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Microscopic phase-field study on aging behavior of Ni_(75)Al_(17)Zn_8 alloy 被引量：1

Microscopic phase-field study on aging behavior of Ni_(75)Al_(17)Zn_8 alloy
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摘要 The precipitating kinetics of Ni75Al17Zn8 alloy was studied at both 873K and 973K by microscopic phase-field model.The calculation results show that the order-disorder transformation experiences the matrix→lowly-ordered L10 phase→L12 phase at 973 K.And the nucleation of L12 particles belongs to the spinodal decomposition mechanism.As temperature increases,orderings of Al and Zn atoms are resisted,but coarsening of L12 particles is promoted.The value of coarsening kinetic exponents approaches to 1/2.In addition,the discussions about Ni-Al anti-site defect and Zn substitutions for Ni site and Al site exhibit that the higher the temperature,the more distinctive the Ni-Al anti-site defect,but the less the Zn substitution. The precipitating kinetics of Ni75Al17Zn8 alloy was studied at both 873K and 973K by microscopic phase-field model.The calculation results show that the order-disorder transformation experiences the matrix→lowly-ordered L10 phase→L12 phase at 973 K.And the nucleation of L12 particles belongs to the spinodal decomposition mechanism.As temperature increases,orderings of Al and Zn atoms are resisted,but coarsening of L12 particles is promoted.The value of coarsening kinetic exponents approaches to 1/2.In addition,the discussions about Ni-Al anti-site defect and Zn substitutions for Ni site and Al site exhibit that the higher the temperature,the more distinctive the Ni-Al anti-site defect,but the less the Zn substitution.
作者 赵彦 陈铮 卢艳丽 张利鹏
机构地区 College of Materials Science and Engineering State Key Laboratory of Solidification Processing
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第4期675-681,共7页 中国有色金属学报（英文版）
基金 Projects(50941020,10902086)supported by the National Natural Science Foundation of China
关键词 microscopic phase-field Ni75Al17Zn8 alloy coarsening behavior microscopic phase-field Ni75Al17Zn8 alloy coarsening behavior
分类号 TG146.15 [金属学及工艺—金属材料]
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Transactions of Nonferrous Metals Society of China
2010年 第4期

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