The Portevin–Le Châtelier Effect in a Metastable Austenitic Stainless Steel

The Portevin–Le Châtelier Effect in a Metastable Austenitic Stainless Steel

The Portevin–Le Châtelier (PLC) effect was investigated in a high-alloy metastable CrMnNi cast steel during tensile tests for the range of deformation temperatures between 293 K and 413 K (20 °C and 140 °C) and for nominal strain rates ranging between 10 −4 and 10 −1  s −1 . Analysis of the stress–s...

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Veröffentlicht in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2016, Vol.47 (1), p.59-74
Hauptverfasser: Müller, Alexandra, Segel, Christian, Linderov, Mikhail, Vinogradov, Alexei, Weidner, Anja, Biermann, Horst
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Austenitic stainless steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Diffusion
Interstitials
Materials Science
Metallic Materials
Metallurgy
Nanotechnology
Physical metallurgy
Plastic deformation
Stainless steel
Steels
Structural Materials
Surfaces and Interfaces
Symposium: CRC799 Contribution
Temperature
Thin Films
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Zusammenfassung:The Portevin–Le Châtelier (PLC) effect was investigated in a high-alloy metastable CrMnNi cast steel during tensile tests for the range of deformation temperatures between 293 K and 413 K (20 °C and 140 °C) and for nominal strain rates ranging between 10 −4 and 10 −1  s −1 . Analysis of the stress–strain curves was complemented by in situ measurements of thermal and acoustic emissions as well as by digital image correlation, enabling determination of various local characteristics of plastic flow and clarification of individual contributions of different microscopic mechanisms involved in plastic deformation. It was shown that the PLC effect in the investigated CrMnNi steel was caused by the diffusion of interstitial atoms in the bcc phases.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-015-2953-x