Microstructure and its effect on high temperature tensile properties of T92/HR3C dissimilar weld joints

Wang, Qibing; Xin, Ruishan; Wang, Zhichun; Han, Zhewen; Jiao, Xiangdong; Kang, Ju

doi:10.1016/j.jmapro.2022.08.046

Cited by 10 publications

(1 citation statement)

References 31 publications

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“…Sah et al [14] analysed the HT tensile test along with creep rupture tests on similar weld samples of diffusion-welded Alloy 617 plates at seven different temperatures ranging from 100 • C to 950 • C. Zang et al [15] investigated the tensile properties of 9CrMo steel at room temperature, 400 • C, and 550 • C to better understand grain elongation during tensile tests and optimize the composition of 9CrMo steel. Wang et al [16] observed serrated behaviour in the graph during HT tensile tests at 640 • C for the filler ERNiCr-3 GTAW joint of P92 and HR3C. The recrystallization and precipitation of Cr 23 C 6 carbides were likely responsible for the serrated behaviour.…”

Section: Introductionmentioning

confidence: 96%

High-Temperature Tensile Behaviour of GTAW Joints of P92 Steel and Alloy 617 for Two Different Fillers

Kumar,

Sirohi,

Pandey

et al. 2023

Materials

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This study explores the high-temperature (HT) tensile rupture characteristics of a dissimilar gas-tungsten-arc-welded (GTAW) joint between P92 steel and Alloy 617, fabricated using ER62S-B9 and ERNiCrCoMo-1 fillers. The high-temperature tensile tests were performed at elevated temperatures of 550 °C and 650 °C. An optical microscope (OM) and a field emission scanning electron microscope (FESEM) were utilized to characterize the joint. The high-temperature test results indicated that the specimen failed at the P92 base metal/intercritical heat-affected zone (ICHAZ) rather than the weld metal for the ERNiCrCoMo-1(IN617) filler. This finding confirmed the suitability of the joint for use in the Indian advanced ultra-supercritical (A-USC) program. The fracture surface morphology and presence of precipitates were analysed using an SEM equipped with energy dispersive spectroscopy (EDS). The appearance of the dimples and voids confirmed that both welded fillers underwent ductile–dominant fracture. EDS analysis revealed the presence of Cr-rich M23C6 phases, which was confirmed on the fracture surface of the ER62S-B9 weld (P92-weld). The hardness plot was analysed both in the as-welded condition and after the fracture.

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Section: Introductionmentioning

confidence: 96%