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Superalloy

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
.... , Hu Z.Q. : Formation of carbides and their effects on stress rupture of a Ni-base single crystal superalloy . Mater. Sci. Eng. A 361 , 191 – 197 ( 2003 ) 10.1016/S0921-5093(03)00517-3 7. Reed R.C. , Cox D.C. , Rae C.M.F. : Damage accumulation during creep deformation...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001311
EISBN: 978-1-62708-215-0
... in.) by the combined attack; in the tubes that leaked, of course, the combined attack reduced the wall thickness to the point of breakthough at the weld/base metal interfaces. Electroetched in oxalic acid. 49.4× Abstract Several nickel-base superalloy (UNS N06600) welded heat-exchanger tubes used...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
... and (b) inner root area of 700ES Abstract An investigation was conducted to better understand the time-dependent degradation of thermal barrier coated superalloy components in gas turbines. First-stage vanes are normally subjected to the highest gas velocities and temperatures during operation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... Abstract This article presents a failure analysis of 37.5 mW gas turbine third stage buckets made of Udimet 500 superalloy. The buckets experienced repetitive integral tip shroud fractures assisted by a low temperature (type II) hot corrosion. A detailed analysis was carried out on elements...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... products Rotor blade shrouds Steam turbines Superalloy High-temperature corrosion and oxidation Introduction During the course of a substantial routine inspection of a large turbine from an oil-fired generating station in Maritime Canada in 1977, and then again in 1979, a substantial deposit...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046972
EISBN: 978-1-62708-217-4
... metal. It was also determined that directionally solidified blades could minimize thermal fatigue cracking by eliminating intersection of grain boundaries with the surface. However, this improvement would be more costly than applying a protective coating. Airfoils Turbine blades Superalloy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... Abstract The circumstances surrounding the in-service failure of a cast Ni-base superalloy (Alloy 713LC) second stage turbine blade and a cast and coated Co-base superalloy (MAR-M302) first stage air-cooled vane in two turbine engines used for marine application are described. An overview...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
.... : An overview of Na 2 SO 4 and/or V 2 O 5 induced hot corrosion of Fe- and Ni-based superalloys . Rev. Adv. Mater. Sci . 16 , 27 – 50 ( 2007 ) 4. Eliaz N. , Shemesh G. , Latanision R.M. : Hot corrosion in gas turbine components . Eng. Fail. Anal . 9 , 31 ( 2002 ) 10.1016/S1350...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
.... The article discusses metallurgical instabilities of steel-based alloys and nickel-base superalloys. It provides information on several life assessment methods, namely, the life fraction rule, parameter-based assessments, the thermal-mechanical fatigue, coating evaluations, hardness testing, microstructural...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... coatings that improve performance of superalloy. diffusion gas turbines high-temperature coatings high-temperature corrosion interdiffusion oxidation superalloys WHEN CORROSION FAILURES OCCUR at high temperatures (300 to 1700 °C, or 570 to 3090 °F), the unscheduled outages result in loss...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001357
EISBN: 978-1-62708-215-0
...-base superalloy comparable to Udimet 500, Udimet 710, or Rene 77. Typical protective coatings were not found. Test results further showed that the fuel used was not adequate to guarantee the operating life of the blades due to excess sulfur trioxide, carbon, and sodium in the combustion gases, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091761
EISBN: 978-1-62708-229-7
... Abstract Turbine buckets in a 37.5-MW gas turbine made of Udimet 500 superalloy failed in service. The power plant was located 1 km (0.6 miles) from the Pacific Ocean and operated on No. 2 diesel fuel, which was supplied by tanker ship. Turbine bucket failures occurred on three units after 2500...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... is the absolute temperature. Figure 2 provides insight into the effect of temperature on inelastic deformation accumulation. The images are of the external surface of nickel-base superalloy test specimens. Both specimens were monotonically tested to an identical inelastic strain. One specimen was tested at room...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
.... An attempt is thus made to determine the optimum cladding parameters for the materials of interest. References References 1. Kohl H.K. , Peng K. : Thermal stability of the superalloys Inconel 625 and Nimonic 86 . J. Nucl. Mater . 101 , 243 – 250 ( 1981 ) 10.1016/0022-3115(81)90166...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... of stainless steel. (c) Intergranular fracture of a superalloy. (d) Scanning electron microscope image of intergranular fracture. (e) Scanning electron microscope image of cleavage In a metallographic section, these two types of crack-propagation modes can be identified easily after etching...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... 1150 2100 4 405, 410 705 1300 4 416 675 1245 4 420 620 1150 4 430 815 1500 4 440 760 1400 4 442 980 1795 4 446 1095 2005 4 Superalloys N-155 iron-base superalloy 1040 1900 1 S-816 cobalt-base superalloy 980 1800 1...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001328
EISBN: 978-1-62708-215-0
.... “Superalloys,” Metals Handbook, Desk Edition American Society for Metals , Metals Park, OH , 1985 , p 16 – 13 . Selected Reference Selected Reference • Lampman S. , Intergranular Fracture , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 641...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047621
EISBN: 978-1-62708-229-7
..., and flange and more skillful welding techniques to avoid undercutting and unfused interfaces. Arc welding Combustion chamber Flanges Gas turbine engines Pipe fitting Undercuts Welding defects Inconel 718 (Nickel-base superalloy) UNS N07718 Fatigue fracture Joining-related failures...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... and power turbines and, in some cases, the aft-most stages of the compressor. Therefore, creep-resistant nickel and cobalt-base superalloys are typically used for components in these high-temperature regions of the gas turbine. There are multiple mechanisms by which creep manifests in a material...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090181
EISBN: 978-1-62708-229-7
...-base superalloy Fatigue fracture Metalworking-related failures This case history builds on the cracked gas turbine blades shown in Fig. 1 , 2 , 3 . Cracking was found to initiate from a mechanism of LCF. Low-cycle fatigue is induced during thermal loading cycles in gas turbines (each cycle...