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Title: Measurement of Residual Stresses in Different Thicknesses of Laser Shock Peened Aluminium Alloy Samples

Abstract

This study focused on depth-resolved residual stress results determined with a number of complementary techniques on Laser Shock Peening (LSP) treated aluminium alloy 7075-T651 samples with different thicknesses (6 mm and 1.6 mm). Samples were prepared from a single commercially produced rolled plate that was then treated with LSP. Residual stresses were measured using Laboratory X-Ray Diffraction (LXRD), Incremental Hole Drilling (IHD), Neutron Diffraction (ND) and Synchrotron XRD (SXRD). The LSP treatment resulted in the establishment of compressive residual stresses that varied rapidly in the near surface region. The compressive stresses extended up to 1.5 mm in depth in the 6 mm thick sample. Some surface stress relaxation was observed in the first 25 μm, but substantially large stresses existed at 50 mu m. Finally, this investigation strongly motivated why residual stress profiles should be obtained using a variety of techniques.

Authors:
 [1];  [1];  [2];  [1];  [3];  [4];  [5];  [5]
  1. Univ. of the Witwatersrand, Johannesburg (South Africa). School of Mechanical, Industrial and Aeronautical Engineering, and DST-NRF Centre of Excellence in Strong Materials
  2. CSIR National Laser Centre, Pretoria (South Africa)
  3. Univ. of the Witwatersrand, Johannesburg (South Africa). DST-NRF Centre of Excellence in Strong Materials; Necsa SOC Limited, Pretoria (South Africa). Research and Development Division
  4. Necsa SOC Limited, Pretoria (South Africa). Research and Development Division
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Research Foundation (NRF) South Africa; USDOE
OSTI Identifier:
1473668
Grant/Contract Number:  
[AC02-06CH11357; 109200; 115195]
Resource Type:
Accepted Manuscript
Journal Name:
Materials Research Proceedings
Additional Journal Information:
[ Journal Volume: 4]; Journal ID: ISSN 2474-395X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; aluminium; energy-dispersive; incremental hole drilling; laser shock peening; neutron diffraction; residual stress; synchrotron; x-ray diffraction

Citation Formats

van Staden, Sean N., Polese, Claudia, Glaser, Daniel, Nobre, Joao-Paulo, Venter, Andrew M., Marais, Deon, Okasinksi, John, and Park, Jun-Sang. Measurement of Residual Stresses in Different Thicknesses of Laser Shock Peened Aluminium Alloy Samples. United States: N. p., 2018. Web. doi:10.21741/9781945291678-18.
van Staden, Sean N., Polese, Claudia, Glaser, Daniel, Nobre, Joao-Paulo, Venter, Andrew M., Marais, Deon, Okasinksi, John, & Park, Jun-Sang. Measurement of Residual Stresses in Different Thicknesses of Laser Shock Peened Aluminium Alloy Samples. United States. doi:10.21741/9781945291678-18.
van Staden, Sean N., Polese, Claudia, Glaser, Daniel, Nobre, Joao-Paulo, Venter, Andrew M., Marais, Deon, Okasinksi, John, and Park, Jun-Sang. Fri . "Measurement of Residual Stresses in Different Thicknesses of Laser Shock Peened Aluminium Alloy Samples". United States. doi:10.21741/9781945291678-18. https://www.osti.gov/servlets/purl/1473668.
@article{osti_1473668,
title = {Measurement of Residual Stresses in Different Thicknesses of Laser Shock Peened Aluminium Alloy Samples},
author = {van Staden, Sean N. and Polese, Claudia and Glaser, Daniel and Nobre, Joao-Paulo and Venter, Andrew M. and Marais, Deon and Okasinksi, John and Park, Jun-Sang},
abstractNote = {This study focused on depth-resolved residual stress results determined with a number of complementary techniques on Laser Shock Peening (LSP) treated aluminium alloy 7075-T651 samples with different thicknesses (6 mm and 1.6 mm). Samples were prepared from a single commercially produced rolled plate that was then treated with LSP. Residual stresses were measured using Laboratory X-Ray Diffraction (LXRD), Incremental Hole Drilling (IHD), Neutron Diffraction (ND) and Synchrotron XRD (SXRD). The LSP treatment resulted in the establishment of compressive residual stresses that varied rapidly in the near surface region. The compressive stresses extended up to 1.5 mm in depth in the 6 mm thick sample. Some surface stress relaxation was observed in the first 25 μm, but substantially large stresses existed at 50 mu m. Finally, this investigation strongly motivated why residual stress profiles should be obtained using a variety of techniques.},
doi = {10.21741/9781945291678-18},
journal = {Materials Research Proceedings},
number = ,
volume = [4],
place = {United States},
year = {2018},
month = {4}
}

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