Ti-6Al-4V中界面能对α相片层生长的影响三维相场模拟

金属学报, 2012, 48(2): 148-158. doi: 10.3724/SP.J.1037.2011.00308

Ti-6Al-4V中界面能对α相片层生长的影响三维相场模拟

杨梅 ^1, , 王刚 ^2, , 滕春禹 ^3, , 徐东生 ^4, , 张鉴 ^5, , 杨锐 ^6, , 王云志 ^7,

基金项目: 和中国科学院信息化建设专项项目(INFO-115-B01) 国家重点基础研究发展计划项目(2011CB606404)

关键词：相场 , Ti-βAl-4V , 界面能各向异性 , α相片层 , 成分场

3D PHASE FIELD SIMULATION OF EFFECT OF INTERFACIAL ENERGY ANISOTROPY ON SIDEPLATE GROWTH IN Ti-6Al-4V

采用相场方法定量模拟了界面能各向异性对Ti-6Al-4V合金片层α相生长的影响.模拟所需的动力学与热力学数据分别来自DICTRA 和 Thermo-Calc数据库.结果表明,在高温热处理条件下,界面能各向异性是控制α相形貌的重要因素.温度越高α相沿长度方向生长越慢,片层的宽度和厚度越大.定量研究了新生α相和残余β相的宽度和厚度随模拟条件的变化,统计结果表明,对应于不同的界面能各向异性,α相的宽厚比演化规律不同,界面能各向异性越强,生成的α相越宽,残余β相宽度也越大.溶质场分析表明,生长过程中溶质分布不均匀,在相界β侧形成了Al贫瘠区和V富集区,且界面能各向异性越强,溶质场不均匀越明显.

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Ti-6Al-4V中界面能对α相片层生长的影响三维相场模拟

3D PHASE FIELD SIMULATION OF EFFECT OF INTERFACIAL ENERGY ANISOTROPY ON SIDEPLATE GROWTH IN Ti-6Al-4V

参考文献