首页|Microstructure evolution of Ti48Zr27Cu6Nb5Be14 amorphous alloy after semi-solid isothermal treatment

Microstructure evolution of Ti48Zr27Cu6Nb5Be14 amorphous alloy after semi-solid isothermal treatment

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The as-cast amorphous Ti48Zr27Cu6Nb5Be14 composites,comprising in situ formed β-Ti ductile crystalline precipitates,were prepared by water cooled copper mold suction casting.Then,the semi-solid composites were obtained after the as-cast composites were treated by semi-solid isothermal treatment.The microstructure evolution and kinetics of the composites were examined.Results show that the microstructures of both the as-cast and semi-solid composites comprise of β-Ti crystal phases and amorphous matrix phases.Before and after treatment,the crystals evolve from fine granular or fine dendritic crystals to coarse crystals.As the treatment temperature increasing or the time prolonging,the average crystal size gradually increases and the surface morphology of the crystals gradually becomes regular.By studying the microstructural evolution and dynamics during the isothermal treatment process,it is found that the final morphology of β-Ti crystals is influenced by the isothermal treatment temperature and time(t),and the β-Ti evolution rate increases with an increase in treatment temperature.In addition,a linear relationship was observed between the size of cubic β-Ti crystals(D3)and t;the growth kinetics factor K is 3.8 μm3·s-1.As the K value closes to 4 μm3·s-1,it is inferred the morphology evolution of β-Ti crystals is a coarsening behavior controlled by the diffusion of solute elements.

Ti48Zr27Cu6Nb5Be14amorphous matrix compositessemi-solidas-castmicrostructure

Xin-hua Huang、Jing-wen Pu、Yong-xin Luo、Yue-jun Ouyang

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School of Material,Electricity and Intelligent Manufacturing,Huaihua University,Huaihua 330031,Hunan,China

Hunan Renewable Aluminum Innovation Research Center Huaihua University,Huaihua 330031,Hunan,China

湖南省自然科学基金Science Research Excellent Youth Project of Hunan Educational DepartmentKey Scientific Research Project of Hunan Educational DepartmentKey Scientific Research Projects of Huaihua University

2023JJ5045322B077722A0551HHUY2022-13

2024

10.1007/s41230-024-3051-8

中国铸造
沈阳铸造研究所

中国铸造

CSTPCDEI
影响因子：0.299
ISSN：1672-6421
年,卷(期)：2024.21(3)
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