Precipitation kinetics during aging of an alumina-forming austenitic stainless steel
Abstract
The microstructural evolution of DAFA26, an alumina-forming austenitic (AFA) stainless steel, was investigated during aging. The effect of aging at 750 °C and 800 °C on the growth of spherical γ’-Ni3(Al, Ti) particles present in the as-processed state was studied extensively using X-ray diffraction, microhardness testing, scanning electron microscopy, transmission electron microscopy, and atom probe tomography. The γ’ particles had a cube-on-cube orientation relationship with the matrix (i.e. ((010)(010)m//(010)(010)p, [100][100]m//[100][100]p)). The coarsening kinetics of γ’-Ni3Al particles were in agreement with the Lifshitz, Slyozof-Wagner theory. Coarse Laves phase particles were also present in the as-processed state, and during the aging process both smaller Laves phase precipitates and B2-NiAl precipitates formed on both the grain boundaries and in the matrix. As a result, the γ’ precipitates were determined to have the most impact on the room temperature hardness.
- Authors:
-
- Dartmouth College, Hanover, NH (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1252150
- Alternate Identifier(s):
- OSTI ID: 1360851
- Grant/Contract Number:
- AC05-00OR22725; DEFG2612FE0008857
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Additional Journal Information:
- Journal Volume: 667; Journal ID: ISSN 0921-5093
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; austenite; intermetallics; aging; coarsening; grain boundaries; precipitation
Citation Formats
Trotter, Geneva, Hu, Bin, Sun, Annie Y., Harder, Reed, Miller, Michael K., Baker, Ian, and Yao, Lan. Precipitation kinetics during aging of an alumina-forming austenitic stainless steel. United States: N. p., 2016.
Web. doi:10.1016/j.msea.2016.04.081.
Trotter, Geneva, Hu, Bin, Sun, Annie Y., Harder, Reed, Miller, Michael K., Baker, Ian, & Yao, Lan. Precipitation kinetics during aging of an alumina-forming austenitic stainless steel. United States. https://doi.org/10.1016/j.msea.2016.04.081
Trotter, Geneva, Hu, Bin, Sun, Annie Y., Harder, Reed, Miller, Michael K., Baker, Ian, and Yao, Lan. Thu .
"Precipitation kinetics during aging of an alumina-forming austenitic stainless steel". United States. https://doi.org/10.1016/j.msea.2016.04.081. https://www.osti.gov/servlets/purl/1252150.
@article{osti_1252150,
title = {Precipitation kinetics during aging of an alumina-forming austenitic stainless steel},
author = {Trotter, Geneva and Hu, Bin and Sun, Annie Y. and Harder, Reed and Miller, Michael K. and Baker, Ian and Yao, Lan},
abstractNote = {The microstructural evolution of DAFA26, an alumina-forming austenitic (AFA) stainless steel, was investigated during aging. The effect of aging at 750 °C and 800 °C on the growth of spherical γ’-Ni3(Al, Ti) particles present in the as-processed state was studied extensively using X-ray diffraction, microhardness testing, scanning electron microscopy, transmission electron microscopy, and atom probe tomography. The γ’ particles had a cube-on-cube orientation relationship with the matrix (i.e. ((010)(010)m//(010)(010)p, [100][100]m//[100][100]p)). The coarsening kinetics of γ’-Ni3Al particles were in agreement with the Lifshitz, Slyozof-Wagner theory. Coarse Laves phase particles were also present in the as-processed state, and during the aging process both smaller Laves phase precipitates and B2-NiAl precipitates formed on both the grain boundaries and in the matrix. As a result, the γ’ precipitates were determined to have the most impact on the room temperature hardness.},
doi = {10.1016/j.msea.2016.04.081},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = ,
volume = 667,
place = {United States},
year = {Thu Apr 28 00:00:00 EDT 2016},
month = {Thu Apr 28 00:00:00 EDT 2016}
}
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Works referencing / citing this record:
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