Abstract
Fatigue properties of a transformation-induced plasticity-aided martensitic steel subjected to vacuum carburisation under carbon potentials ranging from 0.70 to 0.80 mass% and subsequent fine-particle peening were investigated for the fabrication of precision transmission gears. The fatigue limits of smooth specimens increased by 34–41% with increasing carbon potential, compared with that of heat-treated and fine-particle peened steel. The notched fatigue limits increased to a lesser degree except in case of carbon potential of 0.70 mass%. The increased smooth fatigue limits were associated with the high Vickers hardness and compressive residual stress via severe plastic deformation and the strain-induced martensitic transformation during fine-particle peening, as well as a 50% reduction of retained austenite fraction during fatigue deformation.
Original language | English |
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Pages (from-to) | 743-750 |
Number of pages | 8 |
Journal | Materials Science and Technology (United Kingdom) |
Volume | 34 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2018 Apr 13 |
Keywords
- Fatigue strength
- TRIP-aided martensitic steel
- Vickers hardness
- carbon potential
- fine-particle peening
- residual stress
- retained austenite
- vacuum carburisation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering