Single-point scratch testing for understanding particle engagement in abrasion of multiphase materials
| Autor: | Jozef Vleugels, Jacob Sukumaran, Naveenkumar Rajendhran, Shuigen Huang, Patrick De Baets |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science NBC Materials Science Materials Science Multidisciplinary Curvature Abrasion (geology) Engineering Materials Chemistry Multiphase materials Composite material computer.programming_language Multi-asperity abrasion Science & Technology Single point scratch test INDENTATION Abrasive CERMETS Surfaces and Interfaces Radius Condensed Matter Physics Strength of materials FRACTURE Surfaces Coatings and Films Engineering Mechanical WEAR Mechanics of Materials Scratch Fracture (geology) Particle Superimposition MICROSTRUCTURE computer |
| Popis: | The current research explores the influence of multi-asperity abrasive particles engagement on multiphase materials. WC-Co (WC-15.6% Co) and NbC-cermet (NbC-12% Ni–10% Mo2C) hard materials were tested using a scale down single point scratch tester. Multi-asperity scratch patterns were produced by implying multiple scratches on hardmetal surface by parallel and repeated sliding. Superimposition of interactions has been implemented to study the damage evaluation of close-up parallel scratches. The abrasive particle characteristics such as size and apex angle were replicated by the diamond indenter and their influence with different applied loads [1–20 N] and sliding speeds [0.2–5 mm/s] were studied. NbC-cermet and WC-Co show a decrease in friction coefficient by 20–46% and 11–30% respectively, while the indenter tip radius changes from 200 μm to 25 μm under the same operating conditions. The wear micro-mechanism mainly changes from plastic deformation to fracture when the load and tip radius is increased. An extensive comparative study shows NbC-cermet prematurely experiences fracture dominated failure than its reference WC-Co. Moreover, tip size defect from indenter curvature geometry greatly affects the mean apex angle. |
| Databáze: | OpenAIRE |
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