Load partitioning between the bcc-iron matrix and NiAl-type precipitates in a ferritic alloy on multiple length scales
Abstract
Our understanding of load sharing among constituent phases aids us in designing mechanical properties of multiphase materials. We investigate load partitioning between the body-centered-cubic iron matrix and NiAl-type precipitates in a ferritic alloy during uniaxial tensile tests at 364 and 506 °C on multiple length scales by in situ neutron diffraction and crystal plasticity finite element modeling. Our findings show that the macroscopic load-transfer efficiency is not as high as that predicted by the Eshelby model; moreover, it depends on the matrix strain-hardening behavior. We also explain the grain-level anisotropic load-partitioning behavior by considering the plastic anisotropy of the matrix and elastic anisotropy of precipitates. We further demonstrate that the partitioned load on NiAl-type precipitates relaxes at 506 °C, most likely through thermally-activated dislocation rearrangement on the microscopic scale. Finally, this study contributes to further understanding of load-partitioning characteristics in multiphase materials.
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1250417
- Alternate Identifier(s):
- OSTI ID: 1304706
- Report Number(s):
- LA-UR-15-21360
Journal ID: ISSN 2045-2322
- Grant/Contract Number:
- AC05-00OR22725; AC52-06NA25396; 09NT0008089; FE0005868; FE0011194; FE0024054
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; composites; mechanical properties; metals and alloys; Neutron Diffraction
Citation Formats
Sun, Zhiqian, Song, Gian, Sisneros, Thomas A., Clausen, Bjorn, Pu, Chao, Li, Lin, Gao, Yanfei, and Liaw, Peter K. Load partitioning between the bcc-iron matrix and NiAl-type precipitates in a ferritic alloy on multiple length scales. United States: N. p., 2016.
Web. doi:10.1038/srep23137.
Sun, Zhiqian, Song, Gian, Sisneros, Thomas A., Clausen, Bjorn, Pu, Chao, Li, Lin, Gao, Yanfei, & Liaw, Peter K. Load partitioning between the bcc-iron matrix and NiAl-type precipitates in a ferritic alloy on multiple length scales. United States. https://doi.org/10.1038/srep23137
Sun, Zhiqian, Song, Gian, Sisneros, Thomas A., Clausen, Bjorn, Pu, Chao, Li, Lin, Gao, Yanfei, and Liaw, Peter K. Wed .
"Load partitioning between the bcc-iron matrix and NiAl-type precipitates in a ferritic alloy on multiple length scales". United States. https://doi.org/10.1038/srep23137. https://www.osti.gov/servlets/purl/1250417.
@article{osti_1250417,
title = {Load partitioning between the bcc-iron matrix and NiAl-type precipitates in a ferritic alloy on multiple length scales},
author = {Sun, Zhiqian and Song, Gian and Sisneros, Thomas A. and Clausen, Bjorn and Pu, Chao and Li, Lin and Gao, Yanfei and Liaw, Peter K.},
abstractNote = {Our understanding of load sharing among constituent phases aids us in designing mechanical properties of multiphase materials. We investigate load partitioning between the body-centered-cubic iron matrix and NiAl-type precipitates in a ferritic alloy during uniaxial tensile tests at 364 and 506 °C on multiple length scales by in situ neutron diffraction and crystal plasticity finite element modeling. Our findings show that the macroscopic load-transfer efficiency is not as high as that predicted by the Eshelby model; moreover, it depends on the matrix strain-hardening behavior. We also explain the grain-level anisotropic load-partitioning behavior by considering the plastic anisotropy of the matrix and elastic anisotropy of precipitates. We further demonstrate that the partitioned load on NiAl-type precipitates relaxes at 506 °C, most likely through thermally-activated dislocation rearrangement on the microscopic scale. Finally, this study contributes to further understanding of load-partitioning characteristics in multiphase materials.},
doi = {10.1038/srep23137},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Wed Mar 16 00:00:00 EDT 2016},
month = {Wed Mar 16 00:00:00 EDT 2016}
}
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