AZ60 마그네슘합금을 이용한 용접 공정별 접합부 특성 평가
Evaluation on the Characteristic of Connection by Welding Process Using Mg Alloy of AZ60
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
In this study, the mechanical characteristics with micro structure were analyzed on the butt joint of AZ60 magnesium material extruded by GMAW and GTAW processes. As the result of tensile test, the fracture in the welding joint area happened at both processes and seemed to be brittle fracture. The yield strength of GMAW was 84.29% and GTAW was 60.43% as compared with base metal. The yield strength of GMAW was higher 23.86% than that of GTAW. The result of decreased micro hardness was indicated at both processes. The value of minimum micro hardness in FZ at GMAW was Hv 46.7 and GTAW was Hv 43.6 as compared with base metal. The value of minimum micro hardness at GMAW process was higher 5.64 % than that at GTAW process. The size of grain boundary at GMAW process in HAZ is smaller than that at GTAW process. GMAW process is more superior than GTAW process from the productivity and quality in case of automatic welding for magnesium alloy such as the automobile seat frame.
Abstract
In this study, the mechanical characteristics with micro structure were analyzed on the butt joint of AZ60 magnesium material extruded by GMAW and GTAW processes. As the result of tensile test, the fracture in the welding joint area happened at both processes and seemed to be brittle fracture. The yield strength of GMAW was 84.29% and GTAW was 60.43% as compared with base metal. The yield strength of GMAW was higher 23.86% than that of GTAW. The result of decreased micro hardness was indicated at both processes. The value of minimum micro hardness in FZ at GMAW was Hv 46.7 and GTAW was Hv 43.6 as compared with base metal. The value of minimum micro hardness at GMAW process was higher 5.64 % than that at GTAW process. The size of grain boundary at GMAW process in HAZ is smaller than that at GTAW process. GMAW process is more superior than GTAW process from the productivity and quality in case of automatic welding for magnesium alloy such as the automobile seat frame.
참고문헌 (7)
- 이목영, "마그네슘 합금의 최신 동향 및 레이저 용접 특성", 대한용접접합학회지, 25(5), pp.29~35 (2007), 대한용접접합학회
- 임주헌, "GMAW를 이용한 V형 맞대기용접에서 와이어전극돌출길이 변화에 따른 용접 특성 연구", 한국기계기술학회지, 15(4), pp.533~538 (2013), 한국기계기술학회
- 손영산, "Al7075를 이용한 GTAW공정의 용가재에 따른 용접 건전성 평가", 한국기계기술학회지, 18(6), pp.961~966 (2016), 한국기계기술학회[DOI]
- B. C. Lim, "A study on the welding characteristics of laser cladding by fe-base bulk metallic glass", pp.2010
- M. M. Avedesian, "Magnesium and magnesium alloys" (1999), ASM specialty handbook
- 김종도, "레이저 용접조건에 따른 AZ31 마그네슘합금 맞대기 용접부의 특성", 한국마린엔지니어링학회지, 33(4), pp.517~523 (2009), 한국마린엔지니어링학회
- Y. S. Sato, "Hall-Petch relationship in friction stir welds of equal channel angular-pressed aluminium alloy", Materials Science and Engineering : A, 354(1), pp.298~305