Effect of Preweld Heat Treatment on the Microstructure of Heat-Affected Zone (HAZ) and Weldability of Inconel 939 Superalloy

被引：33
|
作者：
Gonzalez Albarran, M. A. [1 ]
Martinez, D. I. [2 ]
Diaz, E. [3 ]
Diaz, J. C. [1 ]
Guzman, I. [2 ]
Saucedo, E. [3 ]
Guzman, A. Ma. [2 ]
机构：
[1] Corp Mexicana Invest Mat SA CV COMIMSA, Saltillo 25295, Coah, Mexico
[2] UANL, FIME, San Nicolas De Los Garza 66451, NL, Mexico
[3] CIQA, Saltillo 25253, Coah, Mexico
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2014年 / 23卷 / 04期
关键词：
cracking; lattice misfit; microstructure; superalloy; strain; weldability; NICKEL-BASE SUPERALLOY; CREEP DEFORMATION; CRACKING; DISLOCATION; EVOLUTION; MISMATCH;
D O I：
10.1007/s11665-013-0704-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of two preweld heat treatments on the final microstructure of a heat-affected zone (HAZ) and its effect on the weldability of the superalloy Inconel 939 have been analyzed. The HAZ cracking related to the mechanical driving force criteria during the cooling cycle was directly influenced by the strain state at this zone. Heat treatments result in the formation of (1) irregular gamma' precipitates (more negative misfits) which showed higher strain (high density of interfacial dislocations) and (2) spherical precipitates (near-zero misfits) which as a result of their structure improve weldability by reducing weld HAZ cracking considerably.
引用
收藏
页码：1125 / 1130
页数：6
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