Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

doi:10.1016/j.jallcom.2016.05.144

Title: Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

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We employed a specially designed semi-circular notch specimen in the current study to generate the various strain conditions, including uniaxial, biaxial, shear, and plane strains, which was utilized to explore the evolution of different deformation twinning systems under complex loading conditions. We found that when using in situ synchrotron X-ray diffraction mapping method, that the extensive double twins were activated during loading, while nearly no extension twinning activity was detected. After the formation of {10.1} and {10.3} compression twins, they transformed into {10.1}-{10.2} and {10.3}-{10.2} double twins instantaneously at the early stage of deformation. The lattice strain evolutions in different hkls were mapped at selected load levels during the loading-unloading sequence. Finally, the relationship between the macroscopic straining and microscopic response was established.

Authors:

Wu, Wei ^[1] ; Chuang, Chih-Pin ^[2] ; Qiao, Dongxiao ^[3] ; Ren, Yang ^[2] ;

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
Tsinghua Univ., Beijing (China)

Publication Date:: 2016-05-15

Grant/Contract Number:: AC05-00OR22725

Type:: Accepted Manuscript

Journal Name:: Journal of Alloys and Compounds

Additional Journal Information:: Journal Volume: 683; Journal Issue: C; Journal ID: ISSN 0925-8388

Publisher:: Elsevier

Research Org:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Org:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Metals and alloys; Mechanical properties; X-ray diffraction; Microstructure

OSTI Identifier:: 1327599

Alternate Identifier(s):: OSTI ID: 1359240


                    Wu, Wei, Chuang, Chih-Pin, Qiao, Dongxiao, Ren, Yang, and An, Ke. Investigation of deformation twinning under complex stress states in a rolled magnesium alloy.  United States: N. p.,  
        Web.  doi:10.1016/j.jallcom.2016.05.144.

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                    Wu, Wei, Chuang, Chih-Pin, Qiao, Dongxiao, Ren, Yang, & An, Ke. Investigation of deformation twinning under complex stress states in a rolled magnesium alloy.  United States.  doi:10.1016/j.jallcom.2016.05.144.

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                    Wu, Wei, Chuang, Chih-Pin, Qiao, Dongxiao, Ren, Yang, and An, Ke. 2016.  
        "Investigation of deformation twinning under complex stress states in a rolled magnesium alloy".  United States.  
        doi:10.1016/j.jallcom.2016.05.144.  https://www.osti.gov/servlets/purl/1327599.

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@article{osti_1327599,

  title        = {Investigation of deformation twinning under complex stress states in a rolled magnesium alloy},

  author       = {Wu, Wei and Chuang, Chih-Pin and Qiao, Dongxiao and Ren, Yang and An, Ke},

  abstractNote = {We employed a specially designed semi-circular notch specimen in the current study to generate the various strain conditions, including uniaxial, biaxial, shear, and plane strains, which was utilized to explore the evolution of different deformation twinning systems under complex loading conditions. We found that when using in situ synchrotron X-ray diffraction mapping method, that the extensive double twins were activated during loading, while nearly no extension twinning activity was detected. After the formation of {10.1} and {10.3} compression twins, they transformed into {10.1}-{10.2} and {10.3}-{10.2} double twins instantaneously at the early stage of deformation. The lattice strain evolutions in different hkls were mapped at selected load levels during the loading-unloading sequence. Finally, the relationship between the macroscopic straining and microscopic response was established.},

  doi          = {10.1016/j.jallcom.2016.05.144},

  journal      = {Journal of Alloys and Compounds},

  number       = C,

  volume       = 683,

  place        = {United States},

  year         = {2016},

  month        = {5}

}

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10.1016/j.jallcom.2016.05.144
https://doi.org/10.1016/j.jallcom.2016.05.144

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Title: Investigation of deformation twinning under complex stress states in a rolled magnesium alloy

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