| 时效温度对Ni-Al-V合金筏化影响的微观相场模拟 |
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| 引用本文： | 杨坤,陈铮,张明义,王永欣.时效温度对Ni-Al-V合金筏化影响的微观相场模拟[J].中国有色金属学报,2011,21(4). |
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| 作者姓名： | 杨坤 陈铮 张明义 王永欣 |
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| 作者单位： | 1. 西北工业大学材料科学与工程学院,西安,710072
2. 西北工业大学凝固技术国家重点实验室,西安,710072;西北工业大学材料科学与工程学院,西安,710072 |
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| 基金项目： | 国家自然科学基金资助项目，陕西省自然科学基金资助项目，西北工业大学博士论文创新基金资助项目 |
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| 摘 要： | 基于微观相场动力学模型,以Ni<,75>Al<,25-x>V<,x>合金为对象,研究时效温度变化对沉淀相竞争生长机制及筏状组织形成的影响.结果表明:相的生长和粗化存在各向异性和竞争机制;当具有生长各相异性的DO<,22>相数量较少、尺寸较大时,易形成单一方向排布的组织,从而促使具有生长各向同性的L12相也沿着特定的方向生长,最终形成具有高度择向生长的"筏状"组织,且随着时效温度的降低,沉淀相提前析出;若L12相先析出,时效温度越低,DO<,22>相越多,组织筏化越不明显;若DO<,22>先析出,时效温度越低,DO<,22>相越少,组织筏状越显著.
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| 关 键 词： | Ni75Al25-xVx合金 微观相场 筏化 时效温度 |
Microscopic phase-field simulation of influence of ageing temperature on raft in Ni-Al-V alloys |
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| YANG Kun,CHEN Zheng,ZHANG Ming-yi,WANG Yong-xin.Microscopic phase-field simulation of influence of ageing temperature on raft in Ni-Al-V alloys[J].The Chinese Journal of Nonferrous Metals,2011,21(4). |
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| Authors: | YANG Kun CHEN Zheng ZHANG Ming-yi WANG Yong-xin |
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| Affiliation: | YANG Kun2,CHEN Zheng1,2,ZHANG Ming-yi2,WANG Yong-xin2 (1.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China,2.School of Materials Science and Engineering,China) |
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| Abstract: | Based on the microscopic phase-field kinetic model and Ni75Al25-xVx alloy,the influences of ageing temperature on the competitive growth mechanism and raft structure were studied.The results show that the growth and coarsening of phase is a competitive process.It will form raft structure when the number of DO22 is less and the size is larger,causing L12 phase growing along the same direction.The precipitate phases appear earlier at a low temperature.There is more DO22 grain and not obvious raft structure at... |
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| Keywords: | Ni75Al25-xVx alloy microscopic phase-field raft ageing temperature |
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