Characterization of Austenitic Stainless Steels Deformed at Elevated Temperature |
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Authors: | Mattias Calmunger Guocai Chai Robert Eriksson Sten Johansson Johan J Moverare |
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Affiliation: | 1.Division of Engineering Materials, Department of Management and Engineering,Link?ping University,Link?ping,Sweden;2.AB Sandvik Materials Technology R&D Center,Sandviken,Sweden;3.Division of Solid Mechanics, Department of Management and Engineering,Link?ping University,Link?ping,Sweden |
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Abstract: | 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 \(^{\circ }\)C) up to 973 K (700 \(^{\circ }\)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 \(^{\circ }\)C). |
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