Morphology characteristics of α precipitates related to the crystal defects and the strain accommodation of variant selection in a metastable β titanium alloy

2021 ◽  
Vol 95 ◽  
pp. 1-9
Author(s):  
Ruifeng Dong ◽  
Hongchao Kou ◽  
Yuhong Zhao ◽  
Xiaoyang Zhang ◽  
Ling Yang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Crystal Defects ◽  
Variant Selection ◽  
Morphology Characteristics

scholarly journals Criteria for fast and selective α precipitation at β grain boundaries in Ti-alloys Consequence for in-service microstructures

2020 ◽  
Vol 321 ◽  
pp. 12040
Author(s):  
Tao Liu ◽  
Lionel Germain ◽  
Julien Teixeira ◽  
Elisabeth Aeby-Gautier ◽  
Nathalie Gey
Keyword(s):  
Titanium Alloy ◽  
Grain Boundaries ◽  
Simulation Study ◽  
Variant Selection ◽  
Industrial Products ◽  
Ti Alloys ◽  
Electron Backscatter

The potential for β grain boundaries (GBs) to give rise to large Widmanstätten colonies was determined through the observation of a large amount of precipitates at β GBs in a β-metastable titanium alloy using electron backscatter imaging and diffraction. The most critical boundaries are those which transform early and where a type of Variant Selection (VS) called double Burgers VS occurs. This mechanisms take place at ‘special’ β boundaries misoriented so that an α precipitate can be related to both grains through the Burgers relation. It was shown that the most critical GBs have a disorientation at an angle of less than 10° from 49.5°/<110> or 60°/<110>. A simulation study allowed those boundaries to be quantifed in crystallographic textures typical of industrial products. Those texture have then been discussed as a function of their potential to form large Widmanstätten colonies.

Effect of Primary α Grain on Variant Selection of Secondary α Phase in a Near-α Titanium Alloy

2019 ◽  
Author(s):  
Yu Zhou ◽  
Ke Wang ◽  
Qinghui Zeng ◽  
Yong Zheng ◽  
Renlong Xin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Variant Selection ◽  
Α Phase ◽  
Selection Of

Variant selection in laser melting deposited α + β titanium alloy

2016 ◽  
Vol 661 ◽  
pp. 126-135 ◽  
Author(s):  
Zhuo Li ◽  
Jing Li ◽  
Yanyan Zhu ◽  
Xiangjun Tian ◽  
Huaming Wang
Keyword(s):  
Titanium Alloy ◽  
Variant Selection ◽  
Laser Melting

The Martensitic Transformation Texture in Ti-6Al-4V

2005 ◽  
Vol 495-497 ◽  
pp. 669-674 ◽  
Author(s):  
Nicole Stanford ◽  
Pete S. Bate
Keyword(s):  
Titanium Alloy ◽  
Martensitic Transformation ◽  
Grain Boundaries ◽  
Elastic Interaction ◽  
Variant Selection ◽  
Martensite Formation ◽  
Transformation Texture ◽  
Diffusional Transformation

The transformation texture associated with martensite formation in the titanium alloy Ti- 6Al-4V has been investigated. Samples were heated into the fully b phase and quenched to form a microstructure of very fine a' martensite with no evidence of diffusional transformation at the prior b grain boundaries. EBSD texture measurements on the martensite showed that within each prior b grain, although typically all 12 variants of a’ were formed, the fractions of variants was far from uniform. The a’ texture was markedly different from values calculated using equal variant probability, also indicating that significant variant selection was occurring during martensitic transformation. This effect was modelled on the basis of elastic interaction between martensite events.

A variant selection mechanism in the deformed and recrystallized β matrix of a metastable β-titanium alloy

2018 ◽  
Vol 98 (7) ◽  
pp. 273-282
Author(s):  
Subrata Panda ◽  
Dipankar Banerjee ◽  
Ganesh S. Avadhani ◽  
Satyam Suwas
Keyword(s):  
Titanium Alloy ◽  
Variant Selection ◽  
Selection Mechanism
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