Formation regularities of grain-boundary interlayers of the α-Ti phase in binary titanium alloys

被引：0
作者：
A. S. Gornakova
S. I. Prokofiev
K. I. Kolesnikova
B. B. Straumal
机构：
[1] Russian Academy of Sciences,Institute of Solid
[2] National University of Science and Technology “MISiS”,State Physics
来源：
Russian Journal of Non-Ferrous Metals | 2016年 / 57卷
关键词：
grain boundaries; titanium alloys; wetting;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The microstructure of polycrystalline alloys of titanium with chromium (2, 4, and 5.5 wt %), cobalt (2 and 4 wt %), and copper (2 and 3 wt %) is investigated. Series of prolonged isothermal annealing of these materials are performed in a temperature range from 600 to 850°C (in vacuum). Annealing temperatures fall in two-phase regions α(Ti,Me) + β(Ti,Me) of phase diagrams Ti–Cr, Ti–Co, and Ti–Cu. Temperature dependences of the fraction of grain boundaries β(Ti,Me)/β(Ti,Me) completely “wetted” by interlayers of the second solid phase α(Ti,Me) and average contact angle are measured. The results of microstructural investigations showed that the type and concentration of the second component in the alloy strongly affect the formation of equilibrium grain-boundary interlayers. A nonmonotonic temperature dependence of the fraction of grain boundaries completely wetted by interlayers of the second solid phase in the absence of ferromagnet–paramagnet phase transformations in the volume is revealed for the first time.
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页码：229 / 235
页数：6
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