韩栋,赵永庆,曾卫东.ARB工艺对TA15板材片层球化的影响规律研究[J].稀有金属材料与工程,2020,49(12):4222~4229.[Han Dong,Zhao Yongqing,Zeng Weidong.Investigation on the influence of ARB process on the spheroidization of TA15 sheet[J].Rare Metal Materials and Engineering,2020,49(12):4222~4229.]
ARB工艺对TA15板材片层球化的影响规律研究
投稿时间:2019-12-30  修订日期:2020-02-11
中文关键词:  TA15 ARB 片层球化  轧制轨迹
基金项目:国家自然科学基金资助(项目号51471136)
中文摘要:
      作为剧烈塑性变形方法的一种,累积叠轧工艺(Accumulative Roll Bonding, ARB)是一种可将晶粒细化至亚μm级技术并大幅度提高板材综合性能的方法。通过研究初始α片层组织、道次变形量分配及换向轧制对片层组织球化程度的影响,可获得ARB工艺对TA15板材片层球化的影响规律。研究结果表明:当初始片层厚度较小及晶界/晶内片层α厚度差异较小时,片层球化更加彻底。道次变形量过大会引起板材温升显著,进而造成晶界及基体片层球化不均匀,而道次变形量过小将导致片层球化不完全,最终影响基体等轴化效果。随着ARB成形过程换向道次的增加,板材各向的均匀程度提升,板材的晶粒尺寸及极差进一步减小,室温拉伸性能显著提高。
Investigation on the influence of ARB process on the spheroidization of TA15 sheet
英文关键词:TA15  ARB  Lamellar spheroidization  Rolling trajectory
英文摘要:
      As one of the methods of severe plastic deformation, accumulative roll bonding (ARB) is a technique that can refine the grains to sub-μm level, and it is also the only method that can greatly improve the comprehensive performance of TA15 sheet while ensuring cost. By studying the influence of the initial structure, ARB rolling trajectory and rolling reversion on the spheroidization degree of the lamellar structure, the effect of ARB process on the spheroidization of TA15 sheet can be obtained. The results show: When the initial lamellar thickness is small and the difference of thickness between grain boundary and intragranular lamellae is small, the lamellar spheroidization is more thorough. The pass deformation of ARB process is too large, the temperature of the TA15 sheet will rise significantly, leading to the uneven spheroidization of the grain boundary and the matrix of TA15. That the pass deformation is too small leads to the incomplete spheroidization of the sheet, and affect the equiaxation effect of the matrix of TA15. With the increase of reversing passes in ARB forming process, uniformity of the sheet is increasing, the grain size and range of the sheet are further reduced, and the room temperature tensile properties are significantly improved.
作者单位E-mail
韩栋 西北工业大学材料学院 hand227@163.com 
赵永庆 西北有色金属研究院 trc@c-nin.com 
曾卫东 西北工业大学  
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