|Constitutive Modeling, Microstructure Evolution, and Processing Map for a Nitride-Strengthened Heat-Resistant Steel|
|W. F. Zhang; W. Sha; W. Yan; W. Wang; Y. Y. Shan; K. Yang
|Source Publication||Journal of Materials Engineering and Performance
|Abstract||A constitutive equation was established to describe the deformation behavior of a nitride-strengthened (NS) steel through isothermal compression simulation test. All the parameters in the constitutive equation including the constant and the activation energy were precisely calculated for the NS steel. The result also showed that from the stress-strain curves, there existed two different linear relationships between critical stress and critical strain in the NS steel due to the augmentation of auxiliary softening effect of the dynamic strain-induced transformation. In the calculation of processing maps, with the change of Zener-Hollomon value, three domains of different levels of workability were found, namely excellent workability region with equiaxed-grain microstructure, good workability region with "stripe" microstructure, and the poor workability region with martensitic-ferritic blend microstructure. With the increase of strain, the poor workability region first expanded, then shrank to barely existing, but appeared again at the strain of 0.6.|
|description.department||[zhang, wen-feng] univ sci & technol china, hefei 230026, peoples r china. [zhang, wen-feng
; yan, wei
; wang, wei
; shan, yi-yin
; yang, ke] chinese acad sci, inst met res, shenyang 110016, peoples r china. chinese acad sci, grad sch, beijing 100049, peoples r china. [sha, wei] queens univ belfast, sch planning architecture & civil engn, belfast bt9 5ag, antrim, north ireland.
; sha, w (reprint author), queens univ belfast, sch planning architecture & civil engn, belfast bt9 5ag, antrim, north ireland.
Induced Ferrite Transformation
W. F. Zhang,W. Sha,W. Yan,et al. Constitutive Modeling, Microstructure Evolution, and Processing Map for a Nitride-Strengthened Heat-Resistant Steel[J]. Journal of Materials Engineering and Performance,2014,23(8):3042-3050.
W. F. Zhang,W. Sha,W. Yan,W. Wang,Y. Y. Shan,&K. Yang.(2014).Constitutive Modeling, Microstructure Evolution, and Processing Map for a Nitride-Strengthened Heat-Resistant Steel.Journal of Materials Engineering and Performance,23(8),3042-3050.
W. F. Zhang,et al."Constitutive Modeling, Microstructure Evolution, and Processing Map for a Nitride-Strengthened Heat-Resistant Steel".Journal of Materials Engineering and Performance 23.8(2014):3042-3050.
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