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Title: Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling

Abstract

Slip activity from various slip modes largely determines the yield strength and ductility of Mg alloys. Solid solution elements in Mg can change the slip activity dramatically. In this paper, far-field high energy X-ray diffraction microscopy (FF-HEDM) is employed to study slip activity in a Mg-3wt%Y alloy during an in situ tensile experiment. The specimen was incrementally loaded up to 3% engineering strain along the rolling direction. At each load step, FF-HEDM data were collected to track the crystallographic orientation, center of mass, and stress tensor changes of nearly 1000 grains in the probed volume. By analyzing the change in orientation and stress tensor of individual grains at different load steps, it is possible to identify the activated slip systems and measure their critical resolved shear stress (CRSS) values. Prismatic slip and pyramidal I slip are found to be very active in this alloy. The estimated CRSS values for basal slip, prismatic slip and pyramidal I slip are 12 MPa, 38 MPa, and 36 MPa, respectively. These CRSS values were applied in a dislocation-based elastic viscoplastic self-consistent (EVPSC) model that successfully simulated the tensile stress-strain curve from the FF-HEDM experiment. The model also qualitatively predicted the crystal rotation in mostmore » of the selected grains, though it underestimated the internal stress and the magnitude of crystal rotation in these grains. Influence of solute Y on the strength and ductility of Mg alloys is discussed.« less

Authors:
 [1];  [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [4];  [5];  [3];  [6]
  1. Helmholtz-Zentrum Geesthact (Germany); Shanghai Jiao Tong Univ. (China)
  2. Shanghai Jiao Tong Univ. (China)
  3. Helmholtz-Zentrum Geesthacht (Germany)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Shanghai Jiao Tong Univ. (China); Shanghai Innovation Inst. for Materials, Shanghai (China)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation of China; Alexander von Humboldt Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1465754
Alternate Identifier(s):
OSTI ID: 1582808
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 155; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Mg alloy; Solute strengthening; Dislocations; Synchrotron radiation; VPSC

Citation Formats

Wang, Leyun, Huang, Zhonghe, Wang, Huamiao, Maldar, Alireza, Yi, Sangbong, Park, Jun-Sang, Kenesei, Peter, Lilleodden, Erica, and Zeng, Xiaoqin. Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling. United States: N. p., 2018. Web. doi:10.1016/j.actamat.2018.05.065.
Wang, Leyun, Huang, Zhonghe, Wang, Huamiao, Maldar, Alireza, Yi, Sangbong, Park, Jun-Sang, Kenesei, Peter, Lilleodden, Erica, & Zeng, Xiaoqin. Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling. United States. https://doi.org/10.1016/j.actamat.2018.05.065
Wang, Leyun, Huang, Zhonghe, Wang, Huamiao, Maldar, Alireza, Yi, Sangbong, Park, Jun-Sang, Kenesei, Peter, Lilleodden, Erica, and Zeng, Xiaoqin. Thu . "Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling". United States. https://doi.org/10.1016/j.actamat.2018.05.065. https://www.osti.gov/servlets/purl/1465754.
@article{osti_1465754,
title = {Study of slip activity in a Mg-Y alloy by in situ high energy X-ray diffraction microscopy and elastic viscoplastic self-consistent modeling},
author = {Wang, Leyun and Huang, Zhonghe and Wang, Huamiao and Maldar, Alireza and Yi, Sangbong and Park, Jun-Sang and Kenesei, Peter and Lilleodden, Erica and Zeng, Xiaoqin},
abstractNote = {Slip activity from various slip modes largely determines the yield strength and ductility of Mg alloys. Solid solution elements in Mg can change the slip activity dramatically. In this paper, far-field high energy X-ray diffraction microscopy (FF-HEDM) is employed to study slip activity in a Mg-3wt%Y alloy during an in situ tensile experiment. The specimen was incrementally loaded up to 3% engineering strain along the rolling direction. At each load step, FF-HEDM data were collected to track the crystallographic orientation, center of mass, and stress tensor changes of nearly 1000 grains in the probed volume. By analyzing the change in orientation and stress tensor of individual grains at different load steps, it is possible to identify the activated slip systems and measure their critical resolved shear stress (CRSS) values. Prismatic slip and pyramidal I slip are found to be very active in this alloy. The estimated CRSS values for basal slip, prismatic slip and pyramidal I slip are 12 MPa, 38 MPa, and 36 MPa, respectively. These CRSS values were applied in a dislocation-based elastic viscoplastic self-consistent (EVPSC) model that successfully simulated the tensile stress-strain curve from the FF-HEDM experiment. The model also qualitatively predicted the crystal rotation in most of the selected grains, though it underestimated the internal stress and the magnitude of crystal rotation in these grains. Influence of solute Y on the strength and ductility of Mg alloys is discussed.},
doi = {10.1016/j.actamat.2018.05.065},
journal = {Acta Materialia},
number = C,
volume = 155,
place = {United States},
year = {Thu May 31 00:00:00 EDT 2018},
month = {Thu May 31 00:00:00 EDT 2018}
}

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Cited by: 65 works
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Figures / Tables:

Fig. 1 Fig. 1: (a) A schematic of the setup for in situ FF-HEDM experiment. The incoming X-ray (X direction) is parallel to the ND of the specimen; the tensile loading direction (Z) is parallel to the RD of the specimen. (b) Stress-strain curve from the in situ tensile test, in whichmore » the solid symbols represent the immediate flow stress in the specimen after each loading, and the open symbols represent the stress readout after the FF-HEDM measurement of each step.« less

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Works referencing / citing this record:

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