Formation of the ω Phase in the Titanium—Iron System under Shear Deformation
Formation of the ω Phase in the Titanium—Iron System under Shear Deformation
复制标题
剪切变形下钛铁体系中Ï相的形成
DOI：
10.1134/s0021364020100033
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发表时间：
2020
期刊：
影响因子：
1.3
通讯作者：
B. Baretzky
中科院分区：
文献类型：
--
作者：
B.B. Straumal;A.R. Kilmametov;A.A. Mazilkin;A.S. Gornakova;O.B. Fabrichnaya;M.J. Kriegel;D. Rafaja;M.F. Bulatov;A.N. Nekrasov;B. Baretzky
研究了Ti-4wt%Fe合金在高压扭转剪切变形下相组成对α/β-Ti（Fe）→ω-Ti（Fe）相变的影响。对于通过HPT进行的剪切变形，使用合金的两种初始状态，这两种初始状态在相的形态和β相中的铁原子浓度方面显著不同。在HPT期间，在两个样品系列中均出现稳定状态，其特征在于存在含有4wt% Fe的单一ω相和约200 nm的晶粒尺寸。因此，HPT状态是等效的，并且与样品的初始相组成无关。结果表明，Ti-4wt%Fe合金在HPT作用下，不仅发生了向ω相的马氏体（剪切）相变，而且合金元素的原子发生了明显的质量转移。直接在HPT过程中的扭矩的变化的分析，使得有可能估计的变形引起的传质速率。它比处理温度THPT = 30°C时的常规热扩散率高18-19个数量级，而它接近700-800°C时的扩散率值。这是因为HPT增加了晶格缺陷的浓度，这反过来相当于温度的增加。在HPT和马氏体（剪切）相变过程中的加速传质的类似组合先前在铜基形状记忆合金中观察到，但首次研究了钛合金中ω相的形成。
The effect of the phase composition on the α/β-Ti(Fe)→ω-Ti(Fe) transformation in the Ti-4 wt % Fe alloy under shear strain with high-pressure torsion (HPT) has been studied. For shear deformation by means of HPT, two initial states of the alloy were used, which significantly differed in the morphology of the phases and the concentration of iron atoms in the β phase. During HPT, a stationary state occurred in both sample series, which is characterized by the presence of a single ω phase containing 4 wt % Fe and by a grain size of about 200 nm. Thus, the HPT state is equifinal and independent of the initial phase composition of the samples. It was found that under the influence of HPT in Ti-4 wt % Fe alloys not only martensitic (shear) transformation into the ω phase occurs, but also a significant mass transfer of atoms of the alloying element. An analysis of the change in the torsion torque directly in the HPT process made it possible to estimate the rate of deformation-induced mass transfer. It is 18–19 orders of magnitude higher than the rate of conventional thermal diffusion at the processing temperatureTHPT= 30°C, while it is close to the diffusivity values at 700–800°C. This is because HPT increases the concentration of lattice defects, which in turn is equivalent to an increase in temperature. A similar combination of accelerated mass transfer during HPT and martensitic (shear) transformation was previously observed in copper-based shape memory alloys, but for the first time studied for the formation of ω-phase in titanium alloys.
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钨在 β-钛中扩散的活化体积
影响因子：
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作者：
H. Araki;Y. Minamino;T. Yamane;S. Saji;S. Ogino;Y. Miyamoto
通讯作者：
Y. Miyamoto
DOI：
10.1002/pssb.2221440122
发表时间：
1987-11-01
期刊：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
影响因子：
--
作者：
KOHLER, U;HERZIG, C
通讯作者：
HERZIG, C
DOI：
--
发表时间：
--
期刊：
--
影响因子：
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作者：
Kaveh Edalatia;Eiichiro Matsubarab;Zenji Horitaa
通讯作者：
Kaveh Edalatia;Eiichiro Matsubarab;Zenji Horitaa
DOI：
10.1088/1742-6596/240/1/012003
发表时间：
2010
期刊：
Journal of Physics: Conference Series
影响因子：
--
作者：
X. Sauvage;A. Chbihi;X. Quelennec
通讯作者：
X. Quelennec
晶界润湿对Al-Zn系固溶体形成的影响
影响因子：
1.3
作者：
O. Kogtenkova;B. Straumal;S. Protasova;A. Gornakova;P. Ziȩba;T. Czeppe
通讯作者：
T. Czeppe