【摘 要】
：
A new Al-5Ti-0.75B-0.2C master alloy was successfully prepared by self-propagating high-temperature(SHS)reaction from an Al-Ti-B_4C system with molten Al.Micros
【机 构】
：
School of Materials Science and Engineering,Sichuan University,Key Laboratory of Advanced Special Ma
【出 处】
：
Acta Metallurgica Sinica(English Letters)
论文部分内容阅读
A new Al-5Ti-0.75B-0.2C master alloy was successfully prepared by self-propagating high-temperature(SHS)reaction from an Al-Ti-B_4C system with molten Al.Microstructure and phase characterization of the prepared Al-5Ti-0.75B-0.2C master alloy show that the nearly spherical TiC particles,hexagonal or rectangular TiB_2 particles,and blocklike TiAl_3 particles distribute uniformly in the aluminum matrix.Grain refining test on commercial pure aluminum indicates that Al-5Ti-0.75B-0.2C master alloy exhibits a better grain refining performance than Al-5Ti-lB master alloy.By addition of 0.2 wt%Al-5Ti-0.75B-0.2C master alloy,the average grain size of a-Al can be effectively refined to160 ± 5 μm from about 3000 μm,and the tensile strength and elongation are increased by about 20%and 14.1%due to the grain refinement.
A new Al-5Ti-0.75B-0.2C master alloy was successfully prepared by self-propagating high-temperature (SHS) reaction from an Al-Ti-B_4C system with molten Al.Mrostructure and phase characterization of the prepared Al-5Ti- 0.75B-0.2C master alloy show that the nearly spherical TiC particles, hexagonal or rectangular TiB_2 particles, and blocklike TiAl_3 particles distribute uniformly in the aluminum matrix. Graph refining test on commercial pure aluminum indicates that Al-5Ti-0.75B-0.2C Master alloy exhibits a better grain refining performance than Al-5Ti-1B master alloy. By addition of 0.2 wt% Al-5Ti-0.75B-0.2C master alloy, the average grain size of a-Al can be refined refined to 160 ± 5 μm from about 3000 μm, and the tensile strength and elongation are increased by about 20% and 14.1% due to the grain refinement.
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