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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(英文),2019,48(4):1065~1073.[guotingbiao,wangchen,liqi,wuyibo and 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.]
Texture evolution and strengthening behavior of single crystal copper during equal channel angular pressing
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Received:November 16, 2017  Revised:April 12, 2018
DOI:
Key words: engineering equal channel angular pressing  electron backscattered diffraction  texture  single crystal copper
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
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guotingbiao,wangchen,liqi,wuyibo and tangxingchang  
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Abstract:
      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.