Removal and fracture characteristics of cemented tungsten carbide under nanoindenting and nanoscratching
Irwan, Rudy and Huang, Han (2010). Removal and fracture characteristics of cemented tungsten carbide under nanoindenting and nanoscratching. In: Jianhong Zhao, Masanori Kunieda, Guilin Yang and Xue-Ming Yuan, Advances in Precision Engineering. International Conference on Precision Engineering (ICoPE2010 and 13th ICPE), Singapore, Republic of Singapore, (16-20). 28-30 July 2010. doi:10.4028/www.scientific.net/KEM.447-448.16
(Some files may be inaccessible until you login with your UQ eSpace credentials)
Nanoindenting and nanoscratching were used to investigate removal and fracture characteristics of cemented tungsten carbide (cWC). Nanoindentation results indicated that the elastic modulus and hardness of WC grains were significantly greater than those measured in cobalt binder rich regions, respectively. Few evidences of cracking or fracture were observed on the indented surfaces using both in-situ atomic force microscopy and scanning electron microscopy. However, the pop-in events were observed from indenting load-displacement curves and the corresponding acoustic emissions were detected, indicating the occurrences of brittle fracture. Nanoscratch results demonstrated that similar removal characteristics existed, but cracking was observed in both surface and subsurface of the scratched samples.