Analysis of surface roughening behavior of 6063 aluminum alloy by tensile testing of a trapezoidal uniaxial specimen

被引:30
作者
Cai, Yang [1 ]
Wang, Xiaosong [1 ,2 ]
Yuan, Shijian [1 ,2 ]
机构
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 672卷
关键词
6063 aluminum alloy; Surface roughening; Deformation behavior; Microstructure; Tensile deformation; DEFORMATION; EVOLUTION; PLASTICITY; SIMULATION; MAGNESIUM; METALS; SHEET;
D O I
10.1016/j.msea.2016.07.008
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
To determine the quantitative relationship between surface roughness and strain, the surface roughening behavior of a 6063 aluminum alloy tube was examined by tensile testing of a trapezoidal uniaxial specimen, that can provide a continuous strain distribution after tensile deformation. The surface roughness was measured using a laser scanning confocal microscope to reflect the degree of roughening. The microstructure and surface morphology were examined using electron back-scattered diffraction and in situ scanning electron microscopy to determine the grain orientation and surface topography evolution. The surface roughness increased with strain when the strain was less than 0.067 and then decreased slightly, with a maximum surface roughness of 23.73 mu m. Inhomogeneous deformation at the grain boundaries and inside the grains was enhanced with increasing strain, resulting in an increase of surface roughness when the strain was below a critical value. As the strain increased, a greater number of slip systems contributed to the further deformation. Thus, the strain became more homogeneous, and accordingly, the surface roughness slightly decreased. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:184 / 193
页数:10
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