마그네슘 합금의 레이저 용접성에 관한 기초 연구(Part III : 기계물성 및 미세조직 특성)
A Basic Study on the Laser Weldability of Magnesium Alloys(Part III: Mechanical Properties and Microstructural Characteristics)
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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 butt 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 metal's 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
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 butt 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 metal's 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
참고문헌 (7)
- Lee, M. Y, "Trends in Application of Magnesium Alloy and Its Welding Characteristics with Laser", J. Weld. Join, 25(5), pp.29~35 (2007)
- Kulekci M. K, "Magnesium and its alloys applications in automotive industry", The International Journal of Advanced Manufacturing Technology, 39(9), pp.851~865 (2008)
- Lee, "Recent Trends in Welding of Magnesium Alloy", J. Weld. Join Conference, pp.111~117 (2012)
- Kim, Y. H, "A Basic Study on the Laser Weldability of Magnesium Alloys(Part I : Analaysis of the Influence of Laser Power and Welding Speed)", Korean Society of Mechanical Technology, 25(6), pp.992~998 (2023)
- Ha, E. Y, "A Basic Study on the Laser Weldability of Magnesium Alloys(Part III : Analaysis of Laser Butt Welding Conditions)", Korean Society of Mechanical Technology, 25(6), pp.992~998 (2023)
- L. D. Scintilla, "Nd : YAG laser weldability and mechanical properties of AZ31 magnesium alloy butt joints", Journal of Materials Processing Technology, 210, pp.15~ (2010)
- J. Zhu, "CO2 and diode laser welding of AZ31 magnesium alloy", Applied Surface Science, 247(1), pp.300~306 (2005)