Grain refinement effect of Al-Sc-B master alloy for Zr/Sc containing Al alloys

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-03-19 DOI:10.1016/j.matlet.2025.138426

Huabing Yang , Ying Li , Kaiming Cheng , Yunteng Liu , Jianhua Wu , Hongtao Liu , Jin Wang , Dongqing Zhao , Linghui Song , Jixue Zhou , Xiangfa Liu

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Abstract

Traditional Al-Ti-B/C grain refiners subject to “poisoning effect” when Zr/Sc elements are contained in Al alloys during inoculation. To overcome the difficulty, an Al-2Sc-0.5B master alloy was prepared in this work. It was found that ScB₂ and ScAl₃ were the main secondary phases in the alloy. Introducing 0.01 % Sc using the Al-2Sc-0.5B to commercial purity Al-0.13Zr alloy, its α-Al grain size could be refined from 1179 μm to 646 μm. However, adding 0.01 %Sc using Al-2Sc master alloy which just contained secondary phase of ScAl₃ showed nearly no grain refinement effect. It indicated that ScB₂ played important role in the grain refinement. According to crystallographic analysis, (0001)ScB₂ and (111)Al had the same atomic arrangement, and crystal mismatch between them was ∼ 7.71 % at 660℃. Thus, ScB₂ was proposed a potential nucleation substrate for α-Al.

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Al-Sc- b中间合金对含Zr/Sc铝合金的晶粒细化效果

传统的Al- ti - b /C晶粒细化剂在接种过程中，当铝合金中含有Zr/Sc元素时，会产生“中毒效应”。为了克服这一困难，本文制备了Al-2Sc-0.5B中间合金。结果表明，ScB2和ScAl3是合金中主要的二次相。采用Al-2Sc-0.5B将0.01 %的Sc引入到工业纯Al-0.13Zr合金中，α-Al晶粒尺寸可由1179 μm细化到646 μm。而在只含ScAl3二次相的Al-2Sc中间合金中添加0.01% Sc时，晶粒细化效果几乎为零。表明ScB2在晶粒细化中起重要作用。晶体学分析表明，（0001）ScB2和（111）Al具有相同的原子排列，在660℃时，它们之间的晶体不匹配度为~ 7.71%。因此，ScB2被认为是α-Al的潜在成核底物。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive