微量Zr对不对称轧制Al-0.8Mg-0.9Si合金板织构及性能的影响  

Effects of Trace Zr on the Solid Solution Texture and Properties of Al-0.8Mg-0.9Si Alloy Sheets by Asymmetrical Rolling

作　　者：杜红 袁鸽成[1] 丁灿培 林典海 杨安宸[1] 吴其光[1] Du Hong;Yuan Gecheng;Ding Canpei;Lin Dianhai;Yang Anchen;Wu Qiguang(Guangdong University of Technology, Guangzhou 510006,China)

机构地区：[1]广东工业大学

出　　处：《稀有金属材料与工程》2019年第6期1860-1866,共7页Rare Metal Materials and Engineering

基　　金：广东省自然科学基金(2014A030313518);广东省科技计划(2017A010103018)

摘　　要：研究了微量Zr对不对称轧制Al-0.8Mg-0.9Si合金板及其固溶处理后的微观结构及性能的影响。结果表明:微量Zr在Al-0.8Mg-0.9Si合金中形成Al3Zr相弥散分布在基体中。在不对称轧制过程中,该Al3Zr化合物对Copper{112}<111>、Brass{011}<211>、S{123}<634>、E{111}<110>和F{111}<112>等形变织构无明显影响;在随后的固溶处理过程中,轧制板材发生的再结晶使得Copper、Brass、S等形变织构的取向密度降低,但不溶的细小Al3Zr相在一定程度上抑制了不连续再结晶行为,反而使轧制过程中形成的E、F剪切织构的取向密度增加。添加微量Zr所形成的上述结构使该合金板材在固溶后获得较好的综合性能,其抗拉强度、屈强比和延伸率分别可达230MPa、0.49和9.5%以上;塑性应变比r值从0.7提高至0.87,杯突值IE由8.94提高至9.84,各向异性度|Δr|由0.15降低至0.04。The effects of trace Zr on microstructure and properties of Al-0.8Mg-0.9Si alloy sheets by asymmetrical rolling and its subsequent solution treatment were investigated. The results show that the Al3 Zr forms in the alloy and disperses in the matrix. The Al3Zr has unobvious effect on the formation of deformation textures Copper{112}<111>, Brass{011}<211>, S{123}<634>, E{111}<110>,F{111}<112> and others during asymmetric rolling process. However, the recrystallization happens during the subsequent solution treatment to reduce the orientation density of the textures Copper, Brass, S etc, while the density of shear textures E and F formed in the asymmetric rolling process increases due to the insoluble fine phase Al3Zr inhibiting recrystallization process to some extent. The structure formed with trace element Zr promotes the alloy plates to get better comprehensive properties, among which the tensile strength, yield ratio and elongation are up to 230 MPa, 0.49 and 9.5%, respectively, the plastic strain ratio r value increases from 0.7 to 0.87, the value of cup drawing IE increases from 8.94 to 9.84, and the anisotropy degree of∣Δr∣decreases from 0.15 to 0.04.

关 键 词：微量元素Zr 不对称轧制 铝合金 织构 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]