Examining the influence of stacking fault width on deformation twinning in an austenitic stainless steel

G. Meric de Bellefon; M. N. Gussev; A. D. Stoica; J. C. van Duysen; K. Sridharan

doi:10.1016/j.scriptamat.2018.08.012

Examining the influence of stacking fault width on deformation twinning in an austenitic stainless steel

G. Meric de Bellefon, M. N. Gussev, A. D. Stoica, J. C. van Duysen, K. Sridharan

Nuclear Fuel Element Performance

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27 Scopus citations

Abstract

Two austenitic stainless steels (SS) were designed to exhibit close to the largest possible difference in stacking fault energy (SFE) while staying within specifications. Neutron diffraction and scanning electron microscopy electron backscatter diffraction analysis were used to quantify stacking fault widths and deformation twinning, respectively, during room temperature straining. While the low-SFE SS exhibits much wider stacking faults (19 nm) throughout deformation as compared to the high-SFE SS (12 nm), the difference in twinning is less pronounced, with a slightly lower stress (50–100 MPa lower) and lower strain (5–10%) for twinning onset in the low-SFE SS.

Original language	English
Pages (from-to)	162-166
Number of pages	5
Journal	Scripta Materialia
Volume	157
DOIs	https://doi.org/10.1016/j.scriptamat.2018.08.012
State	Published - Dec 2018

Funding

GMB gratefully acknowledges the U.S. Department of Energy for an Integrated University Program Graduate Fellowship. The authors acknowledge Oak Ridge National Laboratory's Scientific User Facilities Division and U.S. Department of Energy's Office of Basic Energy Sciences for the neutron diffraction experiment at the Spallation Neutron Source, Matthew Frost and Ke An for their technical guidance on neutron diffraction, the National Science Foundation for use of the University of Wisconsin Materials Research Science and Engineering Center (DMR-1720415), and Dr. Terrani and Dr. Yamamoto for fabrication of the test materials. This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy . The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy

Keywords

Austenitic 316 stainless steel
Deformation twinning
Neutron diffraction
Stacking fault energy

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10.1016/j.scriptamat.2018.08.012

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abstract = "Two austenitic stainless steels (SS) were designed to exhibit close to the largest possible difference in stacking fault energy (SFE) while staying within specifications. Neutron diffraction and scanning electron microscopy electron backscatter diffraction analysis were used to quantify stacking fault widths and deformation twinning, respectively, during room temperature straining. While the low-SFE SS exhibits much wider stacking faults (19 nm) throughout deformation as compared to the high-SFE SS (12 nm), the difference in twinning is less pronounced, with a slightly lower stress (50–100 MPa lower) and lower strain (5–10%) for twinning onset in the low-SFE SS.",

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AU - Meric de Bellefon, G.

AU - Gussev, M. N.

AU - Stoica, A. D.

AU - van Duysen, J. C.

AU - Sridharan, K.

PY - 2018/12

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N2 - Two austenitic stainless steels (SS) were designed to exhibit close to the largest possible difference in stacking fault energy (SFE) while staying within specifications. Neutron diffraction and scanning electron microscopy electron backscatter diffraction analysis were used to quantify stacking fault widths and deformation twinning, respectively, during room temperature straining. While the low-SFE SS exhibits much wider stacking faults (19 nm) throughout deformation as compared to the high-SFE SS (12 nm), the difference in twinning is less pronounced, with a slightly lower stress (50–100 MPa lower) and lower strain (5–10%) for twinning onset in the low-SFE SS.

AB - Two austenitic stainless steels (SS) were designed to exhibit close to the largest possible difference in stacking fault energy (SFE) while staying within specifications. Neutron diffraction and scanning electron microscopy electron backscatter diffraction analysis were used to quantify stacking fault widths and deformation twinning, respectively, during room temperature straining. While the low-SFE SS exhibits much wider stacking faults (19 nm) throughout deformation as compared to the high-SFE SS (12 nm), the difference in twinning is less pronounced, with a slightly lower stress (50–100 MPa lower) and lower strain (5–10%) for twinning onset in the low-SFE SS.

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Examining the influence of stacking fault width on deformation twinning in an austenitic stainless steel

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