铸轧Al-Mn合金板材的各向异性分析  

Analysis of Mechanical Anisotropy in Casting-rolling Al-Mn Alloy Sheet

作　　者：郭海斌[1] 袁鸽成[1] 林典海 袁潜[1] 

机构地区：[1]广东工业大学材料与能源学院

出　　处：《特种铸造及有色合金》2015年第12期1315-1317,共3页Special Casting & Nonferrous Alloys

基　　金：广东省自然科学基金资助项目(2014A030313518)

摘　　要：分析了织构、晶界及第二相对铸轧Al-Mn合金板材各向异性的影响。结果表明,铸轧铝板与轧向0°、45°、90°夹角方向上屈服强度分别为158.51、141.78、164.32 MPa,且其屈服强度、抗拉强度、伸长率的平面各向异性指数(IPA)均大于8,表明其力学性能具有各向异性;铸轧铝板的晶粒沿着轧向呈带状,主要含{112}<111>、{123}<634>两种织构,第二相呈非等轴状且分布不均匀;织构、晶界及第二相的共同作用导致了铸轧铝板力学性能的各向异性。Effects of grain boundary,second phase and texture on the anisotropy of casting-rolling Al-Mn alloy sheet were analyzed.The results show that the yield strength in direction of 0°,45°,90°relative to the casting-rolling aluminium sheet reaches up to 158.51 MPa,141.78 MPa,164.32 MPa,respectively.Meanwhile,the planar anisotropy index（IPA）of yield strength,tensile strength and elongation are more than 8,which means that the casting-rolling aluminium sheet exhibits anisotropy.The grain in casting-rolling aluminium sheet exhibits elongated grain strip structure,and the primary textures in casting-rolling aluminium sheet include mainly{112}111 texture and {123}634 texture.The shape of the second phase size exhibits asymmetrical structure with heterogenerous distribution.The anisotropy of mechanical properties of the alloy is dominated by the grain boundary,second phase and crystallographic texture based on joint action.

关 键 词：铸轧铝板 各向异性 织构 EBSD 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG335.5[金属学及工艺—金属材料]