Variant selection in α → β → α phase transformation of cold rolled titanium sheet

1996 ◽  
Vol 34 (8) ◽  
pp. 1281-1286 ◽  
Author(s):  
Z.S. Zhu ◽  
J.L. Gu ◽  
N.P. Chen
Keyword(s):  
Phase Transformation ◽  
Variant Selection ◽  
Titanium Sheet ◽  
Α Phase ◽  
Cold Rolled

Variant selection and its effect on phase transformation textures in cold rolled titanium sheet

2000 ◽  
Vol 280 (1) ◽  
pp. 199-203 ◽  
Author(s):  
Z.S Zhu ◽  
J.L Gu ◽  
R.Y Liu ◽  
N.P Chen ◽  
M.G Yan
Keyword(s):  
Phase Transformation ◽  
Variant Selection ◽  
Titanium Sheet ◽  
Cold Rolled

Quantitative Analysis of Variant Selection and Orientation Relationships during the γ-to-α Phase Transformation in Hot-Rolled TRIP Steels

2010 ◽  
Vol 89-91 ◽  
pp. 359-364 ◽  
Author(s):  
Loïc Malet ◽  
Pascal J. Jacques ◽  
Stéphane Godet
Keyword(s):  
Phase Transformation ◽  
Orientation Relationship ◽  
Hot Deformation ◽  
High Performance ◽  
Statistical Treatment ◽  
Phenomenological Theory ◽  
Variant Selection ◽  
Orientation Relationships ◽  
Α Phase ◽  
Hot Rolled

The orientation relationships that apply to the fcc (γ) – bcc (α) phase transformation in high-performance hot-rolled TRIP-aided steels were characterised by EBSD techniques. A statistical treatment of the experimental data allows the mean orientation relationship to be determined. This mean orientation relationship was compared to the models commonly proposed in the literature and confronted qualitatively to the predictions of the phenomenological theory of martensite crystallography (PTMC). The variant selection phenomenon was also characterized quantitatively at the level of individual austenite grains. The reconstruction of the EBSD maps evidences that bainite grows by packets in which the bainite laths share a common {111}γ plane in the austenite. This growth mechanism is not influenced by the prior hot deformation of the austenite. The hot deformation has a critical influence on the number of packets that forms. The analysis of the crystallographic features of the bainite packets reveals that all possible variants are formed in a packet, though in different proportions.

The influence of rolling temperature on texture evolution and variant selection during α→β→α phase transformation in Ti–6Al–4V

2012 ◽  
Vol 60 (17) ◽  
pp. 6013-6024 ◽  
Author(s):  
G.C. Obasi ◽  
S. Birosca ◽  
D.G. Leo Prakash ◽  
J. Quinta da Fonseca ◽  
M. Preuss
Keyword(s):  
Phase Transformation ◽  
Texture Evolution ◽  
Rolling Temperature ◽  
Variant Selection ◽  
Α Phase

In Situ Studies of Variant Selection During the α-β-α Phase Transformation in Zr-2.5Nb

2011 ◽  
Vol 8 (1) ◽  
pp. 103066 ◽  
Author(s):  
P. Mosbrucker ◽  
M. R. Daymond ◽  
R. A. Holt ◽  
P. Barberis ◽  
S. W. Dean
Keyword(s):  
Phase Transformation ◽  
Variant Selection ◽  
In Situ Studies ◽  
Α Phase

Restitution conditions of the parent cubic texture from the inherited hexagonal texture in the β–α phase transformation

1999 ◽  
Vol 32 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Michel Humbert ◽  
Nathalie Gey
Keyword(s):  
Phase Transformation ◽  
Distribution Function ◽  
Correlation Function ◽  
Room Temperature ◽  
Hexagonal Phase ◽  
Parent Phase ◽  
Orientation Distribution ◽  
Variant Selection ◽  
Qualitative Information ◽  
Α Phase

Different factors calculated from theCcoefficients of the inherited orientation distribution function (ODF) allow us to check the importance of the variant selection. When no variant selection or a slight variant selection occurs by the cubic-to-hexagonal phase transformation, it is possible to calculate the ODF of the cubic parent phase present at high temperature from the ODF of the inherited hexagonal phase at room temperature. When a stronger variant selection occurs, qualitative information about the parent ODF can be obtained by using a specific correlation function, which we have named R(g).

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