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

Wu, Wei; Chuang, Chih-Pin; Qiao, Dongxiao; Ren, Yang; An, Ke

doi:10.1016/j.jallcom.2016.05.144

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

Journal Article · Sun May 15 00:00:00 EDT 2016 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2016.05.144· OSTI ID:1327599

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

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)

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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source

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

Grant/Contract Number:: AC02-06CH11357; AC05-00OR22725

OSTI ID:: 1327599

Alternate ID(s):: OSTI ID: 1359240

Journal Information:: Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Journal Issue: C Vol. 683; ISSN 0925-8388

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method Wu, Wei; Stoica, Alexandru; Yu, Dunji Crystals, Vol. 8, Issue 9 https://doi.org/10.3390/cryst8090348	journal	August 2018

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