Microscale residual stresses in additively manufactured stainless steel
Abstract
Additively manufactured (AM) metallic materials commonly possess substantial microscale internal stresses that manifest as intergranular and intragranular residual stresses. However, the impact of these residual stresses on the mechanical behaviour of AM materials remains unexplored. Here we combine in situ synchrotron X-ray diffraction experiments and computational modelling to quantify the lattice strains in different families of grains with specific orientations and associated intergranular residual stresses in an AM 316L stainless steel under uniaxial tension. We measure pronounced tension–compression asymmetries in yield strength and work hardening for as-printed stainless steel, and show they are associated with back stresses originating from heterogeneous dislocation distributions and resultant intragranular residual stresses. We further report that heat treatment relieves microscale residual stresses, thereby reducing the tension–compression asymmetries and altering work-hardening behaviour. This work establishes the mechanistic connections between the microscale residual stresses and mechanical behaviour of AM stainless steel.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Georgia Inst. of Technology, Atlanta, GA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1566796
- Report Number(s):
- LLNL-JRNL-789087
Journal ID: ISSN 2041-1723; 986990
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Chen, Wen, Voisin, Thomas, Zhang, Yin, Florien, Jean-Baptiste, Spadaccini, Christopher M., McDowell, David L., Zhu, Ting, and Wang, Y. Morris. Microscale residual stresses in additively manufactured stainless steel. United States: N. p., 2019.
Web. doi:10.1038/s41467-019-12265-8.
Chen, Wen, Voisin, Thomas, Zhang, Yin, Florien, Jean-Baptiste, Spadaccini, Christopher M., McDowell, David L., Zhu, Ting, & Wang, Y. Morris. Microscale residual stresses in additively manufactured stainless steel. United States. https://doi.org/10.1038/s41467-019-12265-8
Chen, Wen, Voisin, Thomas, Zhang, Yin, Florien, Jean-Baptiste, Spadaccini, Christopher M., McDowell, David L., Zhu, Ting, and Wang, Y. Morris. Wed .
"Microscale residual stresses in additively manufactured stainless steel". United States. https://doi.org/10.1038/s41467-019-12265-8. https://www.osti.gov/servlets/purl/1566796.
@article{osti_1566796,
title = {Microscale residual stresses in additively manufactured stainless steel},
author = {Chen, Wen and Voisin, Thomas and Zhang, Yin and Florien, Jean-Baptiste and Spadaccini, Christopher M. and McDowell, David L. and Zhu, Ting and Wang, Y. Morris},
abstractNote = {Additively manufactured (AM) metallic materials commonly possess substantial microscale internal stresses that manifest as intergranular and intragranular residual stresses. However, the impact of these residual stresses on the mechanical behaviour of AM materials remains unexplored. Here we combine in situ synchrotron X-ray diffraction experiments and computational modelling to quantify the lattice strains in different families of grains with specific orientations and associated intergranular residual stresses in an AM 316L stainless steel under uniaxial tension. We measure pronounced tension–compression asymmetries in yield strength and work hardening for as-printed stainless steel, and show they are associated with back stresses originating from heterogeneous dislocation distributions and resultant intragranular residual stresses. We further report that heat treatment relieves microscale residual stresses, thereby reducing the tension–compression asymmetries and altering work-hardening behaviour. This work establishes the mechanistic connections between the microscale residual stresses and mechanical behaviour of AM stainless steel.},
doi = {10.1038/s41467-019-12265-8},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {Wed Sep 25 00:00:00 EDT 2019},
month = {Wed Sep 25 00:00:00 EDT 2019}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
The origin of high-density dislocations in additively manufactured metals
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The origin of high-density dislocations in additively manufactured metals
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Figures / Tables found in this record: