Reverse transformation mechanism of martensite to austenite in a metastable austenitic alloy

The reverse transformation of martensite to austenite in a metastable austenitic alloy was investigated during continuous heating followed by isothermal holding. The diffusionless reverse transformation occurred irrespective of heating rate during continuous heating, resulting in lath-shaped austeni...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2009-07, Vol.515 (1), p.32-37
Hauptverfasser:	Lee, Seok-Jae, Park, Yong-Min, Lee, Young-Kook
Format:	Artikel
Sprache:	eng
Schlagworte:	Cross-disciplinary physics: materials science rheology Diffusionless transformation Diffusive transformation Exact sciences and technology Martensitic transformations Materials science Metastable austenitic alloy Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Reverse transformation Strain-induced martensite
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Zusammenfassung:	The reverse transformation of martensite to austenite in a metastable austenitic alloy was investigated during continuous heating followed by isothermal holding. The diffusionless reverse transformation occurred irrespective of heating rate during continuous heating, resulting in lath-shaped austenite with high dislocation density. During isothermal holding, the equiaxed grains are nucleated and grow due to the diffusive reverse transformation. With further holding time, the diffusionlessly formed austenite laths were recovered to be subgrains. These results are summarized by the reverse transformation–temperature–time diagram.
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2009.02.010