模具通道夹角对等径角轧制6016铝合金板材组织及力学性能的影响  

Influence of die channel angle of equal channel angular rolling on microstructure and mechanical properties of 6016 aluminum alloy sheets

作　　者：刘文辉 谭永胜[1,2] 邱群 赵晨冰 陈宇强[1,2] Liu Wenhui;Tan Yongsheng;Qiu Qun;Zhao Chengbing;Chen Yuqiang(College of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China;Key Lab of High Temperature Wear Resistant Materials Preparation Technology of Hunan Province,Xiangtan Hunan 411201,China)

机构地区：[1]湖南科技大学材料科学与工程学院,湖南湘潭411201 [2]湖南科技大学高温耐磨材料及制备技术湖南省国防技术重点实验室,湖南湘潭411201

出　　处：《金属热处理》2018年第9期52-58,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(51475162,51405153);湖南省教育厅杰出青年开放基金(16B092)

摘　　要：通过准静态单轴拉伸试验、光学显微镜观察以及XRD等手段研究了模具通道夹角对等径角轧制6016铝合金合金板材组织和性能的影响。结果表明：模具通道夹角并不改变合金的织构类型,但135°模具通道夹角下合金板材能有效地弱化织构。同时,经T4P处理（固溶处理＋预时效＋自然时效）后,135°模具通道夹角下T4P态合金板材伸长率A〉28%,规定塑性延伸强度R_（p0.2）〈115 MPa,平均塑性应变比r-≈0.69,平面各向异性Δr≈0.24,具有良好的塑性和成形性能。Effect of die channel angle of equal channel angular rolling（ ECAR） on the microstructure and mechanical properties of 6016 aluminum alloy sheets were investigated by using quasi-static uniaxial tensile experiment,optical microscopy（ OM） and X-Ray diffraction（ XRD）. The results show that die channel angle does not change the types of texture components but the sheet rolled at die channel angles of 135° can weaken textures effectively. At the same time,the sheet after T4 P treatment（ solution treatment ＋ pre-aging ＋ natural aging）shows good elongation（ A 28%）,good strength（ R_（p0.2） 125 MPa）,good formability（ r-≈0. 69,Δr≈0. 24）.

关 键 词：6016铝合金 等径角轧制 模具通道夹角 织构 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]