Influence of cooling rate on ω phase precipitation and deformation mechanism of a novel metastable β titanium alloy

2021 ◽  
pp. 142151
Author(s):  
Kaige Wang ◽  
Di Wu ◽  
Dong Wang ◽  
Zixuan Deng ◽  
Yueyan Tian ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Cooling Rate ◽  
Deformation Mechanism ◽  
Phase Precipitation ◽  
Ω Phase

Effects of ω-phase precipitation on β→α, α′′ transformations in a metastable β titanium alloy

2001 ◽  
Vol 312 (1-2) ◽  
pp. 182-188 ◽  
Author(s):  
Yasuya Ohmori ◽  
Toshitaka Ogo ◽  
Kiyomichi Nakai ◽  
Sengo Kobayashi
Keyword(s):  
Titanium Alloy ◽  
Phase Precipitation ◽  
Ω Phase

scholarly journals Hot Deformation Behavior and Processing Maps of a New Ti-6Al-2Nb-2Zr-0.4B Titanium Alloy

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2456
Author(s):  
Zhijun Yang ◽  
Weixin Yu ◽  
Shaoting Lang ◽  
Junyi Wei ◽  
Guanglong Wang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Flow Stress ◽  
Constitutive Equation ◽  
Deformation Mechanism ◽  
Power Dissipation ◽  
Hot Deformation ◽  
Dissipation Rate ◽  
Dynamic Recovery ◽  
Processing Maps ◽  
Temperature Range

The hot deformation behaviors of a new Ti-6Al-2Nb-2Zr-0.4B titanium alloy in the strain rate range 0.01–10.0 s−1 and temperature range 850–1060 °C were evaluated using hot compressing testing on a Gleeble-3800 simulator at 60% of deformation degree. The flow stress characteristics of the alloy were analyzed according to the true stress–strain curve. The constitutive equation was established to describe the change of deformation temperature and flow stress with strain rate. The thermal deformation activation energy Q was equal to 551.7 kJ/mol. The constitutive equation was ε ˙=e54.41[sinh (0.01σ)]2.35exp(−551.7/RT). On the basis of the dynamic material model and the instability criterion, the processing maps were established at the strain of 0.5. The experimental results revealed that in the (α + β) region deformation, the power dissipation rate reached 53% in the range of 0.01–0.05 s−1 and temperature range of 920–980 °C, and the deformation mechanism was dynamic recovery. In the β region deformation, the power dissipation rate reached 48% in the range of 0.01–0.1 s−1 and temperature range of 1010–1040 °C, and the deformation mechanism involved dynamic recovery and dynamic recrystallization.

A new insight into the α phase precipitation in β titanium alloy

Vacuum ◽  
2021 ◽  
Vol 189 ◽  
pp. 110272
Author(s):  
Libo Zhou ◽  
Jinshan Sun ◽  
Ruizhi Zhang ◽  
Jian Chen ◽  
Jianjun He ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Phase Precipitation ◽  
Α Phase ◽  
Insight Into

Evolution of ω phase during heating of metastable β titanium alloy Ti–15Mo

2017 ◽  
Vol 53 (1) ◽  
pp. 837-845 ◽  
Author(s):  
Pavel Zháňal ◽  
Petr Harcuba ◽  
Michal Hájek ◽  
Bohumil Smola ◽  
Josef Stráský ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Ω Phase

Origins of different tensile behaviors induced by cooling rate in a near alpha titanium alloy Ti65

Materialia ◽  
2018 ◽  
Vol 1 ◽  
pp. 128-138 ◽  
Author(s):  
Ke Yue ◽  
Jianrong Liu ◽  
Shaoxiang Zhu ◽  
Lei Wang ◽  
Qingjiang Wang ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Cooling Rate ◽  
Alpha Titanium

Effects of Cooling Rate and Sn Addition on the Microstructure of Ti-Nb-Sn Alloys

2011 ◽  
Vol 172-174 ◽  
pp. 190-195 ◽  
Author(s):  
Giorgia T. Aleixo ◽  
Eder S.N. Lopes ◽  
Rodrigo Contieri ◽  
Alessandra Cremasco ◽  
Conrado Ramos Moreira Afonso ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Melting Furnace ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Β Phase ◽  
Arc Melting ◽  
Ti Alloys ◽  
Ω Phase

Ti-based alloys present unique properties and hence, are employed in several industrial segments. Among Ti alloys, β type alloys form one of the most versatile classes of materials in relation to processing, microstructure and mechanical properties. It is well known that heat treatment of Ti alloys plays an important role in determining their microstructure and mechanical behavior. The aim of this work is to analyze microstructure and phases formed during cooling of β Ti-Nb-Sn alloy through different cooling rates. Initially, samples of Ti-Nb-Sn system were prepared through arc melting furnace. After, they were subjected to continuous cooling experiments to evaluate conditions for obtaining metastable phases. Microstructure analysis, differential scanning calorimetry and X-ray diffraction were performed in order to evaluate phase transformations. Depending on the cooling rate and composition, α” martensite, ω phase and β phase were obtained. Elastic modulus has been found to decrease as the amount of Sn was increased.

Effect of boundary on the alpha phase precipitation in a near-alpha titanium alloy

2018 ◽  
Vol 233 ◽  
pp. 298-301 ◽  
Author(s):  
Xiongxiong Gao ◽  
Weidong Zeng ◽  
Xin Li ◽  
Dadi Zhou ◽  
Jianwei Xu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Alpha Phase ◽  
Phase Precipitation ◽  
Alpha Titanium
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