A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium

Andani, Mohsen Taheri; Lakshmanan, Aaditya; Karamooz-Ravari, Mohammadreza; Sundararaghavan, Veera; Allison, John; Misra, Amit

doi:10.1038/s41598-020-59684-y

Title: A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium

Abstract

Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resistance and micro-Hall–Petch coefficients for different grain boundary types are deduced. The results indicate that grain boundary character plays a crucial role in determining micro-Hall–Petch coefficients, which can be used to strengthen classical crystal plasticity constitutive models to make predictions linked to the effect of grain boundary strengthening.

Authors:

Andani, Mohsen Taheri ^[1]; Lakshmanan, Aaditya ^[2]; Karamooz-Ravari, Mohammadreza ^[3]; Sundararaghavan, Veera ^[4]; Allison, John ^[5]; Misra, Amit ^[1]

Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Mechanical Engineering; Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Aerospace Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Mechanical Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering; Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Mechanical Engineering
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering

Publication Date:: Thu Feb 20 00:00:00 EST 2020

Research Org.:: Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Engineering & Technology

OSTI Identifier:: 1629876

Grant/Contract Number:: SC0008637

Resource Type:: Accepted Manuscript

Journal Name:: Scientific Reports

Additional Journal Information:: Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Andani, Mohsen Taheri, Lakshmanan, Aaditya, Karamooz-Ravari, Mohammadreza, Sundararaghavan, Veera, Allison, John, and Misra, Amit. A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium.  United States: N. p., 2020. 
Web.  doi:10.1038/s41598-020-59684-y.

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                    Andani, Mohsen Taheri, Lakshmanan, Aaditya, Karamooz-Ravari, Mohammadreza, Sundararaghavan, Veera, Allison, John, & Misra, Amit. A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium.  United States.  https://doi.org/10.1038/s41598-020-59684-y

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                    Andani, Mohsen Taheri, Lakshmanan, Aaditya, Karamooz-Ravari, Mohammadreza, Sundararaghavan, Veera, Allison, John, and Misra, Amit. Thu .  
"A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium".  United States.  https://doi.org/10.1038/s41598-020-59684-y.  https://www.osti.gov/servlets/purl/1629876.

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@article{osti_1629876,

  title        = {A quantitative study of stress fields ahead of a slip band blocked by a grain boundary in unalloyed magnesium},

  author       = {Andani, Mohsen Taheri and Lakshmanan, Aaditya and Karamooz-Ravari, Mohammadreza and Sundararaghavan, Veera and Allison, John and Misra, Amit},

  abstractNote = {Stress localization ahead of a slip band blocked by a grain boundary is measured for three different grain boundaries in unalloyed Mg using high-resolution electron backscatter diffraction (HR-EBSD). The results are compared with a theoretical dislocation pile-up model, from which slip system resistance and micro-Hall–Petch coefficients for different grain boundary types are deduced. The results indicate that grain boundary character plays a crucial role in determining micro-Hall–Petch coefficients, which can be used to strengthen classical crystal plasticity constitutive models to make predictions linked to the effect of grain boundary strengthening.},

  doi          = {10.1038/s41598-020-59684-y},

  journal      = {Scientific Reports},

  number       = 1,

  volume       = 10,

  place        = {United States},

  year         = {Thu Feb 20 00:00:00 EST 2020},

  month        = {Thu Feb 20 00:00:00 EST 2020}

}

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