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Correlation between strength and microstructure of ball-milled Al-Mg alloys determined by X-ray diffraction

Ribárik, Gábor and Gubicza, Jenő and Ungár, Tamás (2004) Correlation between strength and microstructure of ball-milled Al-Mg alloys determined by X-ray diffraction. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCURE AND PROCESSING, 387-89. pp. 343-347. ISSN 0921-5093

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Abstract

The microstructure of ball-milled Al base Al–Mg alloys is determined by the “Convolutional Multiple Whole Profile” fitting procedure proposed for the evaluation of X-ray diffraction peak profiles. The whole measured powder diffraction pattern is fitted by the sum of a polynomial background and physically well-established theoretical profile functions. The procedure provides the size distribution function of crystallites and the characteristic parameters of the dislocation structure. The mechanical strength of the specimens is correlated to the parameters of the microstructure by the Hall–Petch and the Taylor models. Both models show that the critical resolved shear stress saturates at a Mg-solute concentration of about 2 wt.% probably due to the clustering of the Mg-solute atoms.

Item Type: Article
Subjects: Q Science / természettudomány > QC Physics / fizika
Depositing User: Erika Bilicsi
Date Deposited: 12 Oct 2012 06:48
Last Modified: 12 Oct 2012 06:48
URI: http://real.mtak.hu/id/eprint/3101

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