Microstructure and Texture Characterization in Nd:yag Laser Welds of 5A90 Aluminium-Lithium Alloy
Microstructure and texture characterization in Nd:YAG laser welds of 5A90 Aluminium-Lithium (Al-Li) alloy were studied by means of optical microscope (OM), electron back scattered diffraction (EBSD) and transmission electron microscope (TEM). The solidification structure, misorientation angle, dislocation density and texture of the welds in 5A90 Al-Li alloy were investigated and compared with the unaffected base metal. It was revealed that microstructure and texture changes of the 5A90 Al-Li alloy after laser welding. The solidification structure results show that a zone of equiaxed grains (EQZ) along the fusion boundary is formed and the weld metal exhibits entirely equiaxed dendritic grains for 5A90 Al-Li alloy. EBSD study clearly shows the high angle boundaries (>15) and texture changes for 5A90 Al-Li alloy after laser welding. TEM images indicate that the laser welding has no influence on the dislocation density.
laser welding al-li alloy microstructure texture ebsd
L.Cuia X.Y.Li D.Y.He L.Chen S.L.Gong
School of Material Science and Engineering, Beijing University of Technology, Beijing, P.R.China Science and Technology on Power Beam Processes Laboratory, Beijing Aeronautical Manufacturing Techno
国际会议
北京
英文
38-42
2010-10-25（万方平台首次上网日期，不代表论文的发表时间）