First described by E. S. Davenport and Edgar Bain, [2][3] it is one of the products that may form when austenite (the face-centered cubic crystal structure of iron) is cooled past a temperature where it is no longer thermodynamically stable with respect to …

A bainitic structure in steel refers to a two-phase microstructure formed by the transformation of austenite within specific temperature ranges. It is characterized by the presence of aligned carbide particles within laths at a fast cooling rate (lower bainite) and as semi-lamellae between the laths at a slower rate (upper bainite).

Bainite is a plate-like microstructure that forms in steels from austenite when cooling rates are not rapid enough to produce martensite but are still fast enough so that carbon does not have enough time to diffuse to form pearlite. Like pearlite, the constituent phases …

2021年3月1日 · Nanostructured bainitic steels possess ultra-high strength and have been the focus of extensive research due to their suitability in many demanding engineering applications, especially in rail-wheel system, gears, bearings and automobile industry.

2024年5月1日 · The bainitic aging steel achieves exceptional mechanical properties, with an ultimate tensile strength of 2200 MPa, yield strength of 2138 MPa, RT V-north impact energy of 15 J, and fatigue strength of 775 MPa.

2024年5月9日 · The impressive combination of ultimate tensile strength (>2 GPa) and ductility (>15%) has been achieved latterly in medium-carbon bainitic steel, indicating that the ultra-fine bainitic steel has huge potential in the field of wear-resistant components such as gears, bearing, and so on [6,7,8,9].

The essential feature of the upper bainite is that diffusivity of carbon is high enough to cause the partition of carbon between ferrite and austenite, i.e., when bainitic laths grow, the low carbon content (< 0.03%) of the product bainitic ferrite, causes enrichment of carbon in austenite.

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a bainitic microstructure in a PM steel that exhibits a high level of strength and toughness with acceptable ductility. The study focuses on alloy composition and attendant mechanical properties and microstructure. In addition, processing routes to achieve bainitic and mixed

2024年3月15日 · Heterogeneous microstructure has been become a very effective scheme for evading the yield strength (YS)-ductility trade-off in metallic materials, however, strategies of fabricating heterostructured bainite (HeteroB) in carbide-free bainite have not yet been explored.