东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2004, Vol. 25 ›› Issue (5): 416-419.DOI: -

• 论著 • 上一篇    下一篇

Al-Zn-Cu系室温低Cu侧的相平衡关系

陈辉;信昕;董丹阳;郝士明   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2004-05-15 发布日期:2013-06-24
  • 通讯作者: Chen, H.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50171019)

Relationship between different phase equilibria of Al-Zn-Cu alloys in low-copper part at room temperature

Chen, Hui (1); Xin, Xin (1); Dong, Dan-Yang (1); Hao, Shi-Ming (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2004-05-15 Published:2013-06-24
  • Contact: Chen, H.
  • About author:-
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摘要： 通过显微组织观察和X射线衍射分析,结合电子探针分析,确定了在Al Zn Cu系中所设计的14个不同成分的合金经充分成分均匀化和平衡阶梯冷却至20℃的合金相组成及成分·在其中11个合金中发现了T′相(Al4Cu3Zn)的存在,测定了4个合金中的T′相的成分,并得到了新的相平衡关系·从另一个侧面证实了T′相在室温时(20℃)是可以稳定存在的,同时说明美国金属学会1997年出版的相图集中的Al Zn Cu系20℃等温截面相图在低Cu侧的相关系上是不正确的·

关键词: Al-Zn-Cu三元系, T′相, 相平衡, 相图, 等温截面, EPMA

Abstract: The phase composition and relevant constituents of 14 different alloys designed for Al-Zn-Cu system were analyzed by means of microscopy, XRD and EPMA, which were all fully homogenized and evenly cooled step to step to 20°C. Among them the T' phase (A4Cu3Zn) was found in 11 alloys, then the composition of T' phases in 4 alloys were determined with the relationship between new phase equilibria. The results prove in another way that the T' phase may exist stably at room temperature, i.e., 20°C. In addition to the conclusion, it also indicates that the relationship between the phase equilibria low-copper part on the isothermal section diagrams at 20°C of Al-Zn-Cu alloys, which were shown in the collection of phase diagrams as published by ASM in 1997, is improper.

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