Effect of different solution heat treatments on hot ductility of superalloys Part 2-Allvac 718Plus
Journal article, 2012

The hot ductility of Allvac 718Plus for different solution heat treatments (954 degrees C-15 h, 954 degrees C-1 h, 982 degrees C-1 h and 1050 degrees C-3 h+954 degrees C-1 h) has been investigated using Gleeble testing. Substantial variations in the microstructure among the heat treatments affected the Gleeble test hot ductility only to a very limited extent. Constitutional liquation of the NbC phase was found to be the main cause for the poor ductility at high testing temperatures in the on-heating cycle as well as at the lower temperatures on-cooling. Grain boundary delta phase was seen to assist the constitutional liquation of the NbC phase. Based on established evaluation criteria for Gleeble ductility testing, a ranked indicator for weldability is suggested.

allvac 718plus

Weldability

waspaloy

Hot ductility

alloy 718

inconel

weldability

precipitation

Allvac 718Plus

Gleeble testing

cracking

Author

Joel Håkan Andersson

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Göran Sjöberg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Leif Viskari

Chalmers, Applied Physics, Microscopy and Microanalysis

Chalmers, Applied Physics, Materials Microstructure

Mahesh Chaturvedi

University of Manitoba

Materials Science and Technology

0267-0836 (ISSN)

Vol. 28 6 733-741

Subject Categories

Materials Engineering

DOI

10.1179/1743284712Y.0000000002

More information

Created

10/7/2017