Temperature and strain-rate effects on low-cycle fatigue behavior of alloy 800H

被引：36
|
作者：
Rao, KBS [1 ]
Schiffers, H [1 ]
Schuster, H [1 ]
Halford, GR [1 ]
机构：
[1] INST MAT ENERGY SYST,MECH TESTING LAB,D-52428 JULICH,GERMANY
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1996年 / 27卷 / 02期
关键词：
D O I：
10.1007/BF02648404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of strain rate (4 X 10(-6) to 4 X 10(-3) s(-1)) and temperature on the low-cycle fatigue (LCF) behavior of alloy 800H have been evaluated in the range 750 degrees C to 950 degrees C. Total axial strain controlled LCF tests were conducted in air at a strain amplitude of +/-0.30 pet. Low-cycle fatigue life decreased with decreasing strain rate and increasing temperature. The cyclic stress response behavior showed a marked variation with temperature and strain rate. The time- and temperature-dependent processes which influence the cyclic stress response and life have been identified and their relative importance assessed. Dynamic strain aging, time-dependent deformation, precipitation of parallel platelets of M(23)C(6) on grain boundaries and incoherent ledges of twins, and oxidation were found to operate depending on the test conditions. The largest effect on life was shown by oxidation processes.
引用
收藏
页码：255 / 267
页数：13
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