Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Micro-Shockwave Measurement and Evaluation of Laser Shock Peening

레이저 쇼크 피닝의 마이크로 충격파 측정 및 평가

  • Kim, Joo-Han (Dept. of Mechanical Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Lee, Woo-Ram (Graduate School of NID Fusion Technology, Nano-IT Program, Seoul Nat'l Univ. of Science and Technology) ;
  • Kim, Teak-Gu (Graduate School of NID Fusion Technology, Nano-IT Program, Seoul Nat'l Univ. of Science and Technology) ;
  • Cheong, Seong-Kyun (Dept. of Mechanical Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 김주한 (서울과학기술대학교 기계공학과) ;
  • 이우람 (서울과학기술대학교 NID 융합기술대학원 나노 IT 융합프로그램) ;
  • 김택구 (서울과학기술대학교 NID 융합기술대학원 나노 IT 융합프로그램) ;
  • 정성균 (서울과학기술대학교 기계공학과)
  • Received : 2011.05.23
  • Accepted : 2011.07.25
  • Published : 2011.10.01
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Abstract

Micro shockwaves are induced in laser shock peening and their effect on metal samples is presented. Laser shock peening produces maximized internal compressive stress on metal surfaces. This research evaluated the effects of micro shockwaves from laser shock peening with a pulsed Nd:YAG laser on steel samples, through the analysis of the mechanical properties of the samples. In the experiments, a piezo material was applied to measure the micro shockwaves and the hardnesses and micro tensile strengths of the samples were evaluated.

본 연구에서는 레이저 쇼크 피닝으로부터 생성되는 마이크로 충격파를 정량적으로 측정하고 그 특성을 분석하였다. 레이저 쇼크 피닝은 금속 재료에서 압축 응력을 생성시키며 그 크기가 표면에서 극대화되는 특징을 가지고 있다. 펄스 Nd:YAG 레이저를 이용하여 스틸표면에 피닝 공정을 수행하였고 이에 따른 마이크로 충격파의 정량화 및 재료의 기계적 성질 변화에 대해 평가하였다. 실험적 접근으로 피에조소자를 사용하였으며 이를 통한 실제 충격파의 정량화를 제시하였다. 또한 재료 구조 특성, 재료 강도, 인장 시험 등의 기계적 특성을 분석하였다.

Keywords

References

  1. Hu, Y., Yao, Z. and Hu, J., 2006, "3-D FEM Simulation of Laser Shock Processing," Surface & Coatings Technology, 201. 201, Issues 3-4, pp. 1426-1435. https://doi.org/10.1016/j.surfcoat.2006.02.018
  2. Rhee, H. W. and Park, Y. S., 2004, "Distribution Characteristics of Residual Compressive Stresses Induced by Shot-peening in the Aircraft Structural Material," Journal of the Korean Society of Precision Engineering Vol. 21, No. 5, pp. 149-156.
  3. Zhang, Y. K., Ren, X. D., Zhou, J. Z., Lu. J. Z. and Zhou, L. C., 2009, "Investigation of the Stress Intensity Factor Changing on the Hole Crack Subject to Laser Shock Processing," Material and Design, 30., Vo. 30, Issues 7, pp. 2769-2773 https://doi.org/10.1016/j.matdes.2008.09.033
  4. Montross, C. S., Wei, T., Ye, L., Clark, G. and Mai, Y. W., 2002, "Laser Shock Processing and Its Effects on Microstructure and Properties of Metal Alloys: a Review," International Journal of Fattigue 24, Vol.24, Issues 10, pp. 1021-1036. https://doi.org/10.1016/S0142-1123(02)00022-1
  5. Yang, S. Y., Choi, S. D., Kim, G. M., Jun, J. M. and Gong, B. C., 2010, "Characteristics of Strengthening for Thin Metals by Laser Beam," Journal of Korean Society of Machine Tool Engineers, Vol. 19, No. 2, pp. 216-223.
  6. Rubio-Gonzalez, C., Gomez-Rosas, G., Ocana, J. L., Molpeceres, C., Banderas, A., Porro, J. and Morales, M., 2006, "Effect of an Absorbent Overlay on the Residual Stress Field Induced by Laser Shock Processing on Aluminum Samples," Surface Science, Vol. 52, Issues 18, pp. 6201-6205.
  7. Lu, J. Z., Zhang, L., Feng, A. X., Jinag, Y. F. and Cheng, G. G., 2009, "Effects of Laser Shock Processing on Mechanical Properties of Fe-Ni Alloy," Material and Design 30, Vol. 30, Issues 9, pp. 5-8.
  8. Braisted, W. and Brockman, R, 1999, "Finite Element Situation of Laser Shock Peening," International Journal of Fatigue 21, Vol. 21, Issues 7, pp. 719-724. https://doi.org/10.1016/S0142-1123(99)00035-3
  9. Hammersley, G., Hackel, L. A. and Harris, F., 2000, "Surface Prestressing to Improve Fatigue Strength of Components by Laser Shot Peening," Optics and Laser in Engineering, Vol. 34, Issues 4-6, pp. 327-337. https://doi.org/10.1016/S0143-8166(00)00083-X
  10. Yang. J. M., Her, Y. C., Han, N. and Clauer, A., 2001, "Laser Shock Peening on Fatigue Behavior of 2024- T3 Al Alloy with Fastener Hole and Stopholes," Material Science and Engineering, Vol. 298, Issues 1- 2, pp. 296-299. https://doi.org/10.1016/S0921-5093(00)01277-6
  11. Chung, C. M., Baik, S. H., Kim, J. S. and Lee, S. B., 2008, "The Laser Peening Effect for Improving the Surface Properties of Metal," Journal of KSLP, Vol. 11, No. 3, pp. 5-8.
  12. Kim, T. G., Cheong, S. K., Kim, J, H. and Song, C. S., 2009, "A Study on Improvement of Surface Properties for Titanium Alloy Using Laser-Induced Shock Waves," The Korean Society of Machine Tool Engineers Autumn Conference 2009, pp. 226-230.
  13. Scruby, C. B. and Drain, L. E., 1990, Laser Ultrasonics, Adam Hilger, New York, pp. 81-89.
  14. Hatamleh, O., Lyons, J. and Forman, R. H., 2007, "Laser and Shot Peening Effects on Fatigue Crack Growth in Friction Stir Welded 7075-T7351 Aluminum Alloy Joint," International of Journal of Fatigue 29, Vol. 29, Issues 3, pp. 421-434. https://doi.org/10.1016/j.ijfatigue.2006.05.007
  15. Choi, E. Y., Bhang, B. W., Son, S. K. and Cho, C. D., 2009, "A Study on Residual Stress for Al6061 Alloy by Laser Plasma Shock Peening (LPSP) Process," The Korean Society of Mechanical Engineers Spring Conference 2009, pp. 552-556.
  16. Celliers, P. M., Collins, G. W., Da Silva, L. B., Gold, D. M. and Cauble, R., "Accurate Measurement of Laser-Driven Shock Trajectories with Velocity Interferometry," Applied Physics Letters Vol. 73, No. 10, pp.1320-1322.
  17. Park, H. K., Kim, D., Grigoropoulos, C. P., Tam, A. C., 1996, " Pressure Generation and Measurement in the Rapid Vaporization of Water on a Pulsed Laser Heated Surface," Vol. 80, Issue 7, pp. 4072 - 4081. https://doi.org/10.1063/1.363370
  18. Martí-Lopez, L., Ocana, R., Pineiro, E., Asensio, A., 2011, "Laser Peening Induced Shock Waves and Cavitation Bubbles in Water Studied by Optical Schlieren Visualization," Original Research Article Physics Procedia, Vol 12, pp. 442-451.
  19. Hecht, E., 2001, Optics, Addison Wesley, 2001, USA, pp. 56-58.
  20. Park, J. H., 2005, "The Next Generation Nano Shape Measurement System-AFM," Journal of the KSME, Vol. 45, No. 3, pp. 44-48.
  21. Baek, S. H., Cho, S. S. and Joo, W. S., 2009, "Response Surface Approximation for Fatigue Life Predictionand Its Application to Multi-Criteria Optimization With a Priori Perference Information," Trans. Of the KSME(A) Vol. 33, No.2, pp. 114-126.