表面涂层对等温锻造TiAl合金超塑性的影响  

EFFECT OF COATING ON THE SUPERPLASTICITY OF ISOTHERMALLY FORGED TiAl ALLOY

作　　者：张建民[1] 李世琼[2] 邹敦叙[2] 仲增塘 

机构地区：[1]冶金工业部钢铁研究总院高温合金研究室,北京市100081 [2]冶金工业部钢铁研究总院

出　　处：《材料研究学报》1997年第5期503-506,共4页Chinese Journal of Materials Research

基　　金：国家自然科学基金!5937065;863计划

摘　　要：通过板状试样的高温拉伸试验、研究了表面涂层对等温锻造TiAl合金超塑性的影响结果表明，试样涂以纯错，可以提高TiAl合金的超塑性，其原因是涂层既避免了表面高温氧化；又优先形成孔洞，释放了表面的局部应力。The effect of coating of pure aluminum on the superplasticity of isothermally forged TiAl alloy is studied by tension experiments of plate specimen at high temperatures. It is found that the superplasticity of TiAl alloy will greatly increase when the surface of a specimen is coated by pure aluminum.The coating protects the specimen from oxidizing and releases the location stress on the surface of the specimen, which will delay the formation and expansion of cavities.Kwyeords: coating TiAl superplasticity cavity

关 键 词：涂层 超塑性 孔洞 钛铝合金 

分 类 号：TG146.23[一般工业技术—材料科学与工程]