INTERACTION OF HIGH CYCLE FATIGUE WITH HIGH-TEMPERATURE CREEP IN 2 CREEP-RESISTANT STEELS

被引：22
|
作者：
LUKAS, P
KUNZ, L
SKLENICKA, V
机构：
[1] Institute of Physical Metallurgy, Czechoslovak Academy of Sciences, Brno
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1990年 / 129卷 / 02期
关键词：
D O I：
10.1016/0921-5093(90)90272-5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The interaction of high cycle fatigue with high temperature creep was studied in bainitic steel of the type 2.25 Cr1Mo (pressure vessel steel) at 600 °C and in austenitic steel of the type AISI 304 at 700 °C. The cyclic stress component strongly affects both the minimum creep rate and the time to fracture. For a constant maximum stress in the stress cycle, σmax, the creep rate and the time to fracture depend on the stress ratio R = σmin/σmax in a non-monotonous way. From the practical point of view it is important that even small vibrations superimposed on the static load increase the time to fracture substantially. The explanation of the effect of the cyclic stress component on the deformation processes is based on a composite model of dislocation structure. © 1990.
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页码：249 / 255
页数：7
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