Residual stress analysis on titanium alloy TC4 by LSP

DOI

10.2991/icsmme-15.2015.12How to use a DOI?

Keywords

Laser Shock Peening, Residual Stress, TC4 Titanium Alloy, X-Ray Diffraction

Abstract

Laser shock peening (LSP) is a new technique to reinforce the surface of materials, and the fatigue strength, wear properties and residual stress corroding properties of metallic materials would be greatly improved by shock peening. The residual compressive stress distribution caused by LSP from the surface to 500 m below the surface of the titanium alloy TC4 were measured by X-ray stress analyzer. Results indicated that there was a large residual stress on the surface of the shocked material. When the power density was 3 GW/cm2, the residual compressive stress on the surface reached 650 MPa, and it decreased gradually with the depth increased. It maintained 300 MPa when the depth was 500 m. Effect of the power density on the residual compressive stress distribution was also investigated. As the power density increased, the residual compressive stress on the surface also increased. The fatigue resistance of titanium alloy TC4 would be greatly improved.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Junhong Liu
AU  - Shuo Sun
AU  - Rui Hu
AU  - Wei Wang
AU  - Yuntao Liu
AU  - Dongfeng Chen
PY  - 2015/11
DA  - 2015/11
TI  - Residual stress analysis on titanium alloy TC4 by LSP
BT  - Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering
PB  - Atlantis Press
SP  - 49
EP  - 51
SN  - 2352-5401
UR  - https://doi.org/10.2991/icsmme-15.2015.12
DO  - 10.2991/icsmme-15.2015.12
ID  - Liu2015/11
ER  -