Characterization of Austenitic Stainless Steels Deformed at Elevated TemperatureReport as inadecuate

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Metallurgical and Materials Transactions A

pp 1–14

First Online: 17 July 2017Received: 30 September 2016


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.

Manuscript submitted September 30, 2016.

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Author: Mattias Calmunger - Guocai Chai - Robert Eriksson - Sten Johansson - Johan J. Moverare


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