Metallurgical Response of Electron Beam Welded Allvac® 718Plus™
Paper i proceeding, 2011
Electron beam welding of forged Allvac 718Plus superalloy has been carried out without any visible cracks in weld cross-sections. Healed cracks in the heat affected zone were, however, seen in most cross-sections with the healing as well as the cracking believed to be due to the constitutional liquation of the δ-phase. The δ-phase undergoes constitutional liquation in the Heat Affected Zone (HAZ) and consequently decreases the ductility of the material and renders cracks in the HAZ but due to the large amount of eutectic liquid produced at the same time the healing of the opened cracks takes place.
Författare
Joel Håkan Andersson
Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik
Göran Sjöberg
Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik
Hannu Hänninen
Aalto-Yliopisto
Hot Cracking Phenomena in Welds III, Ed. by T.H. Boellinghaus, J.C. Lippold, and C.E. Cross
415-428
Ämneskategorier
Annan materialteknik
Styrkeområden
Materialvetenskap
DOI
10.1007/978-3-642-16864-2-21