超载对X52管线钢疲劳裂纹扩展的影响  

Effect of Overload on Fatigue Crack Propagation of the X52 Pipeline Steel

作　　者：范玉然[1] 陈迎锋[1] 路民旭[1] 

机构地区：[1]北京科技大学腐蚀与防护中心,北京100083

出　　处：《科学技术与工程》2007年第9期2045-2049,共5页Science Technology and Engineering

摘　　要：试验研究了裂纹扩展过程中超载载荷迟滞效应。在恒定的应力比下,在不同强度因子幅下通过计算过载影响区大小来确定影响区内的迟滞裂纹扩展速率,并与无超载情况下的裂纹扩展速率相比较,定性地说明X52管线钢裂纹扩展中的迟滞效应。The hysteresis that was induced by overload was investigated experimentally. In the constant stress ratio the retarded crack growth rate were counted by counting overload affected zone size under variational stress intensity range. And the hysteresis of the X52 pipeline steel was explained qualitatively by compared with crack growth rate without overload.

关 键 词：疲劳裂纹扩展 过载影响区 迟滞效应 

分 类 号：TG113.255[金属学及工艺—物理冶金] U177[金属学及工艺—金属学]