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On the microsegregation of Al-Mg alloys by thermal analysis and numerical modeling
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Casting of Metals.
2014 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 610, 462-471 p.Article in journal (Refereed) Published
Abstract [en]

Knowledge about solid fraction versus temperature during solidification is crucial for the control of solidification processes. In the present paper solidification sequence and path of Al-Mg binary alloys containing 6.7 and 10.2 wt.% Mg was investigated by a series of DTA and quenching experiments and numerical modeling in 0.5 and 5 K min(-1) cooling rates. Experimental results show that at both cooling rates, Al-6.7 wt.% Mg solidifies with a single phase structure, but Al-10.2 wt.% Mg solidifies with a two phase structure. According to the results of numerical modeling, good agreement between calculated solidification curves and experimental solid fractions, but poor correlation with concentration profiles. The source of discrepancies is discussed according to different theories of microsegregation.

Place, publisher, year, edition, pages
2014. Vol. 610, 462-471 p.
Keyword [en]
Binary Al-Mg alloys, Solidification, Differential thermal analysis, Microsegregation, Diffusion coefficient
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-148596DOI: 10.1016/j.jallcom.2014.05.026ISI: 000338811100073ScopusID: 2-s2.0-84901999449OAI: diva2:737219

QC 20140812

Available from: 2014-08-12 Created: 2014-08-11 Last updated: 2014-08-12Bibliographically approved

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