Transactions of Materials and Heat Treatment

Title：Finite element simulation on quenching and stepwise cold compression residual stress of 7050 aluminum alloy large-scale arc die forgings with rib

Authors： Zheng Hao Li Chen Zhang Xinquan Ji Hao

Unit： Aviation Industry Corporation of China The First Aircraft Institute Xi′an 710089 China

KeyWords： 7050 aluminum alloy arc die forgings with rib quenching stepwise cold compression residual stress

ClassificationCode：TG156

year,vol(issue):pagenumber：2025,50(6):187-195

Abstract：

In order to study the value and distribution law of residual stress for large-scale aluminum alloy die forgings in industrial production, the thermophysical parameters and cold compression measured data were obtained by experiment, and the value and distribution of residual stress of 7050 aluminum alloy large-scale arc die forgings with rib during quenching were simulated by finite element software Abaqus. Then, the reduction of residual stress was simulated by five-step cold compression method. The results show that the core and surface of the die forgings is subjected to tensile stress and compressive stress after quenching,respectively. The stress is distributed symmetrically along the thickness direction, the stress distribution in the two sides of webs is more uniform, and the residual stress near the rib root is higher than that far away from the rib root. After five-step cold compression, the residual stress is greatly reduced to below 100 MPa and evenly distributed. The residual stresses on the upper and lower surfaces and the middle cross-sections along the length direction of cold-compressed die forgings are measured by X-ray diffraction, and all results are below 200 MPa, indicating that the accuracy of the finite element simulation calculation is better.

Funds：

作者简介：郑皓（1990-），男，硕士，工程师，E-mail：540042936@qq.com

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