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 (11): 1574-1577.DOI: -

• 论著 • 上一篇    下一篇

Sc与Zr对Al-Zn-Mg-Cu铝合金组织及力学性能的影响

赵志浩;王高松;张翼航;崔建忠;   

  1. 东北大学材料电磁过程研究教育部重点实验室;
  • 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(51004036);;

Effects of Sc and Zr on microstructure and mechanical properties of Al-Zn-Mg-Cu aluminum alloy

Zhao, Zhi-Hao (1); Wang, Gao-Song (1); Zhang, Yi-Hang (1); Cui, Jian-Zhong (1)   

  1. (1) Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, G.-S.
  • About author:-
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摘要： 采用铸锭冶金法制备了Al-9.0Zn-2.8Mg-2.5Cu合金,在该合金的基础上,分别添加不同剂量的Sc,Zr和Sc+Zr得到了一系列合金,利用光学显微镜、万能试验机等设备观察分析其金相组织与力学性能.结果表明:分别添加Sc与Zr时,随着Sc与Zr添加量的升高,所得合金的抗拉强度逐渐升高,延伸率逐渐下降,当Sc与Zr的分别添加量增加到0.15%与0.25%时,合金抗拉强度分别为775 MPa与785 MPa,延伸率分别为9.95%与7.1%;复合添加Sc与Zr时,若Sc含量小于Zr时,随着Sc与Zr添加量的增加,所得合金的抗拉强度先上升后下降,延伸率逐渐下降,当添加量为0.04%Sc和0.1...

关键词: Al-Zn-Mg-Cu合金, Sc, Zr, 组织, 力学性能

Abstract: A series of Al-9.0Zn-2.8Mg-2.5Cu alloys with different additions of Sc, Zr and Sc+Zr were prepared by ingot-metallurgy processing. The metallurgical structure and mechanical properties were investigated by optical microscope, universal testing machine and other equipment. The results indicated that when Sc and Zr are added respectively, the tensile strength of alloy increases gradually and the elongation decreases with the increase of addition; the tensile strength and the elongation are 775 MPa and 785 MPa, 9.95% and 7.1%, respectively. When the addition increases from 0.15% to 0.25%. When Sc and Zr are added compositely, if the content of Sr is less than Zr, the tensile strength increases and then declines with the increase of additions, and the elongation gradually decreases. When the addition is up to 0.04%Sc and 0.12%Zr, the tensile strength reaches the maximum value of 775 MPa and the elongation declines to 9.85%.

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