中国物理B ›› 2010, Vol. 19 ›› Issue (9): 96203-096203.doi: 10.1088/1674-1056/19/9/096203

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Effects of high-pressure heat treatment on the solid-state phase transformation and microstructures of Cu61.13Zn33.94Al4.93 alloys

王海燕1, 刘建华2, 彭桂荣2, 王文魁2   

  1. (1)Provincial Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, China; (2)State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
  • 收稿日期:2010-03-23 修回日期:2010-05-17 出版日期:2010-09-15 发布日期:2010-09-15

Effects of high-pressure heat treatment on the solid-state phase transformation and microstructures of Cu61.13Zn33.94Al4.93 alloys

Wang Hai-Yan(王海燕)a), Liu Jian-Hua(刘建华)b), Peng Gui-Rong(彭桂荣)b)† , and Wang Wen-Kui(王文魁)b)   

  1. a Provincial Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, China; b State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
  • Received:2010-03-23 Revised:2010-05-17 Online:2010-09-15 Published:2010-09-15

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摘要： The phase transformation activation energy of the Cu61.13Zn33.94Al4.93 alloys, which were treated at 4 GPa and 700 °C for 15 minutes, was calculated by means of differential scanning calorimetry curves obtained at various heating and cooling rates. Then, the effects of high-pressure heat treatments on the solid-state phase transformation and the microstructures of Cu61.13Zn33.94Al4.93 alloys were investigated. The results show that high-pressure heat treatments can refine the grains and can change the preferred orientation from (111) to (200) of α phase. Compared with the as-cast alloy, the sample with high-pressure heat treatment has finer grains, lower β' → β and β → β ' transformation temperature and activation energy. Furthermore, we found that high cooling rate favours the formation of fine needle-like α phase in the range of 5--20 °C/min.

Abstract: The phase transformation activation energy of the Cu61.13Zn33.94Al4.93 alloys, which were treated at 4 GPa and 700 ℃ for 15 minutes, was calculated by means of differential scanning calorimetry curves obtained at various heating and cooling rates. Then, the effects of high-pressure heat treatments on the solid-state phase transformation and the microstructures of Cu61.13Zn33.94Al4.93 alloys were investigated. The results show that high-pressure heat treatments can refine the grains and can change the preferred orientation from (111) to (200) of α phase. Compared with the as-cast alloy, the sample with high-pressure heat treatment has finer grains, lower β' → β and β → β ' transformation temperature and activation energy. Furthermore, we found that high cooling rate favours the formation of fine needle-like α phase in the range of 5–20 °C/min.

Key words: Cu61.13Zn33.94Al4.93 alloy, high-pressure heat treatment, solid-state phase transformation, microstructures

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  • 6250