高子彤,胡锐,吴与伦,杨劼人.TiAl基合金片层结构粗化行为研究进展[J].稀有金属材料与工程,2019,48(9):3071~3080.[Gao Zitong,Hu Rui,Wu Yulun,Yang Jieren.Research Progress of Lamellar Structure Coarsening Behavior in TiAl Based Alloy[J].Rare Metal Materials and Engineering,2019,48(9):3071~3080.]
TiAl基合金片层结构粗化行为研究进展
投稿时间:2018-04-02  修订日期:2018-07-26
中文关键词:  TiAl合金  片层结构  连续粗化  不连续粗化
基金项目:国家自然科学基金资助(项目号51401168和51774238)
中文摘要:
      片层结构是TiAl合金中最重要的微观结构形态。综述了当前TiAl合金片层结构粗化的研究进展,介绍了TiAl合金片层结构的连续粗化和不连续粗化类型,分析了粗化行为的热力学驱动力来源,包括化学体积自由能、界面能、弹性应变能和晶界能,简述了粗化的动力学特征,并讨论了影响粗化行为的各种因素,包括温度、时间、组织条件和合金元素等。在此基础上研究了Ti-4822合金片层结构的粗化行为,描述并分析了片层高温下连续粗化与不连续粗化行为的特征,及其随温度与时间的变化规律。发现在1160 ℃,两种粗化方式存在明显的竞争关系。在共析温度附近,不连续粗化占据优势地位,而在更高的温度(高于1200 ℃),不连续粗化被抑制,连续粗化占据主导地位。
Research Progress of Lamellar Structure Coarsening Behavior in TiAl Based Alloy
英文关键词:TiAl alloy  lamellar structure  continuous coarsening  discontinuous coarsening
英文摘要:
      Lamellar structure is the most important microstructure in TiAl alloy. We summarize the research progress of coarsening of lamellar structure in TiAl alloy so far, introduce the two types of the lamellar coarsening: continuous and discontinuous coarsening in TiAl lamellar structure, analyse thermodynamic driving force source, including chemical volume free energy, interface energy, elastic strain energy and grain boundary energy of lamellar coarsening, describe the dynamic characteristic of lamellar coarsening and discuss the influence factor of lamellar coarsening, incuding temperature, time, condition of microstructure, alloy elements and so on. On this basis, we astudy the lamellar coarsening of Ti-4822 alloy, describe and analyse its continuous and discontinuous coarsening of lamellar structure at elevated temperature and its change with temperature and time. We conclude that two coarsening types compete obviously at 1160 ℃. Discontinuous coarsening dominates at about eutectoid temperature while continuous coarsening dominates at higher temperature (above 1200 ℃) and discontinuous coarsening is suppressed.
作者单位E-mail
高子彤 西北工业大学 凝固技术国家重点实验室 zitonggao@foxmail.com 
胡锐 西北工业大学 凝固技术国家重点实验室  
吴与伦 西北工业大学 凝固技术国家重点实验室  
杨劼人 西北工业大学 凝固技术国家重点实验室 yangjieren@nwpu.edu.cn 
摘要点击次数: 29
全文下载次数: 10
查看全文  查看/发表评论  
关闭