+高级检索
不同变形方式下Al-12Zn-2.4Mg-1.2Cu合金的微观组织与性能研究
DOI:
作者:
作者单位:

1中北大学材料科学与工程学院;2中国兵器科学研究院宁波分院

作者简介:

通讯作者:

中图分类号:

基金项目:


Study on the Microstructures and Mechanical Properties of the Al-12Zn-2.4Mg-1.2Cu Alloy under Different Deformation Ways
Author:
Affiliation:

1 College of Materials Science and Engineering, North University of China; 2 Ningbo Branch of Ordance Science Institute of China,

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    本文中,Al-12Zn-2.4Mg-1.2Cu (wt%) 合金的沉积锭被以不同挤压方式挤压成Ф100mm棒材、Ф100mm?Ф80mm无缝管材以及160mm?5mm的板材。通过光学显微镜、力学性能测试试验以及扫描电镜研究了不同挤压制品热处理后的组织和性能。合金沉积态的显微组织中,晶粒为等轴晶,大小为20μm左右。一些第二相分布在晶粒内部和晶界上。在挤压变形过程中,以冶金焊合的方式消除了原先分布在沉积态中晶粒周围的沉积孔隙。在不同挤压制品的挤压方向上,金属流线清晰可见。抗拉强度、屈服强度以及延伸率测试结果表明:热处理后的棒材横向性能分别为:688 MPa, 654 MPa 和12%;纵向性能分别为:698 MPa,674 MPa 和 10.5%。热处理后的板材横截向能分别为783MPa, 748 MPa 和 7%;纵向性能分别为:751MPa, 719 MPa和8%。热处理和无缝管材的;纵向性能分别为781 MPa,735 MPa 和 9%;拉伸断口扫描结果显示,板材、无缝管材以及挤压板材对应的断口分别呈现出韧性断裂、混合型断裂以及脆性断裂形貌特征。

    Abstract:

    In this paper, Al-12Zn-2.4Mg-1.2Cu (wt%) alloy billets as-deposited were extruded to be Ф100mm bar, Ф100mmxФ80mm seamless pipe and 160mmx15mm stripper plate under different deformation ways., respectively. The microstructures and mechanical properties of the products as-heat-treated were studied by optical metallographic, measurement of mechanical performance and scanning electron microscope examination. Metallographic testing results show that the grains in the initial billets are almost equiaxed with diameter about 20μm. There are some second phase precipitated distributing in the grains and the grain boundary. The deposited ventages around the grain as-deposited were welded together by welding metallurgy way during extrusion process. The flow lines were clearly observed in the extrusion direction in the different extrusion products. Properties of the products as-heat-treated including tensile strengths, yield strengths and elongations tests results show that the value of bars are 688 MPa, 654 MPa and12% in the cross direction(CD )and 698 MPa,674 MPa and10.5% in the longitude direction(LD). The value of the plates are 783MPa, 748 MPa and 7% in the CD and 751MPa, 719 MPa, 8%. in the LD. The seamless pipes also have excellent properties which are 781 MPa, 735 MPa and 9% in the LD. Scanning electron microscope examination shows the fracture characteristics of the fractured specimens revealed three different fracture models which are ductile fracture, mixed fracture and brittle fracture corresponding to bars, pipes and plates, respectively.

    参考文献
    相似文献
    引证文献
引用本文

陈刚.不同变形方式下Al-12Zn-2.4Mg-1.2Cu合金的微观组织与性能研究[J].稀有金属材料与工程,2016,45(9):2237~2241.[chen gang. Study on the Microstructures and Mechanical Properties of the Al-12Zn-2.4Mg-1.2Cu Alloy under Different Deformation Ways[J]. Rare Metal Materials and Engineering,2016,45(9):2237~2241.]
DOI:[doi]

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2014-06-21
  • 最后修改日期:2014-07-28
  • 录用日期:2015-02-06
  • 在线发布日期: 2016-10-09
  • 出版日期: