Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The effect of post-weld heat treatment on the notched tensile fracture of Ti–6Al–4V to Ti–6Al–6V–2Sn dissimilar laser welds
Highlights Laser welding of Ti–6Al–4V (Ti-6-4) to Ti–6A1–6V–2Sn (Ti-6-6-2) was performed. The NTS of the FZ showed the dissimilar welds were resistant to notch brittleness. A decrease in MoEQ from 4.2 to 3.3 provides coarse α +β microstructure in the FZ. The thicker α layer along the boundary in the weld promoted grain boundary sliding.
Abstract Dissimilar welding of the Ti–6Al–4V (Ti-6-4) to Ti–6A1–6V–2Sn (Ti-6-6-2) alloys was performed by CO2 laser in this work. The effect of post-weld heat treatment (PWHT) on the notched tensile strength (NTS) of the dissimilar weld was evaluated. Moreover, the results were also compared with the homogeneous laser welds with the same PWHT. Similar to the Ti-6-4 welds, the NTS of the FZ for dissimilar welds was less sensitive to PWHT conditions; the NTS of the FZ for distinct dissimilar welds fell within the range of 1060–1180MPa. The results indicated a minor rise in the Mo equivalent of the titanium alloy promoted the formation of fine α+β microstructures in the form of basket weave in the welds, which resulted in high hardness accompanied with low NTS of the welds.
The effect of post-weld heat treatment on the notched tensile fracture of Ti–6Al–4V to Ti–6Al–6V–2Sn dissimilar laser welds
Highlights Laser welding of Ti–6Al–4V (Ti-6-4) to Ti–6A1–6V–2Sn (Ti-6-6-2) was performed. The NTS of the FZ showed the dissimilar welds were resistant to notch brittleness. A decrease in MoEQ from 4.2 to 3.3 provides coarse α +β microstructure in the FZ. The thicker α layer along the boundary in the weld promoted grain boundary sliding.
Abstract Dissimilar welding of the Ti–6Al–4V (Ti-6-4) to Ti–6A1–6V–2Sn (Ti-6-6-2) alloys was performed by CO2 laser in this work. The effect of post-weld heat treatment (PWHT) on the notched tensile strength (NTS) of the dissimilar weld was evaluated. Moreover, the results were also compared with the homogeneous laser welds with the same PWHT. Similar to the Ti-6-4 welds, the NTS of the FZ for dissimilar welds was less sensitive to PWHT conditions; the NTS of the FZ for distinct dissimilar welds fell within the range of 1060–1180MPa. The results indicated a minor rise in the Mo equivalent of the titanium alloy promoted the formation of fine α+β microstructures in the form of basket weave in the welds, which resulted in high hardness accompanied with low NTS of the welds.
The effect of post-weld heat treatment on the notched tensile fracture of Ti–6Al–4V to Ti–6Al–6V–2Sn dissimilar laser welds
Hsieh, C.T. (Autor:in) / Chu, C.Y. (Autor:in) / Shiue, R.K. (Autor:in) / Tsay, L.W. (Autor:in)
25.02.2014
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2014
| British Library Online Contents | 2016
Notched Tensile Fracture of Ti-6Al-4V Laser Welds at Elevated Temperatures
| British Library Online Contents | 2012