| ZHENG Jian-xin,JIANG Shu-xiang.Residual Stress Field in the Process of 2D Ultrasonic Rolling 7050 Aluminum Alloy[J],46(12):265-269 |
| Residual Stress Field in the Process of 2D Ultrasonic Rolling 7050 Aluminum Alloy |
| Received:June 25, 2017 Revised:December 20, 2017 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2017.12.041 |
| KeyWord:2D ultrasonic rolling residual stress 7050 aluminum alloy finite element simulation |
| Author | Institution |
| ZHENG Jian-xin |
School of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo , China |
| JIANG Shu-xiang |
School of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo , China |
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| Abstract: |
| The work aims to study formation process of residual stress fields and distribution law of surface residual stress of 7050 aluminum alloy after 2D ultrasonic rolling. Finite element software was used to simulate the process of 2D ultrasonic rolling, so as to analyze the formation process of residual stress fields and distribution law of the surface residual stress. Orthogonal experiment was designed to perform 2D ultrasonic rolling test to the 7050 aluminum alloy, so as to study the effect law of process parameters on surface residual stress. Test results were compared with finite element analysis results to validate reasonability of the finite element simulation. During the process of 2D ultrasonic rolling, surface material stress of the 7050 aluminum alloy first decreased and then increased, and finally tended to be stable, and residual stress formed; the residual compressive stress first increased and then decreased in the direction of rolling depth, and later translated into residual tensile stress; the thickness of residual compressive stress layer was about 1.05 mm, and the maximum residual compressive stress was 285 MPa. Provided with identical process parameters, the results obtained from finite element analysis were nearly consistent with the test results. Static pressure had the greatest influence on formation of residual stress, and the surface residual compressive stress increased as the static pressure increased. Severe plastic deformation occurs on the surface of 7050 aluminum alloy as a result of 2D ultrasonic rolling, and certain depth of residual compressive stress forms. The surface residual compressive stress of aluminum alloy increases along with the static pressure, but rotational speed and feed rate have little effect on the residual stress. |
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