中国激光, 2004, 31 (1): 125, 网络出版: 2006-06-12
7050航空铝合金结构材料激光冲击强化处理研究 
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Research of Strengthening 7050 Aerial Aluminum Alloy Structural Material with Laser Shock Processing
激光技术 激光冲击强化处理 7050铝合金 疲劳强度 laser technique laser shock processing (LSP) 7050 aluminum alloy material fatigue strength
摘要
用自行研制的激光冲击强化处理(LSP)装置对两种重要航空铝合金结构材料7050T7451,7050T7452冲击强化试验,进行了疲劳寿命对比试验.给出了反映疲劳应力水平与结构件寿命对应关系的σm-N曲线.结果表明,在67.3 MPa的加载应力水平下,激光冲击处理后7050T7451结构材料的疲劳寿命提高到未经处理的435%,而7050T7452在81.4 MPa的应力水平下提高到518%.并对试件进行了激光冲击处理机理的研究,结果显示试件表面具有较大的残余压应力和较高的位错密度.
Abstract
Strengthening the important aerial aluminum alloy material, 7050T7451, 7050T7452 by laser shock processing (LSP) technique with the home made device. Testing the fatigue life. σ_m-N curves which show the relation of fatigue stress level and fatigue life of material were given, the result showing, after LSP, fatigue life of 7050T7451 increases to 435% of non LSP sample under 67.3 MPa stress level, fatigue life of 7050T7452 increases to 518% of non LSP sample under 81.4 stress level. Also researching the mechanism of LSP on 7050 aerial A-alloy, the result shows the surface of the test piece has biggiesh residual compressive stress, and biggish internal dislocation density.
王声波, 范勇, 吴鸿兴, 郭大浩, 戴宇生. 7050航空铝合金结构材料激光冲击强化处理研究[J]. 中国激光, 2004, 31(1): 125. 王声波, 范勇, 吴鸿兴, 郭大浩, 戴宇生. Research of Strengthening 7050 Aerial Aluminum Alloy Structural Material with Laser Shock Processing[J]. Chinese Journal of Lasers, 2004, 31(1): 125.
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