316L钢室温和中温环境下应力控制的低周疲劳行为研究  

INVESTIGATION ABOUT LOW CYCLE FATIGUE BEHAVIOR OF 316L STEEL AT ROOM AND ELEVATED TEMPERATURE

作　　者：陈凌[1] 蒋家羚[1] 

机构地区：[1]浙江大学化工机械研究所,杭州310027

出　　处：《机械强度》2005年第1期121-125,共5页Journal of Mechanical Strength

基　　金：国家十五攻关项目 (2 0 0 1BA80 3B0 30 6)~~

摘　　要：通过对 3 16L钢在室温和中温环境下应力控制的低周疲劳试验 ,得到若干有意义的试验结果 ,揭示和分析3 16L钢室温和中温环境下应力循环特性及棘轮行为随加载历史、加载名义应力范围和环境温度的变化规律 ,并在此基础上讨论动态应变时效 (dynamicstrainaging ,DSA)的现象。研究表明 ,材料的应力循环特性依赖于温度和加载历史 ,棘轮行为依赖于温度、加载水平和加载历史 ,42By low cycle fatigue (LCF) experimentation of 316L steel under stress control at room and elevated temperature, some significant results have been obtained. The effects of histories, cyclic stress range and temperature on the cyclic deformation behavior and ratcheting were analyzed. Based on this investigation, the dynamic strain aging (DSA) phenomenon was also discussed. The results show that cyclic stress property depends on the temperature and loading history, ratcheting is determined by the temperature, loading state and loading history, and the dynamic strain aging is remarkable at 420°C.

关 键 词：316L钢 低周疲劳 棘轮行为 动态应变时效 

分 类 号：O346.2[理学—固体力学] TG142.71[理学—力学]