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Large plasticity in magnesium mediated by pyramidal dislocations.
Liu, Bo-Yu; Liu, Fei; Yang, Nan; Zhai, Xiao-Bo; Zhang, Lei; Yang, Yang; Li, Bin; Li, Ju; Ma, Evan; Nie, Jian-Feng; Shan, Zhi-Wei.
Afiliación
  • Liu BY; Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) and Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
  • Liu F; Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) and Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
  • Yang N; Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano) and Hysitron Applied Research Center in China (HARCC), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
  • Zhai XB; College of Science, Xi'an University of Science and Technology, Xi'an 710054, People's Republic of China.
  • Zhang L; MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
  • Yang Y; Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA.
  • Li B; Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA. zwshan@xjtu.edu.cn jianfeng.nie@monash.edu binl@unr.edu.
  • Li J; Departments of Nuclear Science and Engineering and Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • Ma E; Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
  • Nie JF; Department of Materials Science and Engineering, Monash University, Melbourne, Victoria, 3800, Australia. zwshan@xjtu.edu.cn jianfeng.nie@monash.edu binl@unr.edu.
  • Shan ZW; International Joint Laboratory for Light Alloys (Ministry of Education), College of Materials Science and Engineering, Chongqing University, Chongqing 400044, People's Republic of China.
Science ; 365(6448): 73-75, 2019 07 05.
Article en En | MEDLINE | ID: mdl-31273119
Lightweight magnesium alloys are attractive as structural materials for improving energy efficiency in applications such as weight reduction of transportation vehicles. One major obstacle for widespread applications is the limited ductility of magnesium, which has been attributed to [Formula: see text] dislocations failing to accommodate plastic strain. We demonstrate, using in situ transmission electron microscope mechanical testing, that [Formula: see text] dislocations of various characters can accommodate considerable plasticity through gliding on pyramidal planes. We found that submicrometer-size magnesium samples exhibit high plasticity that is far greater than for their bulk counterparts. Small crystal size usually brings high stress, which in turn activates more [Formula: see text] dislocations in magnesium to accommodate plasticity, leading to both high strength and good plasticity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Science Año: 2019 Tipo del documento: Article Pais de publicación: Estados Unidos