Characterization of Staggered Twin Formation in HCP Magnesium

M. Arul Kumar; B. Leu; P. Rottmann; I. J. Beyerlein

doi:10.1007/978-3-030-05789-3_31

Characterization of Staggered Twin Formation in HCP Magnesium

M. Arul Kumar
, B. Leu
, P. Rottmann
, I. J. Beyerlein

Producción científica: Conference contribution › revisión exhaustiva

4 Citas (Scopus)

Resumen

Twins in hexagonal close-packed polycrystals, most often nucleate at grain-boundaries (GBs), propagate into the grain and terminate at opposing GBs. Regularly, multiple parallel twins of the same variant form inside the same grain. When twins terminate inside the grains, rather than the grain boundary, they tend to form a staggered structure. Whether a staggered twin structure or the more common grain spanning twin structure forms can greatly affect mechanical behavior. In this work, the underlying mechanism for the formation of staggered twins is studied using an elasto-visco-plastic fast Fourier transform model, which quantifies the local stresses associated with -type staggered twins in magnesium for different configurations. The model results suggest that when a twin tip is close to the lateral side of another twin, the driving force for twin propagation is significantly reduced. As a result, the staggered twin structure forms.

Idioma original	English
Título de la publicación alojada	Magnesium Technology, 2019
Editores	J. Brian Jordon, Vineet V. Joshi, Neale R. Neelameggham, Dmytro Orlov
Páginas	207-213
Número de páginas	7
DOI	https://doi.org/10.1007/978-3-030-05789-3_31
Estado	Published - 2019
Evento	Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019 - San Antonio, United States Duración: mar 10 2019 → mar 14 2019

Serie de la publicación

Nombre	Minerals, Metals and Materials Series
ISSN (versión impresa)	2367-1181
ISSN (versión digital)	2367-1696

Conference

Conference	Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019
País/Territorio	United States
Ciudad	San Antonio
Período	3/10/19 → 3/14/19

Nota bibliográfica

Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society.

Financiación

Acknowledgements This work is fully funded by the US Department of Energy, Office of Basic Energy Sciences Project FWP 06SCPE401. I.J.B. acknowledges financial support from the National Science Foundation (NSF CMMI-1729887). BL acknowledges financial support from the National Defense Science and Engineering Graduate (NDSEG) Fellowship. The authors thank Luoning Ma (Johns Hopkins University) for the preparation of TEM specimen.

Financiadores	Número del financiador
Office of Basic Energy Sciences	FWP 06SCPE401
US Department of Energy
National Science Foundation (NSF)	1729887, CMMI-1729887
National Defense Science and Engineering Graduate

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy Engineering and Power Technology
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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title = "Characterization of Staggered Twin Formation in HCP Magnesium",

abstract = "Twins in hexagonal close-packed polycrystals, most often nucleate at grain-boundaries (GBs), propagate into the grain and terminate at opposing GBs. Regularly, multiple parallel twins of the same variant form inside the same grain. When twins terminate inside the grains, rather than the grain boundary, they tend to form a staggered structure. Whether a staggered twin structure or the more common grain spanning twin structure forms can greatly affect mechanical behavior. In this work, the underlying mechanism for the formation of staggered twins is studied using an elasto-visco-plastic fast Fourier transform model, which quantifies the local stresses associated with -type staggered twins in magnesium for different configurations. The model results suggest that when a twin tip is close to the lateral side of another twin, the driving force for twin propagation is significantly reduced. As a result, the staggered twin structure forms.",

keywords = "Crystal plasticity, Deformation twins, Local stresses, Magnesium, Staggered structure",

author = "\{Arul Kumar\}, M. and B. Leu and P. Rottmann and Beyerlein, \{I. J.\}",

note = "Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals \& Materials Society.; Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019 ; Conference date: 10-03-2019 Through 14-03-2019",

year = "2019",

doi = "10.1007/978-3-030-05789-3\_31",

language = "English",

isbn = "9783030057886",

series = "Minerals, Metals and Materials Series",

pages = "207--213",

editor = "Jordon, \{J. Brian\} and Joshi, \{Vineet V.\} and Neelameggham, \{Neale R.\} and Dmytro Orlov",

booktitle = "Magnesium Technology, 2019",

}

Arul Kumar, M, Leu, B, Rottmann, P & Beyerlein, IJ 2019, Characterization of Staggered Twin Formation in HCP Magnesium. En JB Jordon, VV Joshi, NR Neelameggham & D Orlov (eds.), Magnesium Technology, 2019. Minerals, Metals and Materials Series, pp. 207-213, Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019, San Antonio, United States, 3/10/19. https://doi.org/10.1007/978-3-030-05789-3_31

TY - GEN

T1 - Characterization of Staggered Twin Formation in HCP Magnesium

AU - Arul Kumar, M.

AU - Leu, B.

AU - Rottmann, P.

AU - Beyerlein, I. J.

PY - 2019

Y1 - 2019

N2 - Twins in hexagonal close-packed polycrystals, most often nucleate at grain-boundaries (GBs), propagate into the grain and terminate at opposing GBs. Regularly, multiple parallel twins of the same variant form inside the same grain. When twins terminate inside the grains, rather than the grain boundary, they tend to form a staggered structure. Whether a staggered twin structure or the more common grain spanning twin structure forms can greatly affect mechanical behavior. In this work, the underlying mechanism for the formation of staggered twins is studied using an elasto-visco-plastic fast Fourier transform model, which quantifies the local stresses associated with -type staggered twins in magnesium for different configurations. The model results suggest that when a twin tip is close to the lateral side of another twin, the driving force for twin propagation is significantly reduced. As a result, the staggered twin structure forms.

AB - Twins in hexagonal close-packed polycrystals, most often nucleate at grain-boundaries (GBs), propagate into the grain and terminate at opposing GBs. Regularly, multiple parallel twins of the same variant form inside the same grain. When twins terminate inside the grains, rather than the grain boundary, they tend to form a staggered structure. Whether a staggered twin structure or the more common grain spanning twin structure forms can greatly affect mechanical behavior. In this work, the underlying mechanism for the formation of staggered twins is studied using an elasto-visco-plastic fast Fourier transform model, which quantifies the local stresses associated with -type staggered twins in magnesium for different configurations. The model results suggest that when a twin tip is close to the lateral side of another twin, the driving force for twin propagation is significantly reduced. As a result, the staggered twin structure forms.

KW - Crystal plasticity

KW - Deformation twins

KW - Local stresses

KW - Magnesium

KW - Staggered structure

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DO - 10.1007/978-3-030-05789-3_31

M3 - Conference contribution

AN - SCOPUS:85062244782

SN - 9783030057886

T3 - Minerals, Metals and Materials Series

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BT - Magnesium Technology, 2019

A2 - Jordon, J. Brian

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A2 - Neelameggham, Neale R.

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T2 - Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019

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ER -

Characterization of Staggered Twin Formation in HCP Magnesium

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ASJC Scopus subject areas

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