Enhanced ductility in dynamic strain aging regime in a Fe-25Ni-20Cr austenitic stainless steel

Enhanced ductility in dynamic strain aging regime in a Fe-25Ni-20Cr austenitic stainless steel

Contrary to the commonly observed embrittlement during dynamic strain aging, we report in this note distinct enhancement in ductility in a Nb-containing and nitrogen stabilized Fe-25(wt%)Ni-20Cr austenitic stainless steel (Alloy 709) at temperatures from 623 K to 873 K at 10−4 s−1 where serrated flo...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2018-06, Vol.729 (C), p.157-160
Hauptverfasser: Alomari, Abdullah S., Kumar, N., Murty, K.L.
Format: Artikel
Sprache:eng
Schlagworte:
Austenitic stainless steel
Austenitic stainless steels
Austenitic steels
Deformation
Ductility
Dynamic strain aging
Elongation
Hardening rate
High temperature deformation
High temperature physics
Iron
Nickel chromium alloys
Niobium
Parameter sensitivity
Precipitation hardening
Strain hardening
Strain rate
Strain rate sensitivity
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Zusammenfassung:Contrary to the commonly observed embrittlement during dynamic strain aging, we report in this note distinct enhancement in ductility in a Nb-containing and nitrogen stabilized Fe-25(wt%)Ni-20Cr austenitic stainless steel (Alloy 709) at temperatures from 623 K to 873 K at 10−4 s−1 where serrated flow is noted. This observation is rationalized in terms of the influence of strain hardening parameters and strain rate sensitivity on uniform elongation and ductility respectively.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2018.05.060