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

被引：20

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

页码：393 / 397

页数：5

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