Effect of nickel-based filler metal types on creep properties of dissimilar metal welds between Inconel 617B and 10% Cr martensitic steel

被引：16
作者：
Zhang, Yu [1 ,2 ]
Hu, Mengjia [3 ]
Cai, Zhipeng [1 ,2 ,4 ,5 ]
Han, Chaoyu [1 ,2 ]
Li, Xiaogang [1 ,2 ]
Huo, Xin [6 ]
Fan, Manjie [6 ]
Rui, Shaoshi [1 ,2 ]
Li, Kejian [1 ,2 ]
Pan, Jiluan [1 ,2 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
[2] Minist Educ, Key Lab Adv Mat Proc Technol, Beijing 100084, Peoples R China
[3] Tsinghua Univ, Inst Nucl Energy Technol, Beijing 100084, Peoples R China
[4] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China
[5] Tsinghua Univ, Collaborat Innovat Ctr Adv Nucl Energy Technol, Beijing 100084, Peoples R China
[6] Shanghai Turbine Plant Shanghai Elect Power Gener, Shanghai 200240, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2021年 / 14卷
基金：
中国国家自然科学基金;
关键词：
Martensitic steel; Nickel-based alloy; Creep; Dissimilar metal weld; Creep strength compatibility; HIGH-TEMPERATURE PERFORMANCE; TRANSITION JOINTS; MICROSTRUCTURE EVOLUTION; IV CRACKING; STAINLESS-STEEL; POWER-PLANTS; BEHAVIOR; FAILURE; FRACTURE; STRESS;
D O I：
10.1016/j.jmrt.2021.07.131
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Creep rupture behaviors of dissimilar metal welds (DMWs) between Inconel 617B and 10% Cr martensitic steel with two different filler metals Inconel 617 and 82 were comparatively investigated at 600 degrees C to study the effect of nickel-based filler metal types on creep properties. Both the crept DMWs ruptured on the steel side prematurely compared to steel base metal (BM). The failure mode of DMW shifts from interfacial failure at weld metal (WM)/ steel interface to Type IV crack in the intercritical heat-affected zone (ICHAZ) of steel with longer rupture life at the same creep condition by replacing Inconel 617 filler metal with Inconel 82. Type IV crack was related to matrix softening and fine prior austenite grain boundaries (PAGBs) scarcely decorated by precipitates in the ICHAZ. Interfacial failure was controlled by creep voids nucleation, growth and coalescence at the interface, while oxide notch only triggered crack initiation. The failure mode shift is because Inconel 82 filler metal compared to Inconel 617 can achieve slighter creep deformation concentration in the HAZ closely adjacent to interface and avoid interfacial failure of the DMW due to the lower creep strength gradient across the interface it induced. Based on this study, creep strength compatibility should be considered when selecting nickel-based filler metals for similar DMWs to obtain prolonged creep life. (C) 2021 The Author(s). Published by Elsevier B.V.
引用
收藏
页码：2289 / 2301
页数：13
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