Liquation Cracking in Linear Friction Welded Directionally Cast Alloy 247

被引：0
|
作者：
Neidel, A. [1 ]
Giller, M. [1 ]
Riesenbeck, S. [1 ]
机构：
[1] Siemens Energy, Gasturbinenwerk Berlin, Werkstoffpruflab, Huttenstr 12, D-10548 Berlin, Germany
来源：
PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY | 2022年 / 59卷 / 10期
关键词：
Alloy; 247; nickel base superalloy; directionally solidified investment casting; translatory friction welding; hot cracking sensitivity;
D O I：
10.1515/pm-2022-0059
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Linear Friction Welding (LFW) is a rarely used joining technology. To test the suitability of this solid-state process for hot cracking-sensitive nickel base superalloys, tests were performed using conventionally and directionally cast slabs of Alloy 247. Since LFW does not involve melting of the weld flanks, there were some expectations that this special welding technique could overcome the poor weldability of Alloy 247. However, all tested specimens failed by liquation cracking (LC) within the Weld Center Zone (WCZ) at the directionally cast side.
引用
收藏
页码：641 / 651
页数：11
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