6533b837fe1ef96bd12a28ff
RESEARCH PRODUCT
Positron Studies of Subsurface Zone in Titanium Created in Sliding Wear
Jerzy DryzekMirosław Wróbelsubject
geographyMaterials sciencePlateaugeography.geographical_feature_categoryMechanical EngineeringMetallurgychemistry.chemical_elementSurfaces and InterfacesIndentation hardnessSurfaces Coatings and FilmsMetalPositronchemistryMechanics of MaterialsVacancy defectvisual_artvisual_art.visual_art_mediumExponential decayComposite materialLayer (electronics)Titaniumdescription
Positron annihilation studies of the subsurface zone constituted during dry sliding in pure titanium are reported. A new type of defect depth profile in this zone, which is not an exponential decay usually reported for other metals and alloys, is observed. Two layers in the subsurface zone are present in this metal. In the layer adjacent to the worn surface, the characteristic plateau of the mean positron lifetime that extends to a depth of 60–70 μm was observed. Small vacancy clusters and dislocations were recognized in this layer. At deeper zone, the mean positron lifetime decreased exponentially in the manner typical for the other metals. In this zone, vacancy clusters increase in size and decreases in concentration with increasing depth. There is a slight increase in measured microhardness in the subsurface zone in relation to the interior.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-07-15 | Tribology Letters |