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Title: In-situ neutron diffraction study on the tension-compression fatigue behavior of a twinning induced plasticity steel

Abstract

Grain orientation dependent behavior during tension-compression type of fatigue loading in a TWIP steel was studied using in-situ neutron diffraction. Orientation zones with dominant behavior of (1) twinning-de-twinning, (2) twinning-re-twinning followed by twinning-de-twinning, (3) twinning followed by dislocation slip and (4) dislocation slip were identified. Jumps of the orientation density were evidenced in neutron diffraction peaks which explains the macroscopic asymmetric behavior. The asymmetric behavior in early stage of fatigue loading is mainly due to small volume fraction of twins in comparison with that at later stage. As a result, easy activation of the de-twin makes the macroscopically unloading behavior nonlinear.

Authors:
 [1];  [2];  [1];  [2];  [2];  [2];  [2];  [3];  [2];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Science and Technology Beijing, Beijing (China)
  3. Jiangsu Univ. of Science and Technology, Jiangsu (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
OSTI Identifier:
1357973
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 137; Journal Issue: C; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; twinning; detwinning; retwinning; fatigue; neutron diffraction

Citation Formats

Xie, Qingge, Liang, Jiangtao, Stoica, Alexandru Dan, Li, Ruifeng, Yang, Ping, Zhao, Zhengzhi, Wang, Janguo, Lan, Haoyu, Li, Rungang, and An, Ke. In-situ neutron diffraction study on the tension-compression fatigue behavior of a twinning induced plasticity steel. United States: N. p., 2017. Web. doi:10.1016/j.scriptamat.2017.04.041.
Xie, Qingge, Liang, Jiangtao, Stoica, Alexandru Dan, Li, Ruifeng, Yang, Ping, Zhao, Zhengzhi, Wang, Janguo, Lan, Haoyu, Li, Rungang, & An, Ke. In-situ neutron diffraction study on the tension-compression fatigue behavior of a twinning induced plasticity steel. United States. doi:10.1016/j.scriptamat.2017.04.041.
Xie, Qingge, Liang, Jiangtao, Stoica, Alexandru Dan, Li, Ruifeng, Yang, Ping, Zhao, Zhengzhi, Wang, Janguo, Lan, Haoyu, Li, Rungang, and An, Ke. Wed . "In-situ neutron diffraction study on the tension-compression fatigue behavior of a twinning induced plasticity steel". United States. doi:10.1016/j.scriptamat.2017.04.041. https://www.osti.gov/servlets/purl/1357973.
@article{osti_1357973,
title = {In-situ neutron diffraction study on the tension-compression fatigue behavior of a twinning induced plasticity steel},
author = {Xie, Qingge and Liang, Jiangtao and Stoica, Alexandru Dan and Li, Ruifeng and Yang, Ping and Zhao, Zhengzhi and Wang, Janguo and Lan, Haoyu and Li, Rungang and An, Ke},
abstractNote = {Grain orientation dependent behavior during tension-compression type of fatigue loading in a TWIP steel was studied using in-situ neutron diffraction. Orientation zones with dominant behavior of (1) twinning-de-twinning, (2) twinning-re-twinning followed by twinning-de-twinning, (3) twinning followed by dislocation slip and (4) dislocation slip were identified. Jumps of the orientation density were evidenced in neutron diffraction peaks which explains the macroscopic asymmetric behavior. The asymmetric behavior in early stage of fatigue loading is mainly due to small volume fraction of twins in comparison with that at later stage. As a result, easy activation of the de-twin makes the macroscopically unloading behavior nonlinear.},
doi = {10.1016/j.scriptamat.2017.04.041},
journal = {Scripta Materialia},
number = C,
volume = 137,
place = {United States},
year = {Wed May 17 00:00:00 EDT 2017},
month = {Wed May 17 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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  • In-situ neutron diffraction during cyclic tension-compression loading (∼+3.5% to −2.8%) of a 17Mn-3Al-2Si-1Ni-0.06C steel that exhibits concurrent transformation and twinning -induced plasticity effects indicated a significant contribution of intragranular back stresses to the observed Bauschinger effect. Rietveld analysis revealed a higher rate of martensitic transformation during tension compared to compression. Throughout cycling, α′-martensite exhibited the highest phase strains such that it bears an increasing portion of the macroscopic load as its weight fraction evolves. On the other hand, the ε-martensite strain remained compressive as it accommodated most of the internal strains caused by the shape misfit associated with the γ→εmore » and/or ε→α′ transformations.« less
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