Magnesium alloys, among various non-ferrous metals, are utilized in diverse fields from the automotive industry to aerospace due to their light weight and excellent specific strength. In the previous Part I study, fiber laser BOP experiments were conducted to derive basic welding characteristics and appropriate bu竹 welding conditions. Subsequently, in the Part II experiment, butt welding was performed, and through tensile tests, hardness tests, and cross-sectional observations, it was found that at laser power of 2.0 kW and welding speed of 50 mm/s, 93% of the base metafs tensile strength and 63.4% of its elongation could be achieved. In this Part III experiment, the microstructures of the base metal and the center of the weld were observed in butt-welded specimens. Through this, laser power and welding speed, on the mechanical behavior and microstructure of magnesium alloys were analyzed

Abstract
1. 서론
2. 실험 방법
    2.1. 실험 소재 및 맞대기 용접 조건
    2.2. 인장시험 및 경도시험 조건
    2.3. 미세조직 관찰 방법
3. 실험 결과
    3.1. 인장 및 경도시험 결과
    3.2. 미세조직 관찰 결과
4. 결론
후기
References

• 김재웅(Korea Institute of Industrial Technology, Principal Researcher, Korea Institue of Industrial Technology, Researcher) | Jae-woong Kim Corresponding author
• 하을용(Korea Institue of Industrial Technology, Researcher, Dept. of Naval Architecture & Ocean Engineering, Chosun University) | Eul-yong Ha