作者: T. Shariff , X. Cao , R. R. Chromik , P. Wanjara , J. Cuddy
DOI: 10.1007/S10853-011-5866-0
关键词: Alloy 、 Orthorhombic crystal system 、 Joint (geology) 、 Flip chip 、 Microstructure 、 Materials science 、 Metallurgy 、 Porosity 、 Martensite 、 Welding 、 Composite material
摘要: Ti–5Al–5V–5Mo–3Cr (Ti-5553) sheets were welded using a Nd: YAG laser system and Ti–6Al–4V filler wire. The effect of joint gap on weld geometry, defects, microstructure, hardness was investigated. Fully penetrated welds up to 0.5 mm produced. two main defects observed porosity underfill. addition wire reduced underfill but increased porosity, especially at large gaps. fusion zone (FZ) microstructure low gaps consisted retained β with dendritic morphology. At 0.3 mm, regions orthorhombic α″ martensite in the which proportion as from volume percentage 4.9% 44% mm. Despite differences increasing gap, FZ remained relatively constant for all evaluated.