【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、推迟了表面孔洞的形成和长大更多还原

【Abstract】 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更多还原