Creep behavior of MAR-M 302 Co-base superalloy

被引：4
|
作者：
Aghaie-Khafri, M. [1 ]
Binesh, B. [1 ]
机构：
[1] KN Toosi Univ Technol, Fac Mech Engn, Tehran, Iran
来源：
JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 15期
关键词：
MECHANICAL-PROPERTIES; HEAT-TREATMENT; AL STEEL; RUPTURE; FATIGUE; STRESS; ALLOY;
D O I：
10.1007/s10853-010-4471-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
MAR-M 302 a Co-base superalloy is currently used for nozzle guide vanes and stator blades in military and commercial aircraft-turbine engines. These components are usually operated at 1073-1273 K. In this study, the uniaxial constant load creep behavior of MAR-M 302 superalloy over temperature range of 1088-1198 K and stress range of 155-321 MPa was investigated. Concerning creep as thermally activated phenomenon, the investigated alloy followed empirical equation (epsilon) over dot = A sigma(n) exp (-Q/RT)with n values ranging mainly from 7 to 10. The mean apparent activation energy was calculated as 525 +/- 29 kJ/mol. The correlation between rupture life and creep characteristics was studied by different prediction methods that are based on the iso-stress lines and those relating the secondary or steady state creep rate to rupture life.
引用
收藏
页码：3990 / 3997
页数：8
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