Microstructure and high temperature fracture toughness of NG-TIG welded Inconel 617B superalloy

被引：1

作者：

Xiaogang Li ^{[1
]}

Kejian Li ^{[1
]}

Shanlin Li ^{[1
]}

Yao Wu ^{[2
]}

Zhipeng Cai ^{[1
,3
,4
]}

Jiluan Pan ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Tsinghua University

[2] Tsinghua University Research Institute for Advanced Equipment

[3] State Key Laboratory of Tribology, Tsinghua University

[4] Collaborative Innovation Center of Advanced Nuclear Energy Technology, Tsinghua University

来源：

Journal of Materials Science & Technology | 2020年 / 39卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Nickel alloys; Welding; Fracture behavior; Microstructure; Misorientation;

D O I：

暂无

中图分类号：

TG132.3 [特种热性质合金];

学科分类号：

080502 ;

摘要：

In the present study, the microstructure, fracture toughness, and fracture behavior of Inconel 617 B narrow gap tungsten inert gas(NG-TIG) welded joint were investigated systematically at the designed service temperature of 700℃. Fracture toughness(J) of base metal(BM) and heat affected zone(HAZ) was higher than that of weld metal(WM). In HAZ and BM, strain mainly loc alised at grain boundaries with large misorientation and there were lots of coincidence site lattice(CSL)∑3 boundaries related to twins inside grains, which led to the much higher fracture toughness of BM and HAZ than WM. The high numbers of twins as well as the less serious strain localization at grain boundaries resulted in the most outstanding fracture toughness of BM.

引用

页码：173 / 182

页数：10

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