热轧+电脉冲处理对超导用Cu-14Sn-0.3Ti合金组织及性能的影响  

Effect of Hot Rolling+Electric Pulse on Microstructure and Properties of Cu-14Sn-0.3Ti Alloy for Superconducting

作　　者：王宇轩 邹军涛 冯巧丽 白云飞 程军胜[2] 石林 宋大拙 孙利星 姜伊辉 张志伟 Wang Yuxuan;Zou Juntao;Feng Qiaoli;Bai Yunfei;Cheng Junsheng;Shi Lin;Song Dazhuo;Sun Lixing;Jiang Yihui;Zhang Zhiwei(Engineering Research Center of Conducting Materials and Composite Technology,Ministry of Education,Shaanxi Key Laboratory of Electrical Materials and Infiltration Technology,School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]西安理工大学材料科学与工程学院陕西省电工材料与熔(浸)渗技术重点实验室导电材料与复合技术教育部工程研究中心,陕西西安710048 [2]中国科学院电工研究所,北京100190

出　　处：《稀有金属材料与工程》2024年第4期1155-1162,共8页Rare Metal Materials and Engineering

基　　金：国家重点研发计划(2022YFB3804000);国家自然科学基金(52071259,52104385);陕西省科学技术研究计划(2020zdzx04-04-01,2021GY-216);陕西省政府教育厅科学研究计划(20JY050)。

摘　　要：采用热轧+电脉冲处理的方式实现了Cu-14Sn-0.3Ti合金强度与延伸率的协同提升,Cu-14Sn-0.3Ti合金在经过70%热轧+10 min电脉冲处理后,延伸率由4.7%提升至40%,强度由298 MPa提升至530 MPa。通过调控热轧及电脉冲处理工艺,研究了形变储能,脉冲电流对减少层错,促进孪晶生长的影响。结果表明,Cu-14Sn-0.3Ti合金的强度与密度随着形变储能的增加而提升。在焦耳热和电子风力的共同作用下,Cu-14Sn-0.3Ti合金组织中的δ相发生溶解,层错减少。电脉冲处理后孪晶的形成为位错的运动提供了额外的滑移系,提升了Cu-14Sn-0.3Ti合金的延伸率。一方面孪晶的出现对晶粒进行了分割,细化了晶粒,另一方面,孪晶界的产生阻碍了Cu-14Sn-0.3Ti合金形变时位错的运动,使得Cu-14Sn-0.3Ti合金的强度得到提升。The strength and elongation of Cu-14Sn-0.3Ti alloy were improved synergistically by hot rolling+electric pulse treatment.The influence of deformation energy storage and pulse current on reduction of stacking faults and twin growth was investigated by adjusting hot rolling and electric pulse processing.The results show that the elongation of Cu-14Sn-0.3Ti alloy increases from 4.7%to 40%,and the strength increases from 298 MPa to 530 MPa after 70%hot rolling+10 min electric pulse treatment.The strength and density of Cu-14Sn-0.3Ti alloy increase with the increase in deformation energy storage.Theδphase dissolves,and the deformation-induced stacking faults are reduced because of the synergetic effect of Joule heat and electron wind.After electric pulse treatment,the formation of twins provides additional slip systems for the movement of dislocations and improves the elongation of Cu-14Sn-0.3Ti alloy.On the one hand,the appearance of twins divides and refines the grains.On the other hand,the formation of twin boundaries hinders the movement of dislocations during the deformation of Cu-14Sn-0.3Ti alloy,improving the strength of Cu-14Sn-0.3Ti alloy.

关 键 词：Cu-14Sn-0.3Ti合金 热轧 电脉冲处理 强度 延伸率 

分 类 号：TM263[一般工业技术—材料科学与工程]