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Ⅲ型过载对调质钢Ⅰ型疲劳裂纹扩展门槛的影响 被引量：1

Effects of Mode Ⅲ Overload on Mode Ⅰ Fatigue Crack Propagation Threshold of Quenching and Tempering Steel
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摘要 研究了不同参数的Ⅲ型过载对近门槛区调质 40Cr钢Ⅰ型疲劳门槛的影响。结果表明 :过载后疲劳门槛均会提高 ,其程度随过载比的加大而增加 ;过载次数的有限增多也会使疲劳门槛略有增加 ,但效果将逐渐趋于饱和。 The effect of Mode Ⅲ overload with different parameters on Mode Ⅰ fatigue threshold was investigated for Ouenching-Tempering 40Cr steel in the near-threshold region.The results show that,Mode Ⅲ overloading is followed higher Mode Ⅰ fatigue threshold,higher overloding ratio accompanied higher fatigue threshold.Fatigue threshold.Fatigue threshold increases slightly,but is saturated gradually with increasing limitedly overload cycles.The main mechanisms of overload effects are crack closure induced by wake zone plasticity and residual compressive stress around of the crack-tip.
作者 王章忠 杜百平 李年
机构地区 南京工程学院材料工程系 西安交通大学金属材料强度国家重点实验室
出处 《材料科学与工程学报》 CAS CSCD 北大核心 2003年第2期251-254,共4页 Journal of Materials Science and Engineering
关键词 调质钢 Ⅰ型疲劳裂纹扩展 Ⅲ型过载 疲劳裂纹扩展 疲劳门槛 Mode Ⅲ overloading fatigue crack propagation fatigue threshold
分类号 TG142.12 [金属学及工艺—金属材料]
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参考文献7

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二级参考文献3

同被引文献17

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材料科学与工程学报
2003年 第2期

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