Abridgment of nano and micro length scale mechanical properties of novel Mg-9Li-7Al-1Sn and Mg-9Li-5Al-3Sn-1Zn alloys using object oriented finite element modeling

    Authors

    A. Gupta; V. Kumar; J. Nair; A. Bansal;K. Balani

    Comments

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    Abbreviated Journal Title

    J. Alloy. Compd.

    Keywords

    Mg-Li based alloy; Stress analysis; Object oriented finite element; modeling (OOF2); Elastic modulus; Micromechanics models; MATERIAL MICROSTRUCTURES; ELASTIC-MODULUS; COMPOSITES; MULTISCALE; PARTICULATE; TEXTURE; STRESS; MATRIX; Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy &; Metallurgical Engineering

    Abstract

    In the recent years, magnesium-lithium (Mg-Li) alloys have attracted considerable attention/interest due to their high strength-to-density ratio and damping characteristic; and have found potential use in structural and biomedical applications. Here the mechanical behavior of novel Mg-9 wt.% Li-7 wt.% Al-1 wt.% Sn (LAT971) and Mg-9 wt.% Li-5 wt.% Al-3 wt.% Sn-1 wt.% Zn (LATZ9531) alloys is reported. Both, as cast and thermomechanically processed alloys have been studied which possess dual phase microstructure. Nanoindentation data have been utilized to envisage the elastic modulus of alloy via various micromechanics models (such as rule of mixtures, Voigt-Reuss, Cox model, Halpin-Tsai and Guth model) in order to estimate the elastic modulus. Object oriented finite element modeling (FEM) has been performed to predict stress distribution under tensile and compressive strain state. Close match between Halpin-Tsai model and FEM results show the abridgment of nano length scale property to evolution of microscopic stress distribution in novel LAT971 and LATZ9531 Mg-Li-Al based alloys. (C) 2015 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Alloys and Compounds

    Volume

    634

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    24

    Last Page

    31

    WOS Identifier

    WOS:000350915200005

    ISSN

    0925-8388

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