Influence of martensite formed during deformation on the mechanical behavior of Fe-Ni-C Alloys

Autor:	Alfred Goldberg, P. C. Maxwell, John C. Shyne
Rok vydání:	1974
Předmět:	Austenite Materials science Bainite Martensite Metastability Metallurgy General Engineering Atmospheric temperature range Deformation (engineering) Flow stress Ductility
Zdroj:	Metallurgical transactions. 5:1319-1324
ISSN:	2379-0083 0026-086X
DOI:	10.1007/bf02646614
Popis:	Tension tests were performed on metastable austenitic Fe-Ni-C alloys to study the influence of martensite formed during straining on mechanical behavior. Although both stressassisted, plate martensite and fine, lathlike strain-induced martensite were formed, only stress-assisted martensite occurred in sufficient amounts to influence mechanical behavior. The formation of stress-assisted, plate martensite raised the flow stress and the strain-hardening rate, but only after 25 to 40 pct martensite had formed. A TRIP effect was obtained,i.e., ductility was enhanced by concurrent martensite formation, but this occurred over only a narrow temperature range because of the strong temperature dependence of the austenite-to-plate martensite reaction. This is in contrast to the behavior of high-Cr austenitic steels, which exhibit a TRIP effect over a wide temperature range because of the formation of large amounts of fine strain-induced martensite, whose formation is less temperature-sensitive than that of plate martensite.
Databáze:	OpenAIRE
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