EFFECTS OF STRESS RATIO AND FREQUENCY ON CORROSION FATIGUE CRACK GROWTH MECHANISM IN LOW ALLOY STEELS

被引：0
|
作者：
HAN Enhou HAN KYumei ZHENG Yuli KE Wei Corrosion Science Laboratory
机构：
来源：
Acta Metallurgica Sinica(English Edition) | 1993年 / 06期
关键词：
corrosion fatigue; stress ratio; crack growth; electrode potential; steel ZG20SiMn; steel SM50B-Zc;
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摘要：
Based on theoretical analysis about local strain,strain rate and dissolving rate at crack tip,the corrosion fatigue crack growth rate of steels ZG20SiMn and SM50B-Zc in fresh waterand 3.5% NaCl solution were measured experimentally,and the PH and electrode potentialwithin crack were also measured continuously along with crack propagating.It showed thatthe increase of crack growth rate,caused by both decreasing frequency and raising stressratio,was mainly accelerated by hydrogen embrittlement.
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页码：373 / 378
页数：6
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