| 金属材料在循环载荷下塑性变形传播对疲劳性能的影响 |
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| 引用本文： | 冯忠信,张建中,杨建军,陈新增.金属材料在循环载荷下塑性变形传播对疲劳性能的影响[J].金属学报,1996,32(3):261-264. |
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| 作者姓名： | 冯忠信 张建中 杨建军 陈新增 |
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| 作者单位： | 西安交通大学，宁波高等专科学校 |
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| 摘 要： | 对疲劳裂纹萌生寿命和扩展速率的研究表明，４０Ｃｒ钢调质和正火态存在加载频率效应，而１Ｃｒ１８Ｎｉ９Ｔｉ钢固溶处理态未发现加载频率效应。引起加载频率效应的实质是，随加载频率不断提高，金属材料塑性变形传播速度不断减小，从而改变塑性区特性。
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| 关 键 词： | 塑性变形 传播 残余应力 金属材料 疲劳性能 |
| 收稿时间： | 1996-03-18 |
| 修稿时间： | 1996-03-18 |
EFFECT OF PLASTIC DEFORMATION PROPAGATION ON FATIGUE BEHAVIOUR OF METALS UNDER CYCLIC LOADING |
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| FENG Zhongxin, ZHANG Jianzhong, YANG Jianjun, CHEN Xinzeng Xi'an Jiaotong University,Xi'an Ningbo College,Ningbo.EFFECT OF PLASTIC DEFORMATION PROPAGATION ON FATIGUE BEHAVIOUR OF METALS UNDER CYCLIC LOADING[J].Acta Metallurgica Sinica,1996,32(3):261-264. |
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| Authors: | FENG Zhongxin ZHANG Jianzhong YANG Jianjun CHEN Xinzeng Xi'an Jiaotong University Xi'an Ningbo College Ningbo |
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| Affiliation: | FENG Zhongxin, ZHANG Jianzhong, YANG Jianjun, CHEN Xinzeng 1)Xi'an Jiaotong University,Xi'an 710049 2) Ningbo College,Ningbo 315010 |
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| Abstract: | Studies of the fatigue crack initiation and propagation show that there is the loading frequency effect for the quenched and tempered or normalized 40Cr steel, but no the loading frequency effect for the solution treated ICr18Ni9Ti. The essential reason that causes the loading frequency effect is due to decrease in the plastic deformation propagation speed with the inereasing loading frequency. The decrease in plastic strain amplitude and the increase in residual compressive stress play a main role for the delaying fatigue crack initiation and the retarding crack propagation. The study of the loading frequency effect on the fatigue behaviour of the metals with the lower plastic deformation propagation speed possesses important engineering signification. |
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| Keywords: | fatigue crack initiation fatigue crack propagation loading frequency plastic deformation propagation residual stress |
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