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

被引:7
|
作者
van Staden, S. N. [1 ,2 ]
Polese, C. [1 ,2 ]
Glaser, D. [3 ]
Nobre, J. -P. [1 ,2 ]
Venter, A. M. [2 ,4 ]
Marais, D. [4 ]
Okasinski, J. [5 ]
Park, J. -S. [5 ]
机构
[1] Univ Witwatersrand, Sch Mat Ind & Aeronaut Engn, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa
[2] Univ Witwatersrand, DST NSF Ctr Excellence Strong Mat, 1 Jan Smuts Ave, ZA-2000 Johannesburg, South Africa
[3] CSIR, Natl Laser Ctr, Meiring Naude Rd, ZA-0184 Pretoria, South Africa
[4] Necsa SOC Ltd, Res & Dev Div, R104 Pelindaba, ZA-0240 Pretoria, South Africa
[5] Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Lemont, IL 60439 USA
来源
MECHANICAL STRESS EVALUATION BY NEUTRON AND SYNCHROTRON RADIATION, MECA SENS 2017 | 2018年 / 4卷
基金
新加坡国家研究基金会;
关键词
Laser Shock Peening; Aluminium; Residual Stress; Incremental Hole Drilling; X-ray Diffraction; Synchrotron; Energy-Dispersive; Neutron Diffraction;
D O I
10.21741/9781945291678-18
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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 mu m, but substantially large stresses existed at 50 mu m. This investigation strongly motivated why residual stress profiles should be obtained using a variety of techniques.
引用
收藏
页码:117 / 122
页数:6
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