Imperial College London
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DrStellaPedrazzini

Faculty of Engineering, Department of Materials

Senior Lecturer
 
 
 
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Contact

 

s.pedrazzini Website

 
 
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Location

 

1.18Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pedrazzini:2016:10.1016/j.msea.2016.07.007,
author = {Pedrazzini, S and Galano, M and Audebert, F and Collins, DM and Hofmann, F and Abbey, B and Korsunsky, AM and Lieblich, M and Garcia, Escorial A and Smith, GDW},
doi = {10.1016/j.msea.2016.07.007},
journal = {Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing},
pages = {175--183},
title = {Strengthening mechanisms in an Al-Fe-Cr-Ti nano-quasicrystalline alloy and composites},
url = {http://dx.doi.org/10.1016/j.msea.2016.07.007},
volume = {672},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We report a study of the structure-processing-property relationships in a high strength Al93Fe3Cr2Ti2 nano-quasicrystalline alloy and composites containing 10 and 20 vol% ductilising pure Al fibres. The superimposed contributions of several different strengthening mechanisms have been modelled analytically using data obtained from systematic characterisation of the monolithic alloy bar. An observed yield strength of 544 MPa has been substantiated from a combination of solid solution strengthening, work hardening, precipitation hardening and Hall-Petch grain size dependent effects. These materials have been shown by other authors in previous published work to be highly sensitive to the size distribution of particles in the powder from which they are made, and the subsequent thermomechanical processing conditions. The processing condition employed in this study provided micron-sized grains with a strong [111] preferential orientation along the extrusion direction and a bimodal size distribution of the icosahedral nano-quasicrystalline precipitates. Both were deemed to be a significant contributor to the high yield strength observed. The addition of pure Al fibres was found to decrease the yield strength linearly with increasing Al content, and to augment the ductility of the composites.
AU  - Pedrazzini,S
AU  - Galano,M
AU  - Audebert,F
AU  - Collins,DM
AU  - Hofmann,F
AU  - Abbey,B
AU  - Korsunsky,AM
AU  - Lieblich,M
AU  - Garcia,Escorial A
AU  - Smith,GDW
DO  - 10.1016/j.msea.2016.07.007
EP  - 183
PY  - 2016///
SN  - 0921-5093
SP  - 175
TI  - Strengthening mechanisms in an Al-Fe-Cr-Ti nano-quasicrystalline alloy and composites
T2  - Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing
UR  - http://dx.doi.org/10.1016/j.msea.2016.07.007
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000381952300021&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/64127
VL  - 672
ER  -
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