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Journal ArticleDOI

Mechanical response and texture evolution of AZ31 alloy at large strains for different strain rates and temperatures

TL;DR: In this paper, the texture properties of AZ31 Mg sheet were measured under different loadings along rolling direction (RD), 45° to rolling direction, 90° to roll direction (TD), and normal to the sheet (ND) to large strains.
About: This article is published in International Journal of Plasticity.The article was published on 2011-05-01. It has received 383 citations till now. The article focuses on the topics: Strain rate & Simple shear.
Citations
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Journal ArticleDOI
TL;DR: In this paper, a physics-based twinning and de-twinning (TDT) model is proposed for polycrystalline plastic deformation, which is characterized by four deformation mechanisms corresponding to twin nucleation, twin growth, twin shrinkage, and retwinning.

362 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate hardening mechanisms in pure magnesium and apply a dislocation-based formalism to model anisotropy, showing that pure magnesium under large strains develops substantial multivariant twinning and multifold twinning.

197 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of grain size on slip activity was investigated for magnesium polycrystals with average grain sizes (d ) of 36, 19 and 5μm and with very similar textures and grain boundary (GB) misorientation distributions.

184 citations

Journal ArticleDOI
TL;DR: In this paper, a general asymmetric yield function is proposed with dependence on the stress invariants for pressure sensitive metals, which is transformed in the space of the stress triaxaility, the von Mises stress and the normalized invariant to theoretically investigate the possible reason of the SD effect.

183 citations

Journal ArticleDOI
TL;DR: In this paper, the Visco-Plastic Self Consistent (VPSC) model was used to simulate a vast number of mechanical responses and crystallographic characteristics including stress-strain curves in tension, compression in three directions, and free-end torsion, texture evolution at different strains, lateral strains of compression samples, twin volume fraction, and axial strain during the torsions experiment.

180 citations

References
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Book
01 Jan 1972
TL;DR: Physical Metallurgy Principles as mentioned in this paper is intended for use in an introductory course in physical metallurgy and is designed for all engineering students at the junior or senior level and is largely theoretical, but covers all aspects of physical metelurgy and behavior of metals and alloys.
Abstract: Physical Metallurgy Principles is intended for use in an introductory course in physical metallurgy and is designed for all engineering students at the junior or senior level. The approach is largely theoretical, but covers all aspects of physical metallurgy and behavior of metals and alloys. The treatment used in this textbook is in harmony with a more fundamental approach to engineering education.

2,265 citations


"Mechanical response and texture evo..." refers background in this paper

  • ...This has been shown to be due to the different deformation mechanisms in tension and compression of these textured sheets, in-plane compression activates twinning at low stresses whereas in-plane tensile stress cannot induce such twins (Reed-Hill, 1973; Reed-Hill and Abbaschian, 1994; Lou et al., 2007)....

    [...]

  • ...…has been shown to be due to the different deformation mechanisms in tension and compression of these textured sheets, in-plane compression activates twinning at low stresses whereas in-plane tensile stress cannot induce such twins (Reed-Hill, 1973; Reed-Hill and Abbaschian, 1994; Lou et al., 2007)....

    [...]

Journal ArticleDOI
TL;DR: In this paper, a combination of experimental and simulation techniques were used to investigate the plastic behavior of wrought magnesium alloy and found that an increased activity of non-basal dislocations provides a self-consistent explanation for the observed changes in the anisotropy with increasing temperature.

1,427 citations


"Mechanical response and texture evo..." refers background or methods or result in this paper

  • ...The strength for specimens oriented along DD falls in between TD and RD similar to the results reported by Agnew and Duygulu, 2005....

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  • ...In addition, macrotextures were obtained by Jiang et al. (2007), Yi et al. (2006), Lou et al. (2007) and Agnew and Duygulu (2005) using X-ray diffraction and Jain et al. (2008), Brown et al. (2005), Muránsky et al. (2009) and Choi et al. (2007); using neutron diffraction, for (0 0 0 2) and ð10 10Þ…...

    [...]

  • ...Agnew and Duygulu (2005) and Lou et al. (2007) have studied the anisotropy and hardening of AZ31 alloy under tension and showed that the deformation was initially due to the basal slip and gradually shift towards non-basal slip due to an increase in flow stress at room temperature....

    [...]

  • ...The variation of strength between specimens oriented along RD and TD, or DD is consistent with data presented in the literature, e.g. Agnew and Duygulu (2005), and is most likely due to the greater angular spread of basal poles towards RD than TD as will be discussed below from the texture data....

    [...]

  • ...At elevated temperatures, pyramidal-II (or hc + ai) slip occurs at lower critical resolved shear stress (CRSS) and most Mg alloys, including AZ31, become quite formable (Agnew et al., 2001; Agnew and Duygulu, 2005)....

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Journal ArticleDOI
TL;DR: In this article, the authors focus on the distinction between the strain due to complete twinning and the macroscopic strain caused by formation of a thin twin lamella, and the subdivision of the orientation diagram according to the twinning system which can be operated by axial loading is a more complicated one than customarily indicated.

1,282 citations

Journal ArticleDOI
TL;DR: In this paper, the viscoplastic self-consistent model was used to interpret differences in the mechanical behavior of hexagonal close packed magnesium alloys, showing that the plane strain compression textures of the alloys showed an increasing tendency for the basal poles to rotate away from the normal direction towards the rolling direction.

1,238 citations


"Mechanical response and texture evo..." refers background in this paper

  • ...At elevated temperatures, pyramidal-II (or hc + ai) slip occurs at lower critical resolved shear stress (CRSS) and most Mg alloys, including AZ31, become quite formable (Agnew et al., 2001; Agnew and Duygulu, 2005)....

    [...]

  • ...Tensile loading normal to the sheet plane activates twinning at lower stress while compressive loading normal to the sheet plane does not activate twinning (Reed-Hill, 1973; Agnew et al., 2001; Staroselsky and Anand, 2003; Styczynski et al., 2004)....

    [...]

Book
01 Jan 2002
TL;DR: In this paper, the principles of plastic flow theory large strains tensile instability bending membrane analysis of circular shells stretching drawing stretching and drawing steady state forming of cylindrical shells exercises.
Abstract: Principles of plastic flow theory large strains tensile instability bending membrane analysis of circular shells stretching drawing stretching and drawing steady state forming of cylindrical shells exercises.

946 citations