摘要
研究了A537钢在3.5%NaCl水溶液中阴极极化与阳极极化条件下加载波型对疲劳裂纹扩展速率的影响并研究了相应电位条件下应变电极的电化学响应规律,结果表明,在外加电位为-800mV(SCE)以上时阳极溶解机制起主导作用,在-800mV以下时氢脆机制起主导作用,在阳极极化条件下,持续应变型加载波型的影响主要体现于低△K范围,而在阴极极化条件下,其影响体现于高△K范围。
Influences of applied potentials and loading waveform on the fatigue crackgrowth for steel A537 in 3.5%NaCl solution, and corresponding straining electrode behaviourhave been studied. Under the applied potentials over or below-800 mV (SCE), the anodicdissolution or the hydrogen embrittlement is predominant, respectively. For applied anodicpotential, the acceleration effect of continuous loading pattern on the CF crack growth main-ly appeared at the range of low △K values, while for cathodic potential, it appeared at therange of high △K values. The continuous straining causes a decrease of natural potential andan increase of anodic dissolution current.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第6期B274-B279,共6页
Acta Metallurgica Sinica
基金
国家教委基金
辽宁省科委的基金
关键词
腐蚀疲劳
A537钢
波型
电位
裂纹
corrosion fatigue
steel A537
waveform
potential
straining electrode
