Metallurgical Response of Electron Beam Welded Allvac® 718Plus™
Paper in 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.
Author
Joel Håkan Andersson
Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering
Göran Sjöberg
Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering
Hannu Hänninen
Aalto University
Hot Cracking Phenomena in Welds III, Ed. by T.H. Boellinghaus, J.C. Lippold, and C.E. Cross
415-428
Subject Categories
Other Materials Engineering
Areas of Advance
Materials Science
DOI
10.1007/978-3-642-16864-2-21