Mechanical properties and fracture characteristics of cemented tungsten carbine with fine microstructure studied by nanoidentation

Irwan, Rudy and Huang, Han (2008) Mechanical properties and fracture characteristics of cemented tungsten carbine with fine microstructure studied by nanoidentation. International Journal of Surface Science and Engineering, 2 1/2: 29-40. doi:10.1504/IJSURFSE.2008.018966


Author Irwan, Rudy
Huang, Han
Title Mechanical properties and fracture characteristics of cemented tungsten carbine with fine microstructure studied by nanoidentation
Journal name International Journal of Surface Science and Engineering   Check publisher's open access policy
ISSN 1749-7868
1749-785X
Publication date 2008-05-13
Year available 2008
Sub-type Article (original research)
DOI 10.1504/IJSURFSE.2008.018966
Open Access Status
Volume 2
Issue 1/2
Start page 29
End page 40
Total pages 12
Place of publication United Kingdom
Publisher Inderscience Publishers
Language eng
Subject 091006 Manufacturing Processes and Technologies (excl. Textiles)
09 Engineering
0913 Mechanical Engineering
099999 Engineering not elsewhere classified
Abstract Nanoindentation was used to investigate mechanical properties and fracture characteristics of cemented tungsten carbide with fine microstructure. The elastic modulus and hardness of tungsten carbide grains were found to be significantly greater than those measured in cobalt binder rich regions, respectively. From the indented surfaces, very few evidences of cracking or fragmentation were observed using in-situ atomic force microscopy. However, the pop-in events were observed from the indentation load-displacement relationships and the acoustic emissions were detected during indenting processes, indicating the occurrences of brittle fracture. The latter observations were explained using a hypothesis that the fracture of the material under nanoindentation was mainly via sharp corner breaking due to the crash of individual tungsten carbide grains.
Keyword Nanoindentation
Tungsten carbide
Elastic modulus
Hardness
Microstructure
Fracture characteristics
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID DP0557349
Institutional Status UQ

 
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Created: Sat, 04 Apr 2009, 00:02:33 EST by Rose Clements on behalf of Faculty Of Engineering, Architecture & Info Tech