Surface Residual Stress in Aluminum-Lithium Alloy Shot-Peened at Different Shot Peening Intensities
標 簽 鋁鋰合金 噴丸 殘余應力 X射線衍射 aluminum-lithium alloy shot peening residual stress X-ray diffraction
在不同噴丸強度下對鋁鋰合金進行了表面噴丸處理, 采用X射線衍射法和盲孔法分析了其表面及近表層的殘余應力。結果表明：采用不同噴丸強度處理后試樣表面90°方向(平行噴嘴移動方向)的殘余壓應力高于0°方向(垂直噴嘴移動方向)的, 90°方向的衍射峰積分寬度大于0°方向的, 說明噴丸強化后試樣在90°方向產生了更大的微應變; 試樣近表層殘余壓應力隨層深的增加先增大后減小, 最終趨于0; 較高強度噴丸處理后試樣表面和距表面0.15 mm內的殘余壓應力小于較低噴丸強度處理的, 而最大殘余壓應力、最大殘余壓應力深度以及殘余壓應力場深度均大于較低強度噴丸處理后的。
The aluminum-lithium alloy was surface hardened at different shot peening intensities, and then the residual stresses in the surface and near-surface layers were analyzed by X-ray diffraction and the hole-drilling strain-gage method respectively. The results show that the surface residual stresses in 90° direction (parallel to moving direction of the nozzle) of the specimens treated at different shot peening intensities were higher than those in 0° direction (perpendicular to moving direction of the nozzle), and the integral breadth of the diffraction peak in 90° direction was larger than that in 0° direction, indicating that more micro-strains were generated in 90° direction of the specimen after shot peening. With the increase of the depth, the residual compressive stress in the near-surface layer of the specimen first increased then decreased, and finally approached zero. The residual stresses induced after treated at a relatively strong shot peening intensity at the surface and within 0.15 mm below the surface of the specimen were lower than those induced at a relatively weak intensity, while the maximum residual compressive stresses and the depth of the maximum residual compressive stress and the residual compressive stress field were larger than those at a relatively weak intensity.
中圖分類號 TG668 DOI 10.11973/jxgccl201602009
基金項目 張杰(1981-), 男, 河北唐山人, 高級工程師, 博士。
引用該論文: ZHANG Jie,BAI Xue-piao,LU Ye-hang,LI Zhong-cheng. Surface Residual Stress in Aluminum-Lithium Alloy Shot-Peened at Different Shot Peening Intensities[J]. Materials for mechancial engineering, 2016, 40(2): 37～39
張杰,白雪飄,陸業航,李眾城. 不同強度噴丸處理后鋁鋰合金表面的殘余應力[J]. 機械工程材料, 2016, 40(2): 37～39