METHOD FOR EXPERIMENTAL INVESTIGATION OF THE EFFECT OF SHORT-TERM OVERLOADS ON THE CRACK RESISTANCE OF THE METAL OF HOUSING PARTS OF STEAM-TURBINES UNDER CREEP CONDITIONS

被引：0
|
作者：
GLADSHTEIN, VI
机构：
来源：
INDUSTRIAL LABORATORY | 1995年 / 61卷 / 04期
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中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
An experimental method for quantitative evaluation of the variation of metal crack resistance under creep conditions due to the action of periodic short-term overloads at a relatively low temperature that simulate the main temperature-power working conditions of the metal of thick-walled turbine housings is described. Taking as an example 15Kh1M1FL cast steel, it is shown that compressive overloads under creep conditions have, as a rule, a negative effect on the time to the onset of crack growth but hardly influence subsequent crack propagation. Periodical tensile overloads, on the other hand, can retard fracture.
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页码：223 / 228
页数：6
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