| 亚稳态材料的应变硬化曲线与硬化参量 |
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| 引用本文： | 张旺峰,陈瑜眉,朱金华.亚稳态材料的应变硬化曲线与硬化参量[J].中国有色金属学报,2000(Z1). |
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| 作者姓名： | 张旺峰 陈瑜眉 朱金华 |
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| 作者单位： | 西安交通大学金属材料强度国家重点实验室!西安710049 |
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| 基金项目： | 国家自然科学基金!资助项目 ( 59771 0 4 8) |
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| 摘 要： | 亚稳态奥氏体不锈钢低温拉伸时 ,由于存在应变诱发马氏体相变 ,硬化曲线呈S形。在工程应力应变曲线上每隔 1 .5%的应变区间利用Hollomon关系 ,发现硬化指数n随着应变率的增大而相应减小 ;且硬化指数n和硬化率dσ/dε随着应变的增加呈抛物线形变化。因此 ,稳定材料中关于n的一系列规律均不适用。
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| 关 键 词： | 硬化曲线 硬化指数 硬化率 亚稳态材料 |
Strain hardening curve and parameters of metastable materials |
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| ZHANG Wang feng,CHEN Yu mei,ZHU Jin hua.Strain hardening curve and parameters of metastable materials[J].The Chinese Journal of Nonferrous Metals,2000(Z1). |
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| Authors: | ZHANG Wang feng CHEN Yu mei ZHU Jin hua |
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| Abstract: | The hardening curve exhibits sigmoid in metastable austenite stainless steel at low temperature due to strain induced martensite transformation during deformation. The values of hardening exponent, n , derived from Hollomon equation in each 1.5% of nominal curve are found not to be a constant, n values decrease correspondingly with increase of strain rate. Furthermore, both the n values and the hardening rate present parabola with increasing strain. So the relationships of n applied in stable materials can not be applied in metastable ones. |
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| Keywords: | hardening curve hardening exponent hardening rate metastable materials |
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