Experimental Study on the Thermal Stability of Aluminum Alloy 7075-T651 Structural Parts after Rolling Correction

The rolling correction process can eliminate machining distortions of aluminum alloy 7075-T651 structural parts. thermal stability the corrected parts under action temperature loading, especially macroscopic shape stability, is key to ensure safe service mechanical equipment. In this study, different loads were used postprocess after correction. rolled samples was analyzed by characterizing microstructure and physical properties. results show no obvious change compared in distortion treatments at 120 °C, 160 230 °C 300 °C; changes only 10.48%, 2.74%, 8.13% 8.70%, respectively. residual stresses areas decreased 35.58%, 26.08%, 75.97% 83.13%, microhardness also showed a decreasing trend. There treatment but hardness approximately 5%, 23% 56%, respectively, other temperatures. However, stress relaxed stress. analysis shows that material mainly dominated static reversion lower loads. With increasing load, are affected recrystallization effect, gradually blurred, decreases significantly. conclusion, although introduced would occur degrees relaxation caused load did not significantly affect samples, had good stability.