| 7050航空铝合金结构材料激光冲击强化处理研究 |
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| 引用本文： | 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): 25-128 |
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| 作者姓名： | 王声波 范勇 吴鸿兴 郭大浩 戴宇生 |
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| 作者单位： | 中国科学技术大学强激光技术研究所 安徽合肥230026(王声波，范勇，吴鸿兴，郭大浩)，中国科学技术大学强激光技术研究所 安徽合肥230026(戴宇生) |
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| 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67．3MPa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81．4MPa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。
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| 关 键 词： | 激光技术 激光冲击强化处理 7050铝合金 疲劳强度 航空材料 结构材料 |
| 收稿时间： | 2002-08-12 |
Research of Strengthening 7050 Aerial Aluminum Alloy Structural Material with Laser Shock Processing |
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| WANG Sheng-bo,FAN Yong,WU Hong-xing,GUO Da-hao,DAI Yu-sheng. Research of Strengthening 7050 Aerial Aluminum Alloy Structural Material with Laser Shock Processing[J]. Chinese Journal of Lasers, 2004, 31(1): 25-128 |
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| Authors: | WANG Sheng-bo FAN Yong WU Hong-xing GUO Da-hao DAI Yu-sheng |
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| 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. |
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| Keywords: | laser technique laser shock processing (LSP) 7050 aluminum alloy material fatigue strength |
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