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Effect of different solution heat treatments on hot ductility of superalloys: Part 2 – Allvac 718Plus
University West, Department of Engineering Science, Division of Manufacturing Processes. Department of Materials Technology, Volvo Aero Corporation, Trollhättan, Sweden and Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden. (PTW)ORCID iD: 0000-0001-9065-0741
Department of Materials Technology, Volvo Aero Corporation, Trollhättan, Sweden and Department of Materials and Manufacturing Technology, Chalmers University of Technology, Gothenburg, Sweden.
Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden.
Department of Mechanical and Industrial Engineering, University of Manitoba, Winnipeg, MB, Canada.
2012 (English)In: Materials Science and Technology, ISSN 0267-0836, Vol. 28, no 6, 733-741 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Welding, heat treatment
National Category
Manufacturing, Surface and Joining Technology Metallurgy and Metallic Materials
Research subject
Production Technology; ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-9004DOI: 10.1179/1743284712Y.0000000002OAI: oai:DiVA.org:hv-9004DiVA: diva2:900793
Available from: 2016-02-05 Created: 2016-02-05 Last updated: 2016-02-10Bibliographically approved

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