Deformation behaviour of nanocrystalline Mg-Al alloys during nanoindentation

Author

Diao, Hui ; Yan, Cheng ; Bell, John ; Li Lu ; Deng, Shengtao ; Zhang, Haifeng ; Zhang, Guangping

Author_Institution

Fac. of Built Environ. & Eng., Queensland Univ. of Technol., Brisbane, QLD, Australia

fYear

2010

Firstpage

1459

Lastpage

1460

Abstract

The deformation behaviour of Mg-5%Al alloys and its dependence with gain size and strain rate were investigated using nanoindentation. The grain sizes were successfully reduced below 100 nm via mechanical alloying method. It was found that the strain rate sensitivity increased with decreasing grain size. The smaller activation volumes and the plastic deformation mechanisms involving grain boundary activities are considered to contribute to the increase of strain rate sensitivity in the nanocrystalline alloys.

Keywords

aluminium alloys; deformation; grain boundaries; grain size; magnesium alloys; mechanical alloying; nanoindentation; nanostructured materials; MgAl; activation volumes; deformation behaviour; grain boundary; grain size; mechanical alloying; nanocrystalline alloys; nanoindentation; plastic deformation mechanisms; strain rate; Alloying; Capacitive sensors; Grain size; Inorganic materials; Materials science and technology; Mechanical engineering; Microstructure; Milling; Plastics; Systems engineering and theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoelectronics Conference (INEC), 2010 3rd International

Conference_Location

Hong Kong

Print_ISBN

978-1-4244-3543-2

Electronic_ISBN

978-1-4244-3544-9

Type

conf

DOI

10.1109/INEC.2010.5424788

Filename

5424788