Effect of Post Weld Heat Treatment on Cryogenic Mechanical Properties of Electron Beam Welded Cast Inconel 718

被引：12

作者：

Bae, Sang-Hyun ^{[1
]}

Kwon, Soon-Il ^{[1
]}

Yoon, Joong-Geun ^{[1
]}

Lee, Je-Hyun ^{[2
]}

Do, Jeong-Hyeon ^{[2
]}

Kim, In-Soo ^{[2
]}

Choi, Baig-Gyu ^{[2
]}

Jo, Chang-Yong ^{[2
]}

Hong, Hyun-Uk ^{[1
]}

机构：

[1] Changwon Natl Univ, Dept Mat Sci & Engn, Chang Won 641773, Gyeongnam, South Korea

[2] Korea Inst Mat Sci, High Temp Mat Res Grp, Chang Won 641831, Gyeongnam, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2014年 / 45A卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

MICROSTRUCTURE; SOLIDIFICATION; ALLOY-718; CRACKING;

D O I：

10.1007/s11661-013-2133-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron beam welding of pre-aged cast 718 produced a slender Laves phase, while welds from solutionized cast 718 exhibited a blocky Laves phase with an initial stage of delta precipitation and formation of gamma' + gamma '' strengtheners after post weld heat treatment (PWHT). The presence of primary strengthener and coarse Laves particles in PWHT weld may cause reduction of the micro-plastic zone ahead of a crack, leading to a significant decrease in Charpy impact toughness at 77 K (-196 degrees C). (C) The Minerals, Metals & Materials Society and ASM International 2013

引用

页码：537 / 542

页数：6

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