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Title:

Effect of Axial Close Rolling on the Structure and Performance of 7050 Aluminum Alloy

Author(s):

ZHAO Jiahang; WANG Jianguo; LIU Dong; YANG Wenhua; NAN Jungang; ZHANG Yu; LIANG Zhirui

1.School of Materials, Northwestern Polytechnical University, Xi’an 710072, China 2.Anhui Hanzheng Bearing Technology , Suzhou 234000, China 3.Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621000, China

Keywords:

axial close die rolling;  7050 aluminum alloy;  structure and performance;  Aluminum alloy thick plate;  ACDR

CLC:

PACS:

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DOI:

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Abstract:

The effect on the microstructure and properties of 7050 aluminum alloy was studied by axial close die rolling (ACDR). The results show that the strain distribution of 7050 aluminum alloy thick plate is as follows: center>1/2R>edge, and mushroom effect exists in the forming process. By OM and SEM, it was found that there were some differences in the forged structure at different locations. The central position is dynamically recrystallized during forming, the dynamic recovery grain grew up perpendicular to the deformation direction at 1/2R, and the structure at the edge was blurred and showed a fibrous structure. After solution treatment at 472 ℃×150 min and dual aging treatment at 120 ℃×400 min, 160 ℃×360 min, radial and chord tensile properties of the core and edge were tested at room temperature, respectively. The results show that there are some differences in the yield strength and elongation of 7050 aluminum alloy at the core and edge, and little difference in the mechanical properties in the radial and chordwise.