Strength-plasticity matching regulation of cold rotary forged Al5A06 sheets by annealing treatment and its influence on fatigue property

Hu, Xuan; Han, Xinghui; Hua, Lin; Chai, Fang; Zhuang, Wuhao; Zheng, Fangyan; Yin, Fei; Wang, Xiaokai

doi:10.1016/j.jmst.2024.01.020

Cited by 5 publications

(1 citation statement)

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“…This complex deformation pattern leads to a complex change in deformation stress in the center region of the plate during the forming process. Once the stress reaches a critical value, it results in the emergence and coalescence of cracks in the center layer, which rapidly extend to other regions, leading to overall cracking failure [ 31 ]. Therefore, aluminum alloy plates need to be treated with residual stress relief after rotary forging to avoid fatigue failure.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic Non-Destructive Detection Method for Residual Stress in Rotary Forging Aluminum Alloy Plates

Chen,

Wang,

Han

et al. 2024

Materials

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Aluminum alloy plates are widely used to manufacture large-scale integral structure parts in the field of aerospace. During the forming and processing of aluminum alloy plates, different degrees of residual stress are inevitably produced. Fast and accurate detection of residual stress is very essential to ensuring the quality of these plates. In this work, the longitudinal critically refracted (LCR) wave detection method based on a one-transmitter and double-receiver (OTDR) transducer and the finite element simulation were employed to obtain the residual stress. Aluminum alloy plates with different deformation amounts were fabricated by rotary forging to obtain different residual stress states. Results reveal that the plate formed by rotary forging is in a stress state of central tension and edge compression. As the deformation increases from 20% to 60%, the peak residual tensile stress increases from 156 MPa to 262 MPa, and there is no significant difference in the peak compressive stress. When the deformation reaches 60%, the difference in the residual stresses at different depths is less than 13%, which indicates that the plastic deformation zone basically penetrates the entire longitudinal cross-section of the plate. The maximum deviation between measurement and FE is 61 MPa, which means the experimental data are in good agreement with the FE results.

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Section: Resultsmentioning

confidence: 99%