Effect of internal pressure on microstructure of tube shear hydro-bending of 5A02 aluminum alloys
来源期刊：中国有色金属学报(英文版)2011年第z2期
论文作者：HAN Cong WANG Yong XU Yong-chao YUAN Shi-jian
文章页码：429 - 433
Key words：hydroforming; microstructure; EBSD; tube; aluminum alloys
Abstract: In order to study the effect of shear deformation on microstructure, the formed shear hydro-bent tube of aluminum alloy was investigated by using electron back scattered diffraction (EBSD). The effect of internal pressure on the microstructures of the outside and inside corner zones was analyzed. The results show that the grain size is 50-100 μm at outside and 30-50 μm at inside under the internal pressure of 15.2 MPa, while the grain size of the undeformed tube is 100 μm. When the internal pressure reaches to 38.0 MPa, the grain is further refined and the grain size becomes 30-50 μm at outside and 10-20 μm at inside. The shear deformation plays an important role in the microstructure of two corner zones. The grain in the corner zones is refined and the size is becoming smaller with the internal pressure increasing. The grain size of inside is smaller than that of outside even if the internal pressure is the same for the different deformation degree.
HAN Cong, WANG Yong, XU Yong-chao, YUAN Shi-jian
(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
Abstract:In order to study the effect of shear deformation on microstructure, the formed shear hydro-bent tube of aluminum alloy was investigated by using electron back scattered diffraction (EBSD). The effect of internal pressure on the microstructures of the outside and inside corner zones was analyzed. The results show that the grain size is 50-100 μm at outside and 30-50 μm at inside under the internal pressure of 15.2 MPa, while the grain size of the undeformed tube is 100 μm. When the internal pressure reaches to 38.0 MPa, the grain is further refined and the grain size becomes 30-50 μm at outside and 10-20 μm at inside. The shear deformation plays an important role in the microstructure of two corner zones. The grain in the corner zones is refined and the size is becoming smaller with the internal pressure increasing. The grain size of inside is smaller than that of outside even if the internal pressure is the same for the different deformation degree.
Key words:hydroforming; microstructure; EBSD; tube; aluminum alloys
