Effect of different solution heat treatments on hot ductility of superalloys Part 2-Allvac 718Plus
Artikel i vetenskaplig tidskrift, 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

Författare

Joel Håkan Andersson

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Göran Sjöberg

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Leif Viskari

Chalmers, Teknisk fysik, Mikroskopi och mikroanalys

Chalmers, Teknisk fysik, Materialens mikrostruktur

Mahesh Chaturvedi

University of Manitoba

Materials Science and Technology

0267-0836 (ISSN)

Vol. 28 6 733-741

Ämneskategorier

Materialteknik

DOI

10.1179/1743284712Y.0000000002

Mer information

Skapat

2017-10-07