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Title: On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel

Abstract

We report that a recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the cyclic (tension-compression) loading behaviour of an Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel between strain limits of ±1%. Lattice strain measurements acquired via in-situ neutron diffraction were used to further validate the modelling results. An improved prediction of the pronounced Bauschinger effect during unloading is achieved when the reversibility of partial slip in the <112> direction is accounted for. In conclusion, this result indicates a potential contribution of the stress-induced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that de-twinning events could be operative during load reversal.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [3];  [4];  [1]
  1. University of Wollongong, NSW (Australia)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Monash Univ., Melbourne, VIC (Australia)
  4. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1498036
Alternate Identifier(s):
OSTI ID: 1433015
Report Number(s):
LA-UR-15-29463
Journal ID: ISSN 0167-577X
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396; FWP 06SCPE401; W-7405-ENG-36
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Materials Letters
Additional Journal Information:
Journal Volume: 182; Journal Issue: C; Journal ID: ISSN 0167-577X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; TWIP; Neutron diffraction; Simulation and modelling; EPSC; Bauschinger effect

Citation Formats

Saleh, Ahmed A., Clausen, Bjorn, Brown, Donald William, Perelome, Elena V., Davies, Christopher H.J., Tome, Carlos, and Gazder, Azdiar A. On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel. United States: N. p., 2016. Web. doi:10.1016/j.matlet.2016.07.005.
Saleh, Ahmed A., Clausen, Bjorn, Brown, Donald William, Perelome, Elena V., Davies, Christopher H.J., Tome, Carlos, & Gazder, Azdiar A. On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel. United States. doi:10.1016/j.matlet.2016.07.005.
Saleh, Ahmed A., Clausen, Bjorn, Brown, Donald William, Perelome, Elena V., Davies, Christopher H.J., Tome, Carlos, and Gazder, Azdiar A. Mon . "On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel". United States. doi:10.1016/j.matlet.2016.07.005. https://www.osti.gov/servlets/purl/1498036.
@article{osti_1498036,
title = {On the feasibility of partial slip reversal and de-twinning during the cyclic loading of TWIP steel},
author = {Saleh, Ahmed A. and Clausen, Bjorn and Brown, Donald William and Perelome, Elena V. and Davies, Christopher H.J. and Tome, Carlos and Gazder, Azdiar A.},
abstractNote = {We report that a recently modified Elasto-Plastic Self-Consistent (EPSC) model which empirically accounts for both intergranular and intragranular back stresses has been successfully used to simulate the cyclic (tension-compression) loading behaviour of an Fe-24Mn-3Al-2Si-1Ni-0.06C TWinning Induced Plasticity (TWIP) steel between strain limits of ±1%. Lattice strain measurements acquired via in-situ neutron diffraction were used to further validate the modelling results. An improved prediction of the pronounced Bauschinger effect during unloading is achieved when the reversibility of partial slip in the <112> direction is accounted for. In conclusion, this result indicates a potential contribution of the stress-induced separation of partial dislocations to the observed early yielding at the low strain levels employed in this study. It also raises the possibility that de-twinning events could be operative during load reversal.},
doi = {10.1016/j.matlet.2016.07.005},
journal = {Materials Letters},
issn = {0167-577X},
number = C,
volume = 182,
place = {United States},
year = {2016},
month = {7}
}

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Cited by: 4 works
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Figures / Tables:

Figure 1 Figure 1: (a) The experimental and EPSC simulated macroscopic stress-strain curves for Case II. (b) A zoomed-in view of the stress-strain curve when reversing from tension to compression during the first cycle. (c) Comparison between Cases I and II predictions of the evolution of the maximum tensile and compressive stresses.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.