郭廷彪,王晨,李琦,吴一博,唐兴昌.单晶铜在ECAP过程中的织构转变和强化行为[J].稀有金属材料与工程,2019,48(4):1065~1073.[guotingbiao,wangchen,liqi,wuyibo,tangxingchang.Texture evolution and strengthening behavior of single crystal copper during equal channel angular pressing[J].Rare Metal Materials and Engineering,2019,48(4):1065~1073.]
单晶铜在ECAP过程中的织构转变和强化行为
投稿时间:2017-11-16  修订日期:2018-04-12
中文关键词:  等通道转角挤压  电子背散射衍射  织构  单晶铜
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      由于优秀的导电性能,单晶铜已经在各个领域得到了广泛的应用。然而,较低的强度性能严重阻碍了其进一步的发展和使用。所以,使用ECAP技术对单晶铜进行强化,同时研究采用三个不同路径挤压时对材料性能的影响。使用电子背散射衍射和 X 射线衍射来对 6 道次 ECAP 变形过程中单晶铜的织构进行检测。模具的内角为 120°,挤压路径为 A、Bc、C。结果表明: 5 道次挤压后,A 路径,Bc路径和 C 路径的强度和延伸率分别为 405MPa 、30%,395 MPa、26.7%,385 MPa 、27.9%。6 道次挤压后,A 路径的织构为{112}<110>以及较弱的{110}<112>织构;Bc 路径为{001}<110>织构;而 C 路径的织构已经产生了分散。当采用 C 路径进行几道次的挤压后,首先在其极图中出现了双织构并存的情况,随后 A 路径极图中同样出现了双织构。而在 Bc 路径极图中,并没有其他的织构出现。在挤压过程中材料的导电性只有少量的下降,且全部在 98%IACS 以上。可以看出,在合适的应变量下,ECAP 可以使单晶铜强度明显提高而且导电性损失很小。同时,采用不同的挤压路径可以显著影响材料的性能,例如采用A路径挤压出的材料有最高的强度,C路径挤压出的材料有最好的导电性能。
Texture evolution and strengthening behavior of single crystal copper during equal channel angular pressing
英文关键词:engineering equal channel angular pressing  electron backscattered diffraction  texture  single crystal copper
英文摘要:
      Because of the excellent conductivity, single crystal copper has been widely used in many industrial fields. However, the lower strength has severely restricted its further development and application. So, ECAP was adopted in this study to reinforce the single crystal copper by route A/Bc/C and research the effect of different routes. The texture of single crystal copper during 6 passes ECAP with a die channel angle of 120°through the route A, route Bc and route C were investigated by electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). At the same time, the elongation and strength of the material were tested. The results show that after 5 passes, the tensile strength and elongation of route A, route Bc and route C is 405MPa with 30%, 395 MPa with 26.7% and 385 MPa with 27.9%, respectively. After 6 passes, the texture of route A is {112}<110> and weaker {110}<112> texture, route Bc is{001}<110>, texture of route C is dispersed. In the pole figure of the samples ECAPed by route C, double texture structure firstly appeared, the next is route A. There is no other texture appeared in the pole figure by the route Bc. Meanwhile, the conductivity of the material is just had a small decrease, and all of them are above 98% IACS. It can be seen that ECAP can significantly reinforce the material without obviously decreasing the conductivity in a right strain. Simultaneously, the different extrusion routes can obvious influence the properties of the material, the sample of route A has highest strength, and the route C has best conductivity.
作者单位E-mail
郭廷彪 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 18993093872@163.com 
王晨 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室 601268700@qq.com 
李琦 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室  
吴一博 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室  
唐兴昌 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室  
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