반복적인 펄스레이저 조사에 의한 알루미늄 합금의 표면상태 변화분석
- Title
- 반복적인 펄스레이저 조사에 의한 알루미늄 합금의 표면상태 변화분석
- Other Titles
- Analysis of Variation in the Surface Morphology of Aluminum Alloy by Repetitive Pulsed-laser Irradiation
- Author
- 장경영
- Keywords
- 펄스레이저; 유한 요소법; 열전달; 용융지름; Pulsed-laser; Finite Element Analysis; Heat Transfer; Diameter of Melted Zone
- Issue Date
- 2011-10
- Publisher
- 한국군사과학기술학회
- Citation
- 한국군사과학기술학회지, 2011, 14(5), P.897-903
- 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.
- URI
- http://koreascience.or.kr/article/ArticleFullRecord.jsp?cn=GSGGBW_2011_v14n5_897
- ISSN
- 1598-9127
- DOI
- 10.9766/KIMST.2011.14.5.897
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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