Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10156031 | Materials Letters | 2019 | 7 Pages |
Abstract
This work reasonably utilizes the decreasing of martensite start (Ms) temperature caused by prior cold deformation, combining martensite pre-quenching and bainite transformation to develop ultrafine martensite-bainite duplex microstructures for improves toughness of GCr15 bearing steel. Comparison with the conventional quenched and tempered (QT) specimen, the remarkable improvement of impact toughness (â¼87â¯J) and fracture toughness (â¼39â¯MPa·m1/2) were achieved in 30% prior cold deformed specimen, while with a slight decrease in the hardness. The enhanced toughness was attributed to the nanometric martensite-bainite duplex microstructures and the formation of film-like retained austenite.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Xiaohui Lu, Dongsheng Qian, Wei Li, Xuejun Jin,