金属热处理 ›› 2020, Vol. 45 ›› Issue (3): 7-10.DOI: 10.13251/j.issn.0254-6051.2020.03.002

• 组织与性能 • 上一篇    下一篇

T5态7N01铝合金挤压型材的组织及拉伸性能各向异性

邓鹏, 孙红亮, 陈志元, 杨康, 蔡政坤   

  1. 西南交通大学 材料科学与工程学院, 四川 成都 610031
  • 收稿日期:2019-09-16 出版日期:2020-03-25 发布日期:2020-04-03
  • 通讯作者: 孙红亮,副教授,主要从事铝合金损伤容限研究,E-mail:sunhlcd@163.com
  • 作者简介:邓 鹏(1993—),男,硕士研究生,主要从事钛铝合金、铝合金材料研究,E-mail:2318500583@qq.com。
  • 基金资助:

    国家重点研发计划(2016YFB1200505)

Microstructure and anisotropy tensile properties of T5 state 7N01 aluminum alloy extruded profile

Deng Peng, Sun Hongliang, Chen Zhiyuan, Yang Kang, Cai Zhengkun   

  1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China
  • Received:2019-09-16 Online:2020-03-25 Published:2020-04-03

摘要:

对T5热处理状态下的7N01铝合金挤压型材进行微观组织观察和拉伸强度测试。试验结果表明,7N01型材显微组织存在一定程度上的不均匀以及各向异性,沿挤压方向上的晶粒被拉长形成形变织构。这种形变织构能够更有效地抵抗挤压方向上的塑性变形,因此沿挤压方向的强度比垂直于挤压方向高,伸长率下降约2%。7N01铝合金挤压型材在室温抗拉强度约为368 MPa,屈服强度约为318 MPa,综合性能表现良好。

关键词: 7N01铝合金型材, 力学性能, 显微组织, 形变织构, 各向异性

Abstract:

The microstructure and tensile strength of 7N01 aluminum alloy extruded profiles under T5 heat treatment were studied. The results show that the microstructure of the 7N01 profile has a certain degree of non-uniformity and anisotropy, and the grains in the extrusion direction are elongated to form a deformation texture. Such deformation texture can more effectively resist plastic deformation in the extrusion direction, so the strength in the extrusion direction is higher than that perpendicular to the extrusion direction, and the elongation is reduced by about 2%. The tensile strength and yield strength of the 7N01 aluminum alloy extruded profiles at room temperature is about 368 MPa and about 318 MPa respectively, and the comprehensive properties is good.

Key words: 7N01 aluminum alloy profile, mechanical properties, microstructure, deformation texture, anisotropy

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