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Characterization of Austenitic Stainless Steels Deformed at Elevated Temperature
Linköping University, Department of Management and Engineering, Engineering Materials.ORCID iD: 0000-0001-8306-3987
Linköping University, Department of Management and Engineering, Engineering Materials. Sandvik Materials Technology.
Linköping University, Department of Management and Engineering, Solid Mechanics.
Linköping University, Department of Management and Engineering, Engineering Materials.
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2017 (English)In: Metallurgical and Materials Transactions. A, ISSN 1073-5623, E-ISSN 1543-1940Article in journal (Refereed) In press
Abstract [en]

Highly alloyed austenitic stainless steels are promising candidates to replace more expensive nickel-based alloys within the energy-producing industry. The present study investigates the deformation mechanisms by microstructural characterization, mechanical properties and stress–strain response of three commercial austenitic stainless steels and two commercial nickel-based alloys using uniaxial tensile tests at elevated temperatures from 673 K (400 °C) up to 973 K (700 °C). The materials showed different ductility at elevated temperatures which increased with increasing nickel content. The dominating deformation mechanism was planar dislocation-driven deformation at elevated temperature. Deformation twinning was also a noticeable active deformation mechanism in the heat-resistant austenitic alloys during tensile deformation at elevated temperatures up to 973 K (700 °C).

Place, publisher, year, edition, pages
2017.
Keyword [en]
Austenitic stainless steel, Nickel-based alloy, Microstructural characterization, Deformation twinning, Stress-strain response
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:liu:diva-139467DOI: 10.1007/s11661-017-4212-9OAI: oai:DiVA.org:liu-139467DiVA: diva2:1128566
Funder
Swedish Energy Agency, KME-701
Available from: 2017-07-26 Created: 2017-07-26 Last updated: 2017-07-26

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