Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method
Source abstract
Abstract
The tribological behaviors of NiTi alloy produced by the spark plasma sintering (SPS) method before and after annealing were investigated at various loading conditions via indentation, scratch, and wear tests. Indentation tests were performed by a pyramidal Berkovich indenter, while scratch and wear tests were carried out by a diamond Rockwell spherical indenter at room temperature. The annealing of the as-prepared samples was performed at 350, 450, and 550 °C in the ambient atmosphere. The influence of the annealing temperature on the sample behavior towards tribological study was investigated here. The results indicated that the alloy annealed at 350 °C showed a higher hardness compared to the other annealed alloys. The scratch and wear resistance of the annealed sample at 350 °C showed a better performance in comparison to the other samples under a constant load. The high wear resistance of the annealed NiTi alloy may be attributed to its metastable R-phase. The detection and evaluation of acoustic emissions during the nano/micro-tribomechanical testing proved to be a very effective way for the exploration of the durability of SPS NiTi alloys.
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Research context
OpenAlex topics: Shape Memory Alloy Transformations · Metal and Thin Film Mechanics · Titanium Alloys Microstructure and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Functional Materials, FZU-Institute of Physics of the Czech Academy of Sciences, Na Slovance 1992/2, 182 21 Prague, Czech Republic
Central Laboratories, University of Chemistry and Technology, Prague (UCT Prague), 166 28 Prague, Czech Republic
Joint Laboratory of Optics of Palacký University and Institute of Physics AS CR, Faculty of Science, Palacký University in Olomouc, 17 Listopadu 50a, 772 07 Olomouc, Czech Republic
Joint Laboratory of Optics of Palacky University and Institute of Physics AS CR, Institute of Physics of the Czech Academy of Sciences, 17 Listopadu 50a, 772 07 Olomouc, Czech Republic
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