J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (06): 749-752.

• Articles • 上一篇    下一篇

Al3(Sc, Zr)相的粗化行为及其对合金再结晶抗力的影响Coarsening behavior of Al3(Sc, Zr) precipitates and its influence on recrystallization temperature of Al-Mg-Sc-Zr alloy

杜刚1;邓静伟2;闫德胜3;赵明久1;戎利建3   

  1. 1. 中国科学院金属研究所
    2.
    3. 金属研究所
  • 收稿日期:2008-03-25 修回日期:2008-10-14 出版日期:2009-11-28 发布日期:2009-11-24
  • 通讯作者: 戎利建
  • 基金资助:

    中国科学院创新基金 No: CXJJ-205

Coarsening Behavior of Al3(Sc, Zr) Precipitates and Its Influence on Recrystallization Temperature of Al-Mg-Sc-Zr Alloy

Gang Du, Jingwei Deng, Desheng Yan, Mingjiu Zhao, Lijian Rong   

  1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2008-03-25 Revised:2008-10-14 Online:2009-11-28 Published:2009-11-24
  • Contact: Lijian Rong
  • Supported by:

    the Innovation Foundation of Chinese Academy of Sciences (Grant No. CXJJ-205)

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摘要：

研究了Al-Mg-Sc-Zr合金在不同热加工工艺下Al3(Sc, Zr)相的粗化行为及其对合金再结晶抗力的影响。研究发现：热加工过程中试样加热温度的升高以及加热时间的延长均能引起合金再次冷变形后再结晶温度的降低。550℃×1小时或475℃×50小时保温后Al3(Sc, Zr)颗粒对再结晶的抑制作用完全消失。显微组织观察发现残留位错等缺陷在加热过程中加快了Al3(Sc, Zr)颗粒的粗化速率。粗化过程伴随着颗粒密度的降低及共格界面的破坏。

关键词: Al3(Sc, Zr)析出相, 粗化, 再结晶, 扩散

Abstract:

Effects of intermediate annealing temperature and time after hot working on recrystallization temperature (Tr) of Al-Mg-Sc-Zr alloy subjected to further cold working were investigated. It was found that Tr of cold worked alloy dropped with the rise of intermediate annealing temperature or extension of annealing time, due to coarsening of Al3(Sc, Zr) particles during intermediate annealing. After annealed at 550°C for 1 h or 475°C for 50 h, Tr is nearly same as that in a Sc, Zr free 5A06 alloy. Coarsening mechanism was also discussed. After hot rolling, residual dislocations promoted diffusion of Sc and Zr atoms at the elevated temperature of the intermediate annealing. Easier diffusion sped the growth of the Al3(Sc, Zr) particles, resulting in a coherency loss and quantity reduction of the particles.

Key words: Al3(Sc, Zr) precipitates, Coarsening, Recrystallization, Diffusion