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  4. 连续柱状晶组织铜及铜合金的超延展变形行为与塑性提高机制

中国有色金属学报, 2011, 21(10): 2324-2336.

连续柱状晶组织铜及铜合金的超延展变形行为与塑性提高机制

谢建新 1, , 王宇 2, , 黄海友 3,

1.北京科技大学 材料先进制备技术教育部重点实验室,北京100083

2.北京科技大学 材料先进制备技术教育部重点实验室,北京100083

3.北京科技大学 材料先进制备技术教育部重点实验室,北京100083

基金项目:   国家重点基础研究发展计划资助项目(2011 CB606300)  

关键词： 连续柱状晶组织 , 室温超延展性 , 塑性提升 , 变形机制 , 织构 , 晶界 , 组织演化

Extreme plastic extensibility and ductility improvement mechanisms of continuous columnar-grained copper and copper alloys

以本文作者所在课题组近年来的工作为基础,介绍了高性能连续柱状晶组织纯铜的室温超延展性、热交换用连续柱状晶组织BFe10-1-1管材的高塑性以及高弹高导Cu- 12％Al(质量分数)合金的室温塑性提升.研究发现,连续柱状晶组织的高取向性、平直的低能小角晶界以及在强塑性变形过程中高组分的<001>“软”取向织构及不同于普通多晶组织的动态回复、组织演化特征,是其塑性提升、具有超延展变形能力的主要原因,总结了连续柱状晶组织塑性提高与超延展变形性的相关机制.研究结果为改善材料尤其是脆性材料和难加工材料的室温塑性与可加工性能提供了理论依据和新思路.

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