Imperial College London
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ProfessorDavidDye

Faculty of Engineering, Department of Materials

Professor of Metallurgy
 
 
 
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Contact

 

+44 (0)20 7594 6811david.dye

 
 
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Location

 

1.09GoldsmithSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{McAuliffe:2020,
author = {McAuliffe, TP and Ackerman, AK and Savitzky, BH and Kwok, TWJ and Danaie, M and Ophus, C and Dye, D},
publisher = {arXiv},
title = {4D-STEM elastic stress state characterisation of a TWIP steel nanotwin},
url = {http://arxiv.org/abs/2004.03982v1},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - We measure the stress state in and around a deformation nanotwin in atwinning-induced plasticity (TWIP) steel. Using four dimensional scanningtransmission electron microscopy (4D-STEM), we measure the elastic strain fieldin a 68.2-by-83.1 nm area of interest with a scan step of 0.36 nm and adiffraction limit resolution of 0.73 nm. The stress field in and surroundingthe twin matches the form expected from analytical theory and is on the orderof 15 GPa, close to the theoretical strength of the material. We infer that themeasured back-stress limits twin thickening, providing rationale for why TWIPsteel twins remain thin, continuously dividing grains to give substantial workhardening. Our results support modern mechanistic understanding of theinfluence of twinning on crack propagation and embrittlement in TWIP steels.
AU  - McAuliffe,TP
AU  - Ackerman,AK
AU  - Savitzky,BH
AU  - Kwok,TWJ
AU  - Danaie,M
AU  - Ophus,C
AU  - Dye,D
PB  - arXiv
PY  - 2020///
TI  - 4D-STEM elastic stress state characterisation of a TWIP steel nanotwin
UR  - http://arxiv.org/abs/2004.03982v1
UR  - https://arxiv.org/abs/2004.03982v1
UR  - http://hdl.handle.net/10044/1/78653
ER  -
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