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

Xiaogang Li; Kejian Li; Shanlin Li; Yao Wu; Zhipeng Cai; Jiluan Pan

doi:10.1016/j.jmst.2019.07.021

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

Xiaogang Li
, Kejian Li
, Shanlin Li
, Yao Wu
, Zhipeng Cai^*
, Jiluan Pan

^*此作品的通讯作者

Tsinghua University

科研成果: 期刊稿件 › 文章 › 同行评审

21 引用（Scopus）

摘要

In the present study, the microstructure, fracture toughness, and fracture behavior of Inconel 617B narrow gap tungsten inert gas (NG-TIG) welded joint were investigated systematically at the designed service temperature of 700 °C. Fracture toughness (J_0.2) of base metal (BM) and heat affected zone (HAZ) was higher than that of weld metal (WM). In HAZ and BM, strain mainly localised 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.

源语言	英语
页（从-至）	173-182
页数	10
期刊	Journal of Materials Science and Technology
卷	39
DOI	https://doi.org/10.1016/j.jmst.2019.07.021
出版状态	已出版 - 15 2月 2020
已对外发布	是

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title = "Microstructure and high temperature fracture toughness of NG-TIG welded Inconel 617B superalloy",

abstract = "In the present study, the microstructure, fracture toughness, and fracture behavior of Inconel 617B narrow gap tungsten inert gas (NG-TIG) welded joint were investigated systematically at the designed service temperature of 700 °C. Fracture toughness (J0.2) of base metal (BM) and heat affected zone (HAZ) was higher than that of weld metal (WM). In HAZ and BM, strain mainly localised 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.",

keywords = "Fracture behavior, Microstructure, Misorientation, Nickel alloys, Welding",

author = "Xiaogang Li and Kejian Li and Shanlin Li and Yao Wu and Zhipeng Cai and Jiluan Pan",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = feb,

day = "15",

doi = "10.1016/j.jmst.2019.07.021",

language = "英语",

volume = "39",

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TY - JOUR

T1 - Microstructure and high temperature fracture toughness of NG-TIG welded Inconel 617B superalloy

AU - Li, Xiaogang

AU - Li, Kejian

AU - Li, Shanlin

AU - Wu, Yao

AU - Cai, Zhipeng

AU - Pan, Jiluan

PY - 2020/2/15

Y1 - 2020/2/15

N2 - In the present study, the microstructure, fracture toughness, and fracture behavior of Inconel 617B narrow gap tungsten inert gas (NG-TIG) welded joint were investigated systematically at the designed service temperature of 700 °C. Fracture toughness (J0.2) of base metal (BM) and heat affected zone (HAZ) was higher than that of weld metal (WM). In HAZ and BM, strain mainly localised 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.

AB - In the present study, the microstructure, fracture toughness, and fracture behavior of Inconel 617B narrow gap tungsten inert gas (NG-TIG) welded joint were investigated systematically at the designed service temperature of 700 °C. Fracture toughness (J0.2) of base metal (BM) and heat affected zone (HAZ) was higher than that of weld metal (WM). In HAZ and BM, strain mainly localised 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.

KW - Fracture behavior

KW - Microstructure

KW - Misorientation

KW - Nickel alloys

KW - Welding

UR - https://www.scopus.com/pages/publications/85076991601

U2 - 10.1016/j.jmst.2019.07.021

DO - 10.1016/j.jmst.2019.07.021

M3 - 文章

AN - SCOPUS:85076991601

SN - 1005-0302

VL - 39

SP - 173

EP - 182

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

ER -

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

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