论文

EXPERIMENTAL RESEARCH ON LASER SHOCK WAVE LOADING MECHANISM OF 2024 ALUMINUM ALLOY SHEET

  • FENG Ai-Xin ,
  • ZHE Gui-Feng ,
  • CAO Yu-Peng ,
  • ZHOU Peng-Cheng ,
  • LI Ban ,
  • YI Fen
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  • 1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013
    2. School of Mechanical Engineering, Wenzhou University, Wenzhou 325035
    3. School of Mechanical Engineering, Nantong University, Nantong 226019

Received date: 2011-09-15

  Revised date: 2011-12-15

  Online published: 2012-02-11

Supported by

Supported by National Science Foundation of China (No.51175237), China Postdoctoral ScienceFoundation (No.20100481096), Postdoctoral Science Foundation of Jiangsu Province (No.1002029C) and Senior Start Funds of Jiangsu University (No.09JDG090)

Abstract

2024 aluminum alloy sheets with three different thicknesses were shocked by means of a single laser shock processing. Static and dynamic strain signals from the strain gauges on the back of the target were measured by STSS–1 stress test module. Residual stresses of target surfaces were measured by XRD. The loading model by the laser shock waves in 2024 aluminium alloy sheets was established, the stress wave propagations and stress wave structures inside the targets were described, and the reasons of generating residual tensile stress in the impact areas were explained. The results indicate that laser shock waves reflected and transmitted have different properties and intensities at the different places of target surfaces. When the laser power density is far beyond the best power density range of 2024 aluminum alloy and the target material is thin enough, the tensile residual stresses are generated.

Cite this article

FENG Ai-Xin , ZHE Gui-Feng , CAO Yu-Peng , ZHOU Peng-Cheng , LI Ban , YI Fen . EXPERIMENTAL RESEARCH ON LASER SHOCK WAVE LOADING MECHANISM OF 2024 ALUMINUM ALLOY SHEET[J]. Acta Metall Sin, 2012 , 48(2) : 205 -210 . DOI: 10.3724/SP.J.1037.2011.00577

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