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.
出处
《航空材料学报》
EI
CAS
CSCD
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)
关键词
TI14合金
半固态变形
高温拉伸
断口特征
韧性断裂
Ti14 alloy
semi-solid forg
high temperature tensile properties
fractography
ductile fracture
