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18-08-2015

Microstructures and grain refinement performance of Al–Ti–B–C grain refiner via powder metallurgy

Authors: Cong Xu, Wen-Long Xiao, Shi-Zhen Wen, Yue-Jun Zhen, Chao-Li Ma

Published in: Rare Metals | Issue 7/2022

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Abstract

The Al-5Ti-0.5B-0.5C grain refiner was prepared by powder metallurgy (PM). Microstructures of the grain refiner and its grain refinement performance in commercially pure aluminum (Al) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). It is found that the average grain size of commercially pure Al can be reduced from ~15,000 to ~180 μm by the addition of Al-5Ti-0.5B-0.5C grain refiner prepared by PM, based on 0.01 wt% Ti addition. The grain refinement efficiency begins to decrease slightly when the grain refiner is kept in the melt for 60 min. The grain refinement is attributed to high stability, proper size, and high density of Al₃Ti, TiB₂, and TiC particles.

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Title: Microstructures and grain refinement performance of Al–Ti–B–C grain refiner via powder metallurgy
Authors: Cong Xu
Wen-Long Xiao
Shi-Zhen Wen
Yue-Jun Zhen
Chao-Li Ma
Publication date: 18-08-2015
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 7/2022
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-015-0578-2

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