Laser Solutions (한국레이저가공학회지)

Korean Society of Laser Processing (한국레이저가공학회)
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A Study on the Welding Behavior of A3003 Aluminium Alloy Thin Sheet by Nd : YAG Laser Beam

박판 A3003 Al합금의 Nd : YAG 레이저빔 용접에 관한 연구

  • 허인석 (연세대학교 재료공학부) ;
  • 김병철 (연세대학교 재료공학부) ;
  • 김도훈 (연세대학교 재료공학부) ;
  • 김진수 (삼성 SDI㈜ 기술본부 기술응용 TF) ;
  • 이한용 (삼성 SDI㈜ 기술본부 기술응용 TF)
  • Published : 2001.04.01
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Abstract

This work was carried out to investigate the welding behavior of thin A3003 Al alloy sheets by Nd : YAG laser beam. Considering bead shape and mechanical properties, the laser pulse shapes selected were two kinds of 2-division and 3-division by varying power level and pulse duration. In order to obtain optimum conditions, the factorial design method and central composite design method were applied. Tensile test, optical microscopy, micro hardness test and TEM analysis were performed. Due to the annealing caused by thermal effect during laser welding, precipitates were coarsended. The HAZ was softened and failed during tensile test. The hardness of HAZ was lower than that of base metal, since the heat input relieved the work hardening effect and caused grain growth.

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