Modelling of the variant selection mechanism in the phase transformation of HSLA steel produced by compact strip production

2002 ◽  
Vol 50 (7) ◽  
pp. 1741-1747 ◽  
Author(s):  
M. Humbert ◽  
B. Gardiola ◽  
C. Esling ◽  
G. Flemming ◽  
K.E. Hensger
Keyword(s):  
Phase Transformation ◽  
Hsla Steel ◽  
Variant Selection ◽  
Selection Mechanism ◽  
Compact Strip Production ◽  
Strip Production

Determination and prediction of the inherited ferrite texture in a HSLA steel produced by compact strip production

2001 ◽  
Vol 303 (1-2) ◽  
pp. 60-69 ◽  
Author(s):  
B. Gardiola ◽  
M. Humbert ◽  
C. Esling ◽  
G. Flemming ◽  
K.E. Hensger
Keyword(s):  
Hsla Steel ◽  
Compact Strip Production ◽  
Strip Production

β→αs Variant Selection in Sharp hcp Textured Regions of a Bimodal IMI834 Billet

2005 ◽  
Vol 495-497 ◽  
pp. 663-668 ◽  
Author(s):  
Lionel Germain ◽  
Nathalie Gey ◽  
Michel Humbert ◽  
Philippe Bocher ◽  
Mohammad Jahazi
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Detailed Analysis ◽  
Orientation Distribution ◽  
The Other ◽  
Variant Selection ◽  
Selection Mechanism ◽  
Local Orientation

Regions with sharp local textures, called macrozones, have been characterised in a bimodal IMI834 billet, containing 30% of primary αp grains surrounded by secondary αs colonies. It is shown that the αs colonies have been inherited according to a strong variant selection during the β→αs phase transformation. In each observed macrozone, the favoured variants have in average their c-axes in the same macroscopic direction as the αp grains. A detailed analysis of neighbouring αp grains and αs variants clearly shows that the variants favoured at β/αp boundaries are those able to share their c-axes with a neighbouring αp grain. The sharpness of such a variant selection mechanism is strongly related to the local orientation distribution of neighbouring αp/β grains at high temperature. This explains the differences in variant selection sharpness observed from one macrozone to the other.

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