SiC_p增强铝基复合板材力学性能与晶粒取向分布  

MECHANICAL PROPERTIES AND CRYSTALLITE ORIENTATION DISTRIBUTION OF SiC_p REINFORCED ALUMINIUM MATRIX COMPOSITE SHEETS

作　　者：陈礼清[1] 吕毓雄[1] 毕敬[1] 

机构地区：[1]中国科学院金属研究所,沈阳110015

出　　处：《金属学报》1998年第11期1183-1187,共5页Acta Metallurgica Sinica

基　　金：国家863计划!715-005-0080;辽宁省博士科研启动基金!95001

摘　　要：研究了粉末冶金法制备的SiCp增强铝基（Al—3．OCu—1．5Mg—0．4Mn）复合板材在热轧和冷轧状态下的力学性能及板材中的晶粒取向分布结果表明，热轧板材抗拉强度及塑性明显高于冷轧态，屈服强度则低于冷轧态.冷轧板织构主要包含微弱的剪切织构{001}<110>和两个常见的面心立方金属织构组分{110}<112>及{3314}<773>；而热轧板织构近乎无规分布.晶粒取向的择优对复合板材的屈服强度有一定影响，与抗拉强度无关.冷轧板抗拉强度的降低是轧制时产生的大量做裂纹所致．The mechanical properties of an aluminium alloy sheet (Al-3.OCu-1.5Mg-0.4Mn)reinforced by 15% silicon carbide particulate via powder metallurgy technique were investigated under hot-and cold-rolling conditions,and the crystallite orientation distribution in these sheets were also determined by ODF analysis.The hot-rolled sheet composite exhibits much higher ultimate tensile strength and elongation comparing to those of the cold-rolled one. However, the cold-rolled sheet has an elevated 0.2% yield strength.The texture of the cold-rolled sheet composite consists of three weak components, i.e. shear component {001}<110> and two other typical fcc components {110}<112> and {3 3 14}<773>, while the hot rolling texture is almost random. The textured microstructure has an effect on the 0.2% yield strength and do not have any influence on the ultimate tensile strength.The decrease in ultimate tensile strength of the cold-rolled sheet is attributed mainly to the micro-damages produced during cold rolling.

关 键 词：金属基复合材料 粉末冶金法 力学性能 织构 

分 类 号：TB333[一般工业技术—材料科学与工程] TG113.25[金属学及工艺—物理冶金]