摘要
在含２０．５ａ％Ａｌ的Ｎｉ３Ａｌ合金中加入铈的研究结果表明：（１）含饰量大约高于０．０４ｗｔ％合金的冷轧性能很差，无法轧成薄材；（２）含铈量为０．０１１ｗｔ％的Ｎｉ３Ａｌ合金，在５５０℃等温１２０ｈ和１２００℃等温０．５ｈ的室温延伸率可达１６％，σｂ为９００ＭＰａ左右，断口为穿晶断裂形貌，综合机械性能好；而７５０℃等温４０ｈ和１０００℃等温１ｈ的室温延伸率仅为３％，σｂ为５００ＭＰａ左右，断口为沿晶形貌，综合机械性能差。
Our study on Ni3Al alloy containing 20.5at% of Al after addition of ceriumshows: 1)For the alloy with cerium of more than 0.04wt% added,it behaves bad in coldrolling and can't be rolled into light sheets;2)For the alloy with cerium of 0. 011wt%added,when it is in the room temperature of 550C with isothermal 120h and 1200'C withisothermal 0. 5h respectively, its specific elongation can be up to 16%, is about 900MPa, the rapture assumes a transcrystalline profile and the combining mechanical behaviour is good,but when it is in the room temperatures of 750'C with isothermal 40h and1000'C with isothermal lh respectively,its specific elongation is only 3%,oh is about 500MPa,the rapture assumes a intergranular profile and the combining mech 'ical behaviouris rather weak.
