半固态加工Ti14阻燃合金的高温拉伸性能和断口特征  

High Temperature Tensile Properties and Facture Character of Ti14 Alloy after Semi-Solid Deformation

作　　者：陈永楠[1] 魏建锋[1] 赵永庆[2] 屈可朋[1] 王慧[1] 

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]西北有色金属研究院,西安710016

出　　处：《航空材料学报》2008年第6期41-45,共5页Journal of Aeronautical Materials

基　　金：重大基础研究前期研究专项项目(2005CCA06400);国家863项目(2002AA336040)

摘　　要：以新型阻燃合金Ti14为研究对象,通过力学性能测试和断口分析等方法对比研究了合金常规加工和半固态加工后,试样在不同温度区间的宏观力学行为,分析了断口的宏观、微观形貌及断裂机制。结果表明:半固态加工试样300℃以下拉伸,表现出高强度、低塑性特征,400℃以上拉伸两种加工方法的强度和塑性非常接近;半固态高温断口特征表现为韧性断裂,宏观断口存在明显的二次裂纹。The tensile properties of Ti14, a new typical α ＋ Ti2Cu alloy, after solid and semi-solid forging （SSF） were researched at high temperature. The fractography of specimens were analyzed by SEM. The fracture mechanisms of Ti14 alloy were studied. One kind of the specimens were processed by SSF showed high strength and low ductility under 300℃ , and the other kind of the specimens were processed by two methods performed same tensile properties at high temperatures. The fractography of Ti14 alloy after SSF showed a feature of ductile fracture, and much microcracks were detected in fracture surface.

关 键 词：TI14合金 半固态变形 高温拉伸 断口特征 韧性断裂 

分 类 号：TG146.2[一般工业技术—材料科学与工程]