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

Abstract

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:
 [1];  [2];  [3];  [2]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  3. Tsinghua Univ., Beijing (China)
Publication Date:
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)
OSTI Identifier:
1327599
Alternate Identifier(s):
OSTI ID: 1359240
Grant/Contract Number:  
AC05-00OR22725; AC02-06CH11357
Resource 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
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Metals and alloys; Mechanical properties; X-ray diffraction; Microstructure

Citation Formats

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., 2016. Web. doi:10.1016/j.jallcom.2016.05.144.
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.
Wu, Wei, Chuang, Chih-Pin, Qiao, Dongxiao, Ren, Yang, and An, Ke. Sun . "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.
@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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Works referencing / citing this record:

On the relationship between and conjugate twins and double extension twins in rolled pure Mg
journal, February 2017