熔体过热处理下Al-20%Mg2Si复合材料组织与凝固特性的热分析

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-09-10 DOI:10.22068/IJMSE.2056

S. Shabestari, S. Ashkvary, Farnaz Yavari

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引用次数: 3

摘要

研究了熔体过热处理对Al–20%Mg2Si原位复合材料凝固特性和微观结构的影响。结果表明，熔体过热温度对初生Mg2Si颗粒的凝固参数和形貌有显著影响。利用冷却曲线热分析方法获得的凝固参数表明，在相同条件下，初生Mg2Si颗粒的形核温度和形核过冷度均随熔体过热温度的升高而升高，而再辉过冷度则降低。此外，根据微观结构评估，熔体过热处理可以细化初级Mg2Si颗粒，并将其形态从树枝状改变为更球形，α-Al+Mg2Si的共晶组织变得更细，共晶层之间的距离变小。。

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Assessment of the Microstructure and Solidification Characteristics of Al–20%Mg2Si Composite under Melt Superheating Treatment Using Thermal Analysis

The influence of melt superheating treatment on the solidification characteristics and microstructure of Al–20%Mg2Si in-situ composite has been investigated. The results revealed that melt superheating temperature has significant effects on solidification parameters and morphology of primary Mg2Si particles. Solidification parameters acquired using the cooling curve thermal analysis method, indicate that both nucleation temperature and nucleation undercooling of primary Mg2Si particles increase by increasing melt superheating temperature, while recalescence undercooling decrease under the same condition. Also, based on the microstructural evaluations, melt superheating treatment can refine primary Mg2Si particles and alter their morphology from dendritic shape to more spherical shape and the eutectic microstructure of α-Al + Mg2Si becomes finer and the distance between eutectic layers becomes smaller..

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.