Effect of different solution heat treatments on hot ductility of superalloys: Part 2 – Allvac 718Plus
2012 (English)In: Materials Science and Technology, ISSN 0267-0836, Vol. 28, no 6, 733-741 p.Article in journal (Refereed) Published
The hot ductility of Allvac 718Plus for different solution heat treatments (954°C–15 h, 954°C–1 h, 982°C–1 h and 1050°C–3 h+954°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 δ 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.
Place, publisher, year, edition, pages
Taylor & Francis Group, 2012. Vol. 28, no 6, 733-741 p.
Welding, heat treatment
Manufacturing, Surface and Joining Technology Metallurgy and Metallic Materials
Research subject Production Technology; ENGINEERING, Manufacturing and materials engineering
IdentifiersURN: urn:nbn:se:hv:diva-9004DOI: 10.1179/1743284712Y.0000000002OAI: oai:DiVA.org:hv-9004DiVA: diva2:900793