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cross-weld joints

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Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 939-950, October 11–14, 2016,
... in respect to the alloy additions and microstructure. The mechanical properties of the weld metals at ambient temperature are examined. Creep properties of both undiluted weld metals and cross-weld joints are examined through stress rupture test and the data are evaluated and compared with those of the base...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1109-1122, October 21–24, 2019,
... the filler materials had the smallest sub-grain structures. 1118 Figure 10: Macro hardness traverse for both X20 and P91 weld filler cross weld joints. Uniaxial tests Figure 11 illustrate creep curves (creep strain vs time) for cross weld samples that are consisted of creep aged X20 PM to X20 weld filler...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 530-553, August 31–September 3, 2010,
... temperature welded piping and headers around the world, the need to connect cross-weld data to weld joint design and assessment, and in general, the need to develop suitable guidelines for evaluating the strength of weldments relative to that of base metal. continuum damage mechanics headers high...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 607-614, October 22–25, 2013,
... Abstract In order to clarify the effect of stress state on microstructural changes during creep, the microstructure was observed in the central part of the cross section of the fine-grained heat-affected zone (FGHAZ) and in the surface region of the FGHAZ in Gr.92 steel welded joint. Creep...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 960-972, October 22–25, 2013,
... be presented based on the creep rupture data of the large size cross-weld specimens and component welds. creep degradation creep initiation creep life assessment fossil-fired power plants martensitic stainless steel steam temperature thermal efficiency weld joint influence factors welded metal...
Proceedings Papers

AM-EPRI2004, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Fourth International Conference, 788-802, October 25–28, 2004,
... loss and chemical composition of the consumables on the weld performance was studied. Short-term tensile and long-term creep tests on cross weld specimens were carried out in order to evaluate strength. The results obtained so far show that the properties of the welded joints are rather optimistic...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 951-961, October 11–14, 2016,
... Properties at Ambient Temperature Table 7 shows the results of cross tensile tests and Charpy V-notch tests at ambient temperature. Both tensile samples fractured outside the weld metal on the CB2 side. Table 7: Mechanical properties of dissimilar joints CB2-P92 at ambient temperature Filler metal UTS [MPa...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 667-678, October 22–25, 2013,
... of the cross-weld specimens made from the two joints are compared with each other as well as with those of the original pipe, i.e. BM A, as shown in Fig. 2. It can be seen that the two types of welded joints did not show a systematic difference between each other, both being weaker compared to the base metal...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 584-602, August 31–September 3, 2010,
... to develop a comprehensive database on the creep-fatigue behavior of Grade 92 steel's base metal and welded joints and to establish a suitable life estimation procedure. Key findings include: (i) a thick pipe with submerged arc welding (SAW) was manufactured for testing; (ii) base metal and cross-weld...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1069-1078, October 21–24, 2019,
... cool was carried out. The hardness and impact toughness of welded joints were measured, and the microstructure evolution after aging at 750℃ for 3000h was investigated by scanning electron microscopy(SEM). The results show that, during the aging process, the hardness of weld metal increases firstly...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 948-959, October 22–25, 2013,
... 5Co1 and the post-weld heat treatment (PWHT) was applied. A cross-section of the welded joint is shown in Fig. 1. The results of tensile and impact tests at room temperature are shown in Tab. 3. The rod-shaped specimens (6.4 mm in diameter and 25.6 mm gauge length) were used for creep tests. The cross...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 582-591, October 15–18, 2024,
... is shown in Fig. 2. Figure 2: The cross-sectional profile of the modified DMW with a weld cap To be convenient, the joint using a narrow gap weld groove with ER NiCrCoMo-1 filler metal will be referred to as Type I, and the joint using a narrow gap weld groove with ER NiCr-3 filler metal will be referred...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1123-1131, October 21–24, 2019,
... was on the qualification and adaptation of welding processes, especially for thick-walled structures. For example the investigations in [1] showed that an optimization of the welding consumables for welded joints made of Alloy 617 aimed to avoid melting losses was successfully applied. Cross weld creep tests indicated...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 423-435, August 31–September 3, 2010,
... steel are deferent. It is necessary to perform intermediate aging at 840°C after welding to get high temperature ductility, but this aging decreases the strength of 12%Cr ferritic steel. Welding materials for high-strength dissimilar joints were designed using the CALPHAD method to solve the problem...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 161-168, October 11–14, 2016,
... for purpose of the transition joint by structural integrity assessment, additional mechanical test data, beyond the scope of ASME IX weld procedure qualification, was required. The range of mechanical testing included creep stress rupture testing (parent and cross weld), stress relaxation, cyclic stress...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 640-653, August 31–September 3, 2010,
... temperatures around 600°C, due to the dissolution of finely dispersed V-rich nitrides and the precipitation of coarse particles of the modified Z-phase, [(Cr,V,Nb)N]. Secondly, welded joints of nearly all ferritic steel grades are prone to premature creep failures in the fine-grained heat-affected zone, known...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 690-701, October 22–25, 2013,
... was measured through the wall thickness. Fig. 1 shows a cross-sectional view of the intrados welded joint of the elbow and the areas in which the number density of creep voids was measured. The measurement results are given in Fig. 2. As indicated in Fig. 2, more creep voids were observed near the inner...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 931-938, October 11–14, 2016,
... Abstract Developed 9Cr-3W-3Co-Nd-B heat-resistant steel SAVE12AD (Recently designated as ASME Grade 93) pipes and tubes have higher creep strength in both base metal and welded joints than conventional high Cr ferritic steels such as ASME Grades 91, 92 and 122. The welded joints of SAVE12AD...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 1067-1076, August 31–September 3, 2010,
..., porosity or lack of fusion. 1069 Figure 3. Overview of the pipe after welding Figure 4(a) shows the macrostructure on the cross section of the weld joint. The multi-pass weld joint showed a good weld build-up layers without defects, and nearly parallel straight fusion lines. Hardness measurement...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1098-1108, October 21–24, 2019,
... Comparison of tensile properties between inner and outer surface 2.25Cr-1Mo base metal and weld metal The engineering stress-strain curves of 2.25Cr-1Mo base metal and cross-joint samples taken from the inner and outer walls are shown in Fig. 9. This study sample test temperature is 20 . There is no stress...