Browse > Article
http://dx.doi.org/10.9766/KIMST.2011.14.5.897

Analysis of Variation in the Surface Morphology of Aluminum Alloy by Repetitive Pulsed-laser Irradiation  

Choi, Sung-Ho (Hanyang University)
Kim, Chung-Seok (Hanyang University)
Jhang, Kyung-Young (Hanyang University)
Shin, Wan-Soon (ADD)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.14, no.5, 2011 , pp. 897-903 More about this Journal
Abstract
The objective of this study is to investigate the thermal behavior on material surface and the variation in the surface morphology of aluminum 6061 alloy by the Nd:YAG pulsed-laser irradiation. First, we predicted the surface temperature variation during pulsed-laser irradiation by using the two dimensional finite element analysis. When the pulsed-laser of 133 mJ energy and 5 ns pulse duration is irradiated on the surface of aluminum alloy, the material surface is thought to be melting because the surface temperature rises steadily up to about $660^{\circ}C$ exceeding the melting point. Also, the experimental results show that the solidification microstructure has been developed clearly after surface melting. Second, the diameter of melted zone was analysed by finite element analysis and measured by OM(Optical Microscopy). It increased logarithmically with increase in the number of laser irradiation. In addition, AFM(Atomic Force Microscopy) measurement showed an increase in the average surface roughness during pulsed-laser irradiation.
Keywords
Pulsed-laser; Finite Element Analysis; Heat Transfer; Diameter of Melted Zone;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Tyler, L. P., Dirk, W., Xiaochun, L., Frank, E. P. and Neil, A. D., "Pulsed Laser Polishing of Micromilled Ti6Al4V Samples", J. of Manuf. Process., Vol. 11, pp. 74-81, 2009.   DOI   ScienceOn
2 Bechtel, J. H., "Heating of Slid Targets with Laser Pulses", J. Appl. Phys., Vol. 46, No. 4, pp. 1585- 1593, 1975.   DOI   ScienceOn
3 Morsy, M. H. and Chung, S. H., "Numerical Simulation of Front Formation in Laser-induced Spark Ignition of CH4/Air Mixtures", Proc. Combust. Inst., Vol. 29, pp. 1613-1619, 2002.   DOI   ScienceOn
4 Kruapech, S. and Widjaja, J., "Laser Range Finder using Gaussian Beam Range Equation", Opt. Laser Technol., Vol. 42, pp. 749-754, 2010.   DOI   ScienceOn
5 Military Handbook MIL-HDBK-5H, "Metallic Materials and Elements for Aerospace Vehicle Structures", US Department of Defense, December 1, 1998.
6 Mannion, P. T., Magee, J., Coyne, E., O'Connor, G. M. and Glynn, T. J., "The Effect of Damage Accumulation Behaviour on Ablation Thresholds and Damage Morphology in Ultrafast Laser Micromachining of Common Metals in Air", App. Surf. Sci., Vol. 233, pp. 275-287, 2004.   DOI   ScienceOn
7 Chang, C. C., Chou, C. P., Hsu, S. N., Hsiung, G. Y. and Chen, J. R., "Effect of Laser Welding on Properties of Dissimilar Joint of Al-Mg-Si and Al-Mn Aluminum Alloys", J. Mater. Sci. Technol., Vol. 26, No. 3, pp. 276-282, 2010.
8 Billings, B. H., American Institute of Physics Handbook, McGraw-Hill, New York, pp. 6.118-6.156, 1972.
9 Kaibyshev, R., Musin, F., Gromov, D., Nieh, T. G. and Lesuer, D. R., "Effect of Liquid Phase on Superplastic Behavior of a Modified 6061 Aluminum Alloy", Scripta Mater., Vol. 47, pp. 569-575, 2002.   DOI   ScienceOn
10 Cho, S. H., Park, J. K., Kim, J. G., Chang, W. S., Choi, D. S. and Whang, K. H., "Ultra-precision Machining using a Femtosecond Laser", J. of KSPE, Vol. 27, No. 6, pp. 17-23, 2010.
11 Lim, H. T., Lee, M. H., Kim, P. K., Park, J. B. and Jeong, S. H., "Enhancement of Surface Hardness of Stainless Steel by Laser Peening", J. of KSLP, Vol. 12, No. 3, pp. 18-22, 2009.
12 Bonelli, M., Miotello, A. and Mosaner, P., "Morphological Changes Induced on Aluminum Surfaces by Excimer Laser Irradiation", App. Surf. Sci., Vol. 186, pp. 211-215, 2002.   DOI   ScienceOn