摘要
研究了面心立方金属１Ｃｒ１８Ｎｉ９Ｔｉ和密排六方金属Ｚｒ４在非比例复合加载过程中宏观应力响应和微观变形机理．结果表明：两种材料在非比例加载过程中均表现为周期性软化、硬化特征．层错能较低的立方金属和轴比小于１６３３的密排六方金属，在塑性变形过程中均表现为平面状滑移特征；而在非比例加载过程中，随着最大外加切应力平面的旋转，塑性变形方式从平面状向波纹状转化，使得材料对加载历史比较敏感．
Macroscopic stress response and microscopic examination of f.c.c. lCrl8Ni9Ti and h.c.p. Zircaloy 4 under non proportional biaxial loading are made.The results show that periodic softening and subsequent hardening are displayed in both materials. Microscopic analysis indicates that in plane slipping occurs for cubic and hexagonal metals, the former with a lower stacking fault energy. Plastic deformation modes for lCrl8Ni9Ti and Zr 4 change from in plane slippage to wave slippage under biaxial non proportional loading due to the rotation of maximum shearing stress plane. Results show the dependence of loading history .
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1998年第12期66-69,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金
核工业科学基金
关键词
非比例加载
潜在硬化
锆合金
铬镍钛合金
non proportional loading latent hardening microscopic mechanism
