LUO, Quanshun, MEI, Haijuan, KITCHEN, Matthew, GAO, Yubi and BOWEN, Leon (2021). Effect of short-term low-temperature austempering on the microstructure and abrasive wear of medium-carbon low-alloy steel. Metals and Materials International.
Documents
27846:584016
PDF
Luo_EffectShort-Term(VoR).pdf - Published Version
Available under License Creative Commons Attribution.
Luo_EffectShort-Term(VoR).pdf - Published Version
Available under License Creative Commons Attribution.
Download (5MB) | Preview
Abstract
Nano-bainitic steels have attracted great attention for good wear resistance. In this research, a medium-carbon low-alloyed steel was austempered at a low temperature close to its martensite-start temperature for various times to obtain mixed microstructure of nano-bainite, martensite and retained austenite. The austempered samples were characterised comprehensively by field-emission SEM and quantitative XRD. Its two-body abrasive wear property was evaluated by sliding on a SiC abrasive disc. The results revealed the formation of initial nano-width carbide-free bainitic ferrite (BF) after austempering by 10 minutes, whereas the BF size and amount both increased with the austempering time. The austempered samples exhibited wear coefficients lower than the quenched martensitic sample by up to 50%. SEM and TEM observations showed wear mechanisms of micro-cutting and ploughing deformation, including the formation of a nano-laminate top layer and bending deformation in the subsurface multiphase microstructure. The decreased wear loss was attributed to the role of retained austenite in the increased plasticity.
More Information
Statistics
Downloads
Downloads per month over past year
Metrics
Altmetric Badge
Dimensions Badge
Share
Actions (login required)
![]() |
View Item |