On post-weld heat treatment cracking in tig welded superalloy ATI 718Plus

被引：8

作者：

Asala, G. ^{[1
]}

Ojo, O. A. ^{[1
]}

机构：

[1] Univ Manitoba, Winnipeg, MB R3T 5V6, Canada

来源：

RESULTS IN PHYSICS | 2016年 / 6卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Superalloy; Joining; Post-weld heat treatment; ALLVAC; 718PLUS;

D O I：

10.1016/j.rinp.2016.03.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The susceptibility of heat affected zone (HAZ) to cracking in Tungsten Inert Gas (TIG) welded Allvac 718Plus superalloy during post-weld heat treatment (PWHT) was studied. Contrary to the previously reported case of low heat input electron beam welded Allvac 718Plus, where HAZ cracking occurred during PWHT, the TIG welded alloy is crack-free after PWHT, notwithstanding the presence of similar micro-constituents that caused cracking in the low input weld. Accordingly, the formation of brittle HAZ intergranular micro-constituents may not be a sufficient factor to determine cracking propensity, the extent of heat input during welding may be another major factor that influences HAZ cracking during PWHT of the aerospace superalloy Allvac 718Plus. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：196 / 198

页数：3

共 12 条

[1] Repair welding of wrought superalloys: Alloy 718, Allvac 718Plus and Waspaloy [J].