摘要
研究了Ｃｕ－Ａｌ－Ｎｉ－Ｍｎ－Ｔｉ合金β１相非等温时效过程。在时效前期主要是ＤＯ３有序畴长大和畴内次近邻原子的高度有序化，它引起马氏体点升高。在时效后期，合金中发生了贝氏体转变，它使基体溶质原子富集，导致马氏体点下降，马氏体量减少。在更高的温度下，合金分解成平衡组织。
Non isothermal β 1 phase aging of Cu Al Ni Mn Ti alloy was studied. The main structure changes in the alloy during earlier period of aging are growth of DO 3 order domain and high ordering of nnn atomic pair in the domain, which makes the martensite characteristic temperatures rise. During later period of aging, the bainite transformation takes place in the alloy, which lowers martensite characteristic temperatures and makes martensite amount decrease owing to concentration of solute atoms in the matrix. Further aged at higher temperature, the alloy decomposes into equilibrium phases. The mechanical retardation of bainite and other precipitation make the martensite transformation hysteresis become wider.
出处
《中国有色金属学报》
CSCD
1996年第2期73-77,共5页
The Chinese Journal of Nonferrous Metals
基金
湖南省自然科学基金
