应变量对TC21合金微观组织和拉伸性能的影响  

Influence of Strain on Microstructure and Tensile Properties of TC21 Alloy

作　　者：张晓园[1] 史小云[1] 杜予晅[1] 唐晓东[1] 

机构地区：[1]西部超导材料科技股份有限公司陕西省航空材料工程实验室,陕西西安710018

出　　处：《热加工工艺》2013年第6期48-50,共3页Hot Working Technology

摘　　要：研究了α+β两相区变形时不同应变量下,TC21合金的微观组织演变过程及拉伸性能变化规律。结果表明,应变量对初生α相的形态有显著影响;随应变量的增大,初生α相的形态由短棒状逐渐转变为等轴状;初生α相含量逐渐减少;初生α相等轴化程度越高、含量越多将有利于提高合金的强度;球化及针状的次生α相对提高合金强度有利,而片层状次生α相则使合金强度降低;确定了合金初生α相球化程度最好和含量最高的应变量在6.0附近。The microstructure evolution and tensile properties of TC21 alloy were conducted at different strains in α＋β region. The experimental results show that the strain can affect the morphology of primary α phase. The morphology of primary α phase changes from short-clubbed grains into equiaxed grains and the amount of primary α phase decreases gradually with the increase of strain. The primary α phase is more equiaxed and more enough, the tensile strength is more high. The equiaxed/acicular subordinate α phase is in favor of increasing the tensile strength, but the lamellar subordinate α phase is not. The best deformation parameters to gain equiaxed and more primary α phase are at the strain of 6.0.

关 键 词：TC21合金 应变量 微观组织 拉伸性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]