期刊
WEAR
卷 280, 期 -, 页码 28-35出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2012.01.012
关键词
Titanium; High-pressure torsion; Surface plastic deformation; Wedge forming; Abrasive wear
资金
- School of Engineering Sciences at the University of Southampton
- China Scholarship Council
- EPSRC [EP/D00313X/1]
- National Science Foundation of the United States [DMR-0855009]
- EPSRC [EP/F034296/1, EP/D00313X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/D00313X/1, EP/F034296/1] Funding Source: researchfish
The micro-wear behavior of commercial pure Ti was investigated before and after processing by high-pressure torsion (HPT) to provide comparisons over a range of grain sizes. The HPT-processed Ti had an average grain size of similar to 130 nm while the as-received and HPT plus annealed samples had grain sizes of similar to 8.6 mu m and similar to 607 nm, respectively. The results show all Ti samples have a similar dynamic coefficient of friction but different wear mechanisms. Wear of the coarse grained (CG) Ti showed extensive plastic deformation and wedge formation which produced large wear debris whereas wear of the ultra-fine grained (UFG) Ti was dominated by abrasive wear mechanisms and produced small wear debris. In addition, the UFG Ti showed a more homogenous wear grooving and a lower wear rate than CG Ti which suggests that UFG Ti is more suitable for wear applications. (c) 2012 Elsevier B.V. All rights reserved.
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