Imperial College London
Emeritus Professor Colin Atkinson

Emeritus ProfessorColinAtkinson

Faculty of Natural Sciences, Department of Mathematics

Emeritus Professor
 
 
 
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Contact

 

+44 (0)20 7594 8497c.atkinson

 
 
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Location

 

671Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Barba:2017:10.1016/j.actamat.2017.05.072,
author = {Barba, D and Alabort, E and Pedrazzini, S and Collins, DM and Wilkinson, AJ and Bagot, PAJ and Moody, MP and Atkinson, C and Jerusalem, A and Reed, RC},
doi = {10.1016/j.actamat.2017.05.072},
journal = {Acta Materialia},
pages = {314--329},
title = {On the microtwinning mechanism in a single crystal superalloy},
url = {http://dx.doi.org/10.1016/j.actamat.2017.05.072},
volume = {135},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The contribution of a microtwinning mechanism to the creep deformation behaviour of single crystal superalloy MD2 is studied. Microtwinning is prevalent for uniaxial loading along at for the stress range 625 to  MPa and for 625 MPa. Using quantitative stereology, the twin fraction and twin thickness are estimated; this allows the accumulated creep strain to be recovered, in turn supporting the role of the microtwinning mode in conferring deformation. Atom probe tomography confirms the segregation of Cr and Co at the twin/parent interface, consistent with the lowering of the stacking fault energy needed to support twin lengthening and thickening. A model for diffusion-controlled growth of twins is proposed and it is used to recover the measured creep strain rate. The work provides the basis for a thermo-mechanical constitutive model of deformation consistent with the microtwinning mechanism.
AU  - Barba,D
AU  - Alabort,E
AU  - Pedrazzini,S
AU  - Collins,DM
AU  - Wilkinson,AJ
AU  - Bagot,PAJ
AU  - Moody,MP
AU  - Atkinson,C
AU  - Jerusalem,A
AU  - Reed,RC
DO  - 10.1016/j.actamat.2017.05.072
EP  - 329
PY  - 2017///
SN  - 1359-6454
SP  - 314
TI  - On the microtwinning mechanism in a single crystal superalloy
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2017.05.072
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000407536800032&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S1359645417304615
UR  - http://hdl.handle.net/10044/1/63276
VL  - 135
ER  -
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