On the mechanism of quench cracking in Rene 95 nickel-based superalloy

被引:13
作者
Kane, WM [1 ]
Krupp, U
Jacobs, T
McMahon, CJ
机构
[1] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[2] Univ Siegen, Inst Werkstofftech, D-57068 Siegen, Germany
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 402卷 / 1-2期
关键词
Rene; 95; quench cracking; dynamic embrittlement; nickel plating;
D O I
10.1016/j.msea.2005.05.032
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The mechanism of quench cracking in the nickel-based superalloy Rene 95 has been investigated. Rapid cooling of notched tensile bars loaded with fixed grips was used to mimic a quench. Failures occurred by brittle intergranular fracture in air, but by 'rupture and at higher stress in vacuum. The brittle intergranular fracture in air was recognized as dynamic embrittlement. Nickel-plating of sufficient thickness was found to eliminate cracking when Rene 95 was water-quenched from above the gamma' solvus temperature. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:42 / 46
页数:5
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