A Study on the Weldability of Magnesium Alloy by Laser Heat Source (Ⅱ)
- Mechanical Properties of laser-welded AZ31B-H24 and AZ31B-O - |
Jung-Han Lee*, Jong-Do Kim**, Mun-Yong Lee* |
Correspondence:
Mun-Yong Lee, Email: jdkim@hhu.ac.kr |
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Abstract |
Magnesium alloy sheet which is commercially available in the market presently is AZ31B, a Mg-Al-Zn three elements alloy. AZ31B is used by being classified into AZ31B-H24 and AZ31B-O depending on temper designation. In this study, AZ31B-H24 and AZ31B-O alloy sheets with 1.25mm thickness were butt-welded using CW Nd:YAG laser. And the effect of materials on mechanical properties was investigated by tensile and hardness tests. As a result of this study, regardless of materials, the butt-welded joint did not show a significant difference in tensile strength and hardness values. However, compared with the basemetal, the AZ31B-O showed more outstanding mechanical properties than AZ31B-H24, and that is because H24 material lost the effect of work hardening during welding. |
Key Words:
AZ31B-H24, AZ31B-O, Nd:YAG laser, Butt welding, Mechanical property |
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