| Title |
Special Edition : Symposium on Mechanical Behavior of Materials(1) ; Microstructure Analysis for TMAZ of Surface Friction Welded Al alloys |
| Authors |
강석훈(Suk Hoon Kang); 장형준; 오규환(Kyu Hwan Oh); 한흥남(Heung Nam Han); 이창길(Chang Gil Lee); 김성준(Sung Joon Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Surface Fraiction Welding; SFW; Al sheet; Microtexture; EBSD |
| Abstract |
Microstructural characteristics of Al sheets joined by a butt welding process named as surface friction weldding (SFW) were analyzed. The SFWed Al alloys were examined by an electron backscattering diffraction (EBSD) installed in field emission-scanning electron microscopy (FE-SEM). The microstructure of welded area consists of dynamically recrystallized zone (DXZ), thermomechanically affected zone (TMAZ), and base metal (BM). A fine-grained microstructure was observed in DXZ. Especially, large number of low angle grain boundaries were observed in TMAZ. Based on the low angle boundary distributions, the shape of DXZ and TMAZ in weld zone could be obviously distinguished. The crystallographic texture observed at weld zone in a SFWed Al alloy sheet resembles that of ideal simple shear texture in FCC metals. This suggests that the predominant deformation in SFW is simple shear. |