表面技术2017，Vol.46Issue(12)：265-269,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.12.041
7050铝合金二维超声滚压加工残余应力场研究
Residual Stress Field in the Process of 2D Ultrasonic Rolling 7050 Aluminum Alloy
摘要
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. Ortho-gonal 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 reaso-nability of the finite element simulation. During the process of 2D ultrasonic rolling, surface material stress of the 7050 alumi-num alloy first decreased and then increased, and finally tended to be stable, and residual stress formed; the residual compres-sive 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 in-creased 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 alumi-num alloy increases along with the static pressure, but rotational speed and feed rate have little effect on the residual stress.关键词
二维超声滚压/残余应力/7050铝合金/有限元模拟Key words
2D ultrasonic rolling/residual stress/7050 aluminum alloy/finite element simulation分类
矿业与冶金引用本文复制引用
郑建新,蒋书祥..7050铝合金二维超声滚压加工残余应力场研究[J].表面技术,2017,46(12):265-269,5.基金项目
河南省高等学校重点科研项目(16A460006) （16A460006）
国家自然科学基金项目(51005071,51575163)Supported by the Key Scientific Research Projects of Henan Province (16A460006), National Natural Science Foundation of China (51005071, 51575163) （51005071,51575163）
