Effect of Multiple Laser Shock Peening without Coating on Al-2024-O Alloy for Automotive Applications

<- Back to I. Materials Science Vol. 9 Iss. 2

Cite the paper

Yash Jain, Sandeep Varin, S. Prabhakaran, S. Kalainathan (2017). Effect of Multiple Laser Shock Peening without Coating on Al-2024-O Alloy for Automotive ApplicationsMechanics, Materials Science & Engineering, Vol 9. doi:10.2412/mmse.65.57.424

Authors: Yash Jain, Sandeep Varin, S. Prabhakaran, S. Kalainathan

ABSTRACT. The present work discusses the influence of surface compressive residual stress induced by multiple laser shock peening without coating process using low energy Nd: YAG laser with the fundamental wavelength. Laser shock peening without absorbent coating (LSPwC) was employed to Al-2024 in order to improve its surface microstructure and mechanical properties. The compressive residual stress measurements are accomplished according to X-ray diffraction sin2Ψ method. The surface morphology and roughness analysis were carried out using atomic force microscope and roughness profilometer respectively. Also, the microstructure analysis was performed using an optical microscope and scanning electron microscope. The Vickers micro-hardness revealed the improvement of surface and sub-surface hardness after multiple laser shock peening without coating process using low energy laser.

Keywords: Laser shock peening without coating (LSPwC), Hardness, X-ray diffraction, Roughness, Residual Stress, Surface Morphology.

DOI 10.2412/mmse.65.57.424

References

[1] Sathyajith, S., S. Kalainathan, and S. Swaroop. “Laser peening without coating on aluminum alloy Al-6061-T6 using low energy Nd: YAG laser.” Optics & Laser Technology 45 (2013): 389-394.

[2] Kalainathan, S., and S. Prabhakaran. “Recent development and future perspectives of low energy laser shock peening.” Optics & Laser Technology 81 (2016): 137-144.

[3] Prabhakaran, S., and S. Kalainathan. “Compound technology of manufacturing and multiple laser peening on microstructure and fatigue life of dual-phase spring steel.” Materials Science and Engineering: A 674 (2016): 634-645.

[4] Fu Zhao, William Z. Bernstein a “Environmental assessment of laser assisted manufacturing: case studies on laser shock peening and laser assisted turning” Journal of Cleaner Production 18 (2010) 1311e1319.

[5] L. Zhang, J.Z. Lu, “Effects of different shocked paths on fatigue property of 7050-T7451 aluminium alloy during two-sided laser shock processing” Materials and Design 32 (2011) 480–486.

[6] S. Baragetti, G. D Urso, “Aluminium 6060-T6 friction stir welded butt joints: fatigue resistance with different tools and feed rates” Journal of Mechanical Science and Technology 28 (3) (2014) 867~877.

[7] Omar Hatamleh, Jed Lyons, “Laser and shot peening effects on fatigue crack growth in friction stir welded 7075-T7351 aluminium alloy joints” International Journal of Fatigue 29 (2007) 421–434.

https://mmse.xyz/Papers/vol-9-2017/part2/ID2017032411.pdf

Creative Commons Licence
Mechanics, Materials Science & Engineering Journal by Magnolithe GmbH is licensed under a Creative Commons Attribution 4.0 International License.
Based on a work at www.mmse.xyz.