Influence of the High-Temperature Mechanical Loading Mode on the Flow Behavior and Microstructural Evolution of a Nb-Stabilized Austenitic Stainless Steel

• Published in: Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2022-02, Vol.53 (2), p.610-626
• Main Authors: Cliche, N., Ringeval, S., Georges, E., Bellus, J., Petit, P., Cortial, F., Heuzé, J.-L., Gourgues-Lorenzon, A.-F.
• Format: Article
• Language: English
• Subjects: Austenitic stainless steels; Characterization and Evaluation of Materials; Chemistry and Materials Science; Criteria; Deformation effects; Engineering Sciences; High temperature; Materials; Materials Science; Metallic Materials; Nanotechnology; Niobium; Original Research Article; Plane strain; Solid solutions; Stainless steel; Stress-strain curves; Structural Materials; Surfaces and Interfaces; Thin Films; Yield strength
• ISSN: 1073-5623; 1543-1940
• DOI: 10.1007/s11661-021-06536-7

The present work addresses the effect of three high-temperature deformation modes, namely, torsion, uniaxial compression, and plane strain compression, on flow stress vs. strain curves, as well as on post-dynamic and static recrystallization of 316Nb austenitic stainless steel. Using a Hosford criterion instead of the classical von Mises criterion enables a unified description of the stress–strain curves obtained under different loading modes. This work also revealed that the loading mode had no significant effect on post-dynamic and static recrystallization phenomena. The amount of niobium atoms in solid solution might be preponderant in the control of recrystallization of 316Nb.