TiAl基合金显微组织对高温拉伸力学性能的影响  

INFLUENCE OF MICROSTRUCTURE OF TiAl BASED ALLOY ON THE MECHANICAL PROPERTIES AT ELEVATED TEMPERATURE

作　　者：贺跃辉[1] 黄伯云[1] 周科朝[1] 欧文沛[1] 雷长明 陈小群[1] 

机构地区：[1]中南工业大学粉末冶金研究所

出　　处：《中国有色金属学报》1997年第1期75-79,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家"八六三"高技术计划基金;国家自然科学基金

摘　　要：研究了ＴｉＡｌ基合金不同显微组织试样在９００℃下的拉伸力学性能。试验结果表明，在晶粒尺寸相当的前提下，与双态组织相比，细小层片状组织试样表现出良好的高温综合力学性能。采用光学金相显微镜，ＳＥＭ和ＴＥＭ等检测分析仪器。The refined full lamellae (C grain size being 10.7 μm) and duplex (8.6 μm) microstructures of TiAl based alloy have been obtained by multi step thermal mechanical treatment technique for this alloy sample canned with middle carbon steel. The effects of microstructures on the mechanical properties of Ti 33Al 3Cr 0.5Mo(%) alloy with same degree of grain size at 900 ℃ were investigated. The test results showed that compared with the duplex microstructure samples, the TiAl based alloy samples with fully lamellae microstructure exhibited very advanced synthetical mechanical properties at high temperature, especial the tensile elongation being over 100%. The microstructures of samples both before and after tensile test at high temperature were analyzed with optical microscope, SEM and TEM in details.

关 键 词：高温拉伸 显微组织 钛铝合金 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]