封蕾,李建国,毛轶哲,李聪.同时添加钪、锆对Al-10Mg合金再结晶机制的影响[J].稀有金属材料与工程,2019,48(9):2841~2847.[Feng Lei,Li Janguo,Mao Yizhe,Li Cong.Effect of complex addition of Sc, Zr on dynamic recrystallization mechanism of Al-10Mg alloy[J].Rare Metal Materials and Engineering,2019,48(9):2841~2847.]
同时添加钪、锆对Al-10Mg合金再结晶机制的影响
投稿时间:2018-04-08  修订日期:2018-04-25
中文关键词:  Al-10Mg合金  Al3(Sc,Zr)沉淀相  再结晶  位错  亚晶
基金项目:中国国家科技部国际科技合作专项资金(No. 2015DFR50470)资助
中文摘要:
      利用电子背散射衍射(EBSD)和透射电子显微镜(TEM)研究了Al-10Mg及Al-10Mg-0.1Sc-0.1Zr合金在热压缩过程中的组织演变及动态再结晶机制。结果表明:同时添加Sc、Zr能够明显细化Al-10Mg合金的铸态晶粒,热处理后,Sc、Zr能够形成与α-Al基体共格的Al3(Sc,Zr) 相,这些沉淀相能够提高合金的热变形抗力;在变形过程中,Al3(Sc,Zr)相能够钉扎位错运动、降低晶界及变形带处的位错密度,使位错在沉淀相周围聚集,因而改变了Al-10Mg合金内部位错增殖与湮灭的过程、进而使Al-10Mg合金动态再结晶方式由不连续动态再结晶(DDRX)转变为连续动态再结晶(CDRX)。
Effect of complex addition of Sc, Zr on dynamic recrystallization mechanism of Al-10Mg alloy
英文关键词:Al-10Mg alloy  Al3(Sc,Zr) precipitation  Recrystallization  Dislocation  Sub-grain
英文摘要:
      The microstructure evolution and recrystallization mechanism of compressed Al-10Mg alloy with and without addition of Sc and Zr have been observed through electron back-scattered diffraction (EBSD) and transmission electron microscope (TEM). Through precipitate of Al3(Sc,Zr) precipitation, original grain is ferined. Also, flow stress can be increased. In the presence of Al3(Sc,Zr) precipitation, dislocation motivation is impeded; concentration of dislocation in grain boundary yet, deformation band is decreased and not enough for nucleation of recrystallized grain; accumulation and annihilation of dislocation is affected. Recrystallization grain is formed through rotation of subgrain in Al-10Mg-Sc-Zr alloy. After which, recrystallization mechanism of Al-10Mg alloy was changed from discontinuous dynamic recrystallization (DDRX) into continuous dynamic recrystallization (CDRX).
作者单位E-mail
封蕾 清华大学材料学院先进材料教育部国家重点实验室 fenglei20120830@163.com 
李建国 清华大学材料学院先进材料教育部国家重点实验室 jg.li@mail.tsinghua.edu.cn 
毛轶哲 清华大学材料学院先进材料教育部国家重点实验室 maoyizhebit@126.com 
李聪 清华大学材料学院先进材料教育部国家重点实验室 cli@metallurgie.rwth-aachen.de 
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