parts and thick walled components of USC coal-fired power plants. In this study, therefore, fabrication and characteristic properties, such as weldability, the weld joint and bent part properties, and weld cracking susceptibilities of Ni-based alloys such as HR6W, HR35 and two types of Alloy617 (High B and Low B) pipes were evaluated. Additionally, two types of HR6W header mock-ups and a HR6W tube element mock-up were fabricated. With the exception of Alloy617 (High B), the fabrication trials of Ni-based alloy pipes were conducted successfully, and the long-term creep strength of weldments and bends of Ni-based alloy pipes were found to be nearly equivalent to those of base metal. In the case of Alloy617 (High B), hot cracking was observed.
Proceedings Papers
AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 468-481, October 22–25, 2013,
... The First International Conference on IMPROVED COAL-FIRED PLANTS, 1986, PP.8 [10] INCO Inc., 1977, Catalog, High Temperature High Strength Nickel Base Alloys, INCO Inc., New York. [11] R. Yamamoto, Y. Kadoya, H. Kawai, R. Magoshi, S. Ueta, T. Noda and S. Isobe, Alloy Design and Material Properties of Ni...
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Advanced 700°C-class steam turbines demand austenitic alloys for superior creep strength and oxidation resistance beyond 650°C, exceeding the capabilities of conventional ferritic 12Cr steels. However, austenitic alloys come with a higher coefficient of thermal expansion (CTE) compared to 12Cr steels. To ensure reliability, operability, and performance, these advanced turbine alloys require low CTE properties. Additionally, for welded components, minimizing CTE mismatch between the new material and the welded 12Cr steel is crucial to manage residual stress. This research investigates the impact of alloying elements on CTE, high-temperature strength, phase stability, and manufacturability. As a result, a new material, “LTES700R,” was developed specifically for steam turbine rotors. LTES700R boasts a lower CTE than both 2.25Cr steel and conventional superalloys. Additionally, its room-temperature proof strength approaches that of advanced 12Cr steel rotor materials, while its creep rupture strength around 700°C significantly surpasses that of 12Cr steel due to the strengthening effect of gamma-prime phase precipitates. To assess the manufacturability and properties of LTES700R, a medium-sized forging was produced as a trial run for a turbine rotor. The vacuum arc remelting process was employed to minimize segregation risk, and a forging procedure was meticulously designed using finite element method simulations. This trial production resulted in a successfully manufactured rotor with satisfactory quality confirmed through destructive evaluation.
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