东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (4): 512-515.DOI: -

• 论著 • 上一篇    下一篇

外加载荷对2124合金微观组织和性能的影响

权力伟;赵刚;田妮;   

  1. 东北大学材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(51001022);;

Effect of additional load on the performance and microstructure of 2124 alloy

Quan, Li-Wei (1); Zhao, Gang (1); Tian, Ni (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials of the Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Quan, L.-W.
  • About author:-
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摘要： 采用透射电镜、拉伸等实验研究了2124合金在190和170℃加载时效后的组织和性能的变化规律.结果表明,由于位错提供了足够的错配度,S相在各个方向上的取向和数量基本相同;外加载荷对Al-Cu-Mg合金中S相的择优取向没有较明显的影响,但其尺寸相对较小,外加载荷对GPB的尺寸和取向分布都没有影响;在190℃加载时效时S相的长大速率比在170℃要快;在相同时效条件下,大量析出较细的S相使施加载荷样品的屈服强度要高于未施加载荷的样品.

关键词: Al-Cu-Mg合金, 择优取向, S相, 变形

Abstract: Microstructure and performance were investigated on aged 2124 alloy at 190 and 170°C with or without added load by means of TEM, tensile testing. Due to dislocations providing enough misfits for the nucleation of S phases, equivalent S phase distribution in various directions was obtained. Load did not significantly impact preferential orientation of the S phase. However, length of the S phase in aged samples with load was shorter than that without load. Load had no significant impact on preferential orientation and length of GPB. Growth rate of the S phase aged at 190°C was faster than that at 170°C with load. Because of a large amount of fine S phase precipitation, yield strength of the aged alloy with load was larger than that without load.

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