Journal
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Volume 48A, Issue 10, Pages 4525-4538Publisher
SPRINGER
DOI: 10.1007/s11661-017-4212-9
Keywords
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Funding
- AB Sandvik Materials Technology in Sweden
- Swedish National Energy Administration through the Research Consortium of Materials Technology for Thermal Energy Processes [KME-701]
- AFM Strategic Faculty Grant SFO-MAT-LiU at Linkoping University [2009-00971]
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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).
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