ECAP对纯铝拉伸性能和断裂行为影响的研究

1.内蒙古工业大学,材料学院,呼和浩特,010051

2.内蒙古工业大学,材料学院,呼和浩特,010051

3.内蒙古工业大学,材料学院,呼和浩特,010051

4.内蒙古工业大学,材料学院,呼和浩特,010051

5.中核北方核燃料有限公司,内蒙古,包头,014035

基金项目: 内蒙古自治区高等学校科学研究项目(NJO5046) 国家自然科学基金(10562003)

Investigation of Effect of Tensile Property and Fracture Behavior of Pure Aluminum during ECAP

利用等通道转角挤压(ECAP)对纯铝进行了连续的挤压,结合位错及断口形貌,分析了位错强化及断裂机制.结果表明, 剪切变形使位错滑移,晶粒细化,挤压4道次后材料屈服强度、抗拉强度分别较初始态提高了38.5%和24.0%,断裂机制呈现典型的沿晶断裂特征.

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