Recrystallization in AISI 304 austenitic stainless steel during and after hot deformation
Data(s) |
25/05/2008
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Resumo |
In order to improve the understanding of the dynamic and post-dynamic recrystallization behaviours of AISI 304 austenitic stainless steel, a series of hot torsion test have been performed under a range of deformation conditions. The mechanical and microstructural features of dynamic recrystallization (DRX) were characterized to compare and contrast them with those of the post-dynamic recrystallization. A necklace type of dynamically recrystallized microstructure was observed during hot deformation at 900 °C and at a strain rate of 0.01 s<sup>−1</sup>. Following deformation, the dependency of time for 50% recrystallization, t<sub>50</sub>, changed from “strain dependent” to “strain independent” at a transition strain (ε<sup>*</sup>), which is significantly beyond the peak. This transition strain was clearly linked to the strain for 50% dynamic recrystallization during deformation. The interrelations between the fraction of dynamically recrystallized microstructure, the evolution of post-dynamically recrystallized microstructure and the final grain size have been established. The results also showed an important role of grain growth on softening of deformed austenite.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier SA |
Relação |
http://dro.deakin.edu.au/eserv/DU:30017112/barnett-recrystalization-2008.pdf http://dx.doi.org/10.1016/j.msea.2007.08.026 |
Direitos |
2007, Elsevier B.V. |
Palavras-Chave | #stainless steel #hot deformation #dynamic recrystallization #post-dynamic recrystallization #EBSD |
Tipo |
Journal Article |