Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium

doi:https://doi.org/10.1016/j.actamat.2017.03.017

Title: Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium

Abstract

Here, the twinning activity in random textured cast magnesium during room temperature tension and compression tests was monitored by neutron diffraction (ND). Variation of integrated intensities of selected diffraction peaks, characterizing the twinned volume in particularly oriented grains was compared with calculated Schmid factors for extension twinning of these grains. It is shown that in tension there is a direct proportion between the twinned volume and the maximum value of the Schmid factor for a given grain orientation. In contrast, in compression this relation is not valid. The twinned volume in this case is influenced by both deviation of the grain from the ideal orientation and its rotation around the c-axis. The experimental results are in good agreement with those obtained from elasto-plastic self-consistent (EPSC) modeling.

Authors:

Capek, Jan ^[1]; Mathis, Kristian ^[2];

^[3]; Barnett, Matthew ^[4]

Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics and Dept. of Physics of Materials; Academy of Sciences of the Czech Republic (ASCR), Prague (Czech Republic). Nuclear Physics Inst.
Charles Univ., Prague (Czech Republic). Faculty of Mathematics and Physics and Dept. of Physics of Materials
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Deakin Univ., Geelong, VIC (Australia)

Publication Date:: 2017-03-30

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Czech Science Foundation (GACR); European Regional Development Fund (ERDF)

OSTI Identifier:: 1459810

Alternate Identifier(s):: OSTI ID: 1550482

Report Number(s):: LA-UR-16-27103
Journal ID: ISSN 1359-6454

Grant/Contract Number:: AC52-06NA25396; 14-36566G; 251715; CZ.02.1.01/0.0/0.0/15_003/0000485

Resource Type:: Journal Article: Accepted Manuscript

Journal Name:: Acta Materialia

Additional Journal Information:: Journal Volume: 130; Journal Issue: C; Journal ID: ISSN 1359-6454

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Twinning; Magnesium; Neutron diffraction; Schmid factor

Citation Formats


                    Capek, Jan, Mathis, Kristian, Clausen, Bjorn, and Barnett, Matthew. Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium.  United States: N. p., 2017. 
        Web.  doi:10.1016/j.actamat.2017.03.017.

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                    Capek, Jan, Mathis, Kristian, Clausen, Bjorn, & Barnett, Matthew. Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium.  United States.  https://doi.org/10.1016/j.actamat.2017.03.017

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                    Capek, Jan, Mathis, Kristian, Clausen, Bjorn, and Barnett, Matthew. Thu .  
        "Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium".  United States.  https://doi.org/10.1016/j.actamat.2017.03.017.  https://www.osti.gov/servlets/purl/1459810.

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@article{osti_1459810,

  title        = {Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium},

  author       = {Capek, Jan and Mathis, Kristian and Clausen, Bjorn and Barnett, Matthew},

  abstractNote = {Here, the twinning activity in random textured cast magnesium during room temperature tension and compression tests was monitored by neutron diffraction (ND). Variation of integrated intensities of selected diffraction peaks, characterizing the twinned volume in particularly oriented grains was compared with calculated Schmid factors for extension twinning of these grains. It is shown that in tension there is a direct proportion between the twinned volume and the maximum value of the Schmid factor for a given grain orientation. In contrast, in compression this relation is not valid. The twinned volume in this case is influenced by both deviation of the grain from the ideal orientation and its rotation around the c-axis. The experimental results are in good agreement with those obtained from elasto-plastic self-consistent (EPSC) modeling.},

  doi          = {10.1016/j.actamat.2017.03.017},

  url          = {https://www.osti.gov/biblio/1459810},
  journal      = {Acta Materialia},

  issn         = {1359-6454},

  number       = C,

  volume       = 130,

  place        = {United States},

  year         = {2017},

  month        = {3}

}

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https://doi.org/10.1016/j.actamat.2017.03.017

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Works referencing / citing this record:

Influence of the initial state on the microstructure and mechanical properties of AX41 alloy processed by ECAP
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Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques
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https://doi.org/10.3390/ma11020200

Effect of Ce Addition on Modifying the Microstructure and Achieving a High Elongation with a Relatively High Strength of As-Extruded AZ80 Magnesium Alloy
journal, December 2018

Wang, Zheng; Wang, Jin-Guo; Chen, Ze-Yu
Materials, Vol. 12, Issue 1
https://doi.org/10.3390/ma12010076

Evolución microestructural y envejecimiento dinámico por deformación en la aleación Mg-6%Gd- 1%Zn durante ensayos a tracción y compresión a temperaturas intermedias
journal, August 2018

Garcés, Gerardo; Pérez, Pablo; Barea, Rafael
Revista de Metalurgia, Vol. 54, Issue 3
https://doi.org/10.3989/revmetalm.124

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Title: Dependence of twinned volume fraction on loading mode and Schmid factor in randomly textured magnesium

Abstract

Citation Formats

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Investigation of the Microstructure Evolution and Deformation Mechanisms of a Mg-Zn-Zr-RE Twin-Roll-Cast Magnesium Sheet by In-Situ Experimental Techniques journal, January 2018

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journal, October 2018

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journal, January 2018

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