织构对铝-镁-钪合金板材平面各向异性的影响  

Effects of Texture on Anisotropy of Al-Mg-Sc Alloy Plate

作　　者：姜锋[1] 徐燕萍[1] 陈宜钊[1] 黄宏锋[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《热加工工艺》2011年第20期27-30,33,共5页Hot Working Technology

基　　金：湖南省自然科学基金资助项目(10JJ2042)

摘　　要：采用室温拉伸、X-射线衍射技术(XRD)等方法研究了不同取向条件下铝-镁-钪合金冷轧-退火态板材的织构类型以及拉伸力学性能的各向异性。通过Schmid因子及其倒数的加权计算,初步探讨了织构对合金板材力学性能各向异性的影响。结果表明,经350℃×1 h退火后,铝-镁-钪合金板材的织构组分主要为S织构{123}<634>和Brass织构{110}<112>等典型的形变织构;合金板材在纵向(0°方向)和横向(90°方向)的屈服强度较高,在45°拉伸方向的屈服强度较低,并且表现出反常的各向异性,而伸长率则在45°拉伸方向上最高。经分析可知,织构是影响合金板材平面各向异性的主要因素。The crystallographic textures and anisotropy of mechanical properties of Al-Mg-Sc alloy plates under annealed following cold rolling condition were studied by tensile test and XRD analysis.Through calculating Schmid of simple component texture and weighting reciprocal of multi-component textures,the influences of texture on the mechanical properties anisotropy of the alloy plates were discussed.The results show that the main textures of Al-Mg-Sc plate are S{123}634and Brass{110}112,which are deformation texture.The mechanical properties of the alloy show anisotropy.The tensile strength is higher at the lengthwise direction（0°） and transverse direction（90°）,but the tensile strength along with 45° is lower;furthermore,Al-Mg-Sc alloy plate shows abnormal anisotropy： the tensile strength of the transverse direction（90°） is higher than the lengthwise direction（0°）.The elongation rate at 45° is larger than other orientations.The crystallographic texture is the major cause of the anisotropy of the alloy plate.

关 键 词：铝-镁-钪合金 力学性能 各向异性 织构 Schmid因子 

分 类 号：TG146.2[一般工业技术—材料科学与工程]