Indentation size effect and strain rate sensitivity of nanocrystalline Mg-Al alloys


Autoria(s): Diao, Hui; Yan, Cheng; Bell, John; Lu, Li; Zhang, Guangping
Data(s)

2010

Resumo

Deformation Behaviour of microcrystalline (mc) and nanocrystalline (nc) Mg-5%Al alloys produced by hot extrusion of ball-milled powders were investigated using instrumented indentation tests. The hardness values of the mc and nc metals exhibited indentation size effect (ISE), with nc alloys showing weaker ISE. The highly localized dislocation activities resulted in a small activation volume, hence enhanced strain rate sensitivity. Relative higher strain rate sensitivity and the negative Hall-Petch Relationship suggested the increasingly important role of grain boundary mediated mechanisms when the grain size decreased to nanometer region.

Formato

application/pdf

Identificador

http://eprints.qut.edu.au/38110/

Relação

http://eprints.qut.edu.au/38110/1/c38110.pdf

http://www.wceam.com/weblease/tp8/default.cfm?idClient=954

Diao, Hui, Yan, Cheng, Bell, John, Lu, Li, & Zhang, Guangping (2010) Indentation size effect and strain rate sensitivity of nanocrystalline Mg-Al alloys. In 5th World Congress on Engineering Asset Management (WCEAM-AGIC 2010), 25-27 October 2010, Brisbane Convention & Exhibition Centre, Brisbane.

Direitos

Copyright 2010 Please consult the authors.

Fonte

Faculty of Built Environment and Engineering; School of Engineering Systems

Palavras-Chave #091200 MATERIALS ENGINEERING #nanocrystalline Mg alloy #strain rate sensitivity #indentation size effect #deformation mechanism
Tipo

Conference Paper