利用MTS 810型疲劳试验机,采用轴向应变控制的方法,研究了应变比对2.25Cr1MoV钢高温(455 ℃)低周疲劳行为的影响。结果表明:在455 ℃下,2.25Cr1MoV钢呈现明显的循环软化特性;应变比不改变该钢的循环软化特性,但会产生初始平均应力,平均应力在寿命初期阶段随着循环周次增加急剧降低,并趋为0;应变比不改变疲劳裂纹的萌生方式,且对迟滞环的形状和大小没有影响;对称循环和非对称循环的低周疲劳寿命基本一致。
所属栏目
材料性能及其应用国家自然科学基金资助项目(51435012);教育部博士点基金资助项目(20130032110018)
收稿日期
2014/9/182015/7/7
作者单位
田阳:天津大学化工学院,天津 300072
陈巍峰:天津大学化工学院,天津 300072
赵姿贞:天津大学化工学院,天津 300072
陈旭:天津大学化工学院,天津 300072
备注
田阳(1988-),男,河南南阳人,硕士研究生。
引用该论文:
TIAN Yang,CHEN Wei-feng,ZHAO Zi-zhen,CHEN Xu.Effect of Strain Ratio on Low Cycle Fatigue Behavior of 2.25Cr1MoV Steel at High Temperature[J].Materials for mechancial engineering,2015,39(11):83~87
田阳,陈巍峰,赵姿贞,陈旭.应变比对2.25Cr1MoV钢高温低周疲劳行为的影响[J].机械工程材料,2015,39(11):83~87
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