由于变形过程中产生应变诱发马氏体相变, 亚稳奥氏体不锈钢低温下硬化曲线呈S形. 在每隔1.5%的工程应变小区间利用Hollomon公式求得硬化指数n, 发现n值不是常数. 而且n值和硬化率随应变的增加呈抛物线形变化, n值随着应变率的增高相应的减小.
The hardening curve exhibits sigmoid shape in metastable austenite stainless steel at low temperature due to strain induced martensite transformation during deformation. The hardening exponent n values derived from Hollomon equation in each 1.5% of nominal strain are found not to be constant. Furthermore, both the n values and the hardening rate present parabola with increase of strain, while n values decrease correspondingly with increase of strain rate.
参考文献
| [1] | Hu Zhizhong;Cao Shuzhen .[J].西安交通大学学报,1993,27(06):71-76. |
| [2] | Deng Zengjie;Zhou Jingen.工程材料的断裂与疲劳[M].北京:机械工业出版社,1995:20-178. |
| [3] | Tang Changguo;Zhu Jinhua et al.[J].金属学报(英文版),1994,7(03):183-186. |
| [4] | Olson G B;Cohen M .[J].Metallurgical and Materials Transactions,1975,6A:791-795. |
| [5] | Mangonon P L;Thomas G .The Martensite Phases in 304 Stainless Steel[J].Metallurgical and Materials Transactions,1970,1:1577-1586,and1587-1594. |
| [6] | Murr L E;Staudhammer K P;Hecker S S .[J].Trans,1982,13A:627-635. |
| [7] | 张旺峰,陈瑜眉,朱金华.一种新型的拉伸应力应变曲线规律研究[J].西安交通大学学报,1999(10):64-67. |
| [8] | Dieter G E.Mechanical Metallurgy[M].McGraw-Hill Press,1976:333. |
| [9] | Tomota Y;Tamura I .[J].Transactions ISIJ,1982,22:665-677. |
| [10] | Olson G B;Azrin M .[J].Metallurgical and Materials Transactions,1978,9A(09):713-721. |
| [11] | Huang Mingzhi;Luo Jingxi;He Baoping .[J].金属学报,1983,19(04):A291-299. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%