High level compressive residual stresses produced in aluminum alloys by laser shock processing
High level compressive residual stresses produced in aluminum alloys by laser shock processing
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DOI：
10.1016/j.apsusc.2005.01.150
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发表时间：
2005-11-15
影响因子：
6.7
通讯作者：
Morales, M
中科院分区：
文献类型：
--
作者：
Gomez-Rosas, G;Rubio-Gonzalez, C;Morales, M
激光冲击处理（LSP）已被提出作为一种有竞争力的替代技术，以提高金属的疲劳和耐磨性的经典处理。我们提出了一种配置和结果，在水下激光照射在1064 nm的金属表面处理。用会聚透镜在10 Hz调Q Nd：YAG激光器产生的8 ns半高宽脉冲中输出1.2 J/cm（2）的激光，采用两种光斑直径：0.8和1.5 mm，给出了6061-T6铝样品中脉冲密度为2500脉冲/cm（2）和2024铝样品中脉冲密度为5000脉冲/cm（2）的结果。6061-T6铝合金和2024铝合金的残余压应力分别为-1600 MPa和-1400 MPa。它已被证明，表面残余应力水平是高于通过常规喷丸和更大的深度实现。该方法可应用于最终金属产品的表面处理。(c)2005 Elsevier B. V.保留所有权利。
Laser shock processing (LSP) has been proposed as a competitive alternative technology to classical treatments for improving fatigue and wear resistance of metals. We present a configuration and results for metal surface treatments in underwater laser irradiation at 1064 nm. A convergent lens is used to deliver 1.2J/cm(2) in a 8 ns laser FWHM pulse produced by 10 Hz Q-switched Nd:YAG, two laser spot diameters were used: 0.8 and 1.5 mm.Results using pulse densities of 2500 pulses/cm(2) in 6061-T6 aluminum samples and 5000 pulses/cm(2) in 2024 aluminum samples are presented. High level of compressive residual stresses are produced -1600 MPa for 6061-T6 Al alloy, and -1400 MPa for 2024 Al alloy. It has been shown that surface residual stress level is higher than that achieved by conventional shot peening and with greater depths. This method can be applied to surface treatment of final metal products. (c) 2005 Elsevier B.V. All rights reserved.