High Cycle Fatigue Damage Mechanisms of MAR-M 247 Superalloy at High Temperatures

被引：18
|
作者：
Smid, M. [1 ,2 ]
Hornik, V. [1 ,3 ]
Hutar, P. [1 ]
Hrbacek, K. [4 ]
Kunz, L. [1 ]
机构：
[1] Acad Sci Czech Republic, Inst Phys Mat, Brno 61662, Czech Republic
[2] CEITEC IPM, Brno 61662, Czech Republic
[3] Brno Univ Technol, Tech 2, Brno 61669, Czech Republic
[4] Prvni Brnenska Strojirna Velka Bites As, Velka Bites 59512, Czech Republic
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2016年 / 69卷 / 02期
关键词：
High cycle fatigue; S-N curves; Fractography; High temperature; EBSD analysis; ELEVATED-TEMPERATURES; BASE SUPERALLOY; MAR-M247; BEHAVIOR; LC;
D O I：
10.1007/s12666-015-0817-0
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
High cycle fatigue tests of the MAR-M 247 superalloy under constant load were conducted with the aim to determine S-N curves at temperatures 650, 800, 900 and 950 A degrees C. It has been found that the slope of the S-N curves reflects changes of the cyclic deformation mechanism with temperature. At temperatures 650 and partly at 800 A degrees C, fatigue crack propagation exhibits crystallographic character (propagation along the {111} system) in early stages of the fatigue life. The crystallographic mode of the fatigue crack propagation was found to disappear at temperatures 900 and 950 A degrees C.
引用
收藏
页码：393 / 397
页数：5
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