Search Results for bainite

Fig. 15 Bainite morphologies. (a) Upper bainite. (b) Lower bainite More

Fig. 17 Microstructure of (a) upper bainite and (b) lower bainite in a Cr-Mo-V rotor steel. 2% nital + 4% picral etch. Original magnification: 500×. (c) S5 tool steel austenitized, isothermally transformed (partially) at 540 °C (1000 °F) for 8 h, and water quenched to form upper bainite (dark More

Fig. 15 Lower bainite. (a) Light micrograph illustrating sheaves of lower bainite in a partially transformed (668 K) Fe-0.3C-4Cr wt% alloy. The light matrix phase is martensite. (b) Corresponding transmission electron micrograph illustrating subunits of lower bainite. Source: Ref 2 More

Fig. 36 Appearance of upper bainite (a and b) and lower bainite (c) in eutectoid steel (0.8% C) at original magnification 250× (left) and 2000× (right). (a) The structure is pearlite with some upper bainite after isothermal exposure at 500 °C (930 °F) for 0.5 s. (b) Upper bainite is dominant More

Fig. 21 Microstructure of (a) upper bainite and (b) lower bainite in a Cr-Mo-V rotor steel. 2% nital + 4% picral etch. 500× More

Fig. 22 TEM micrographs of (a) upper bainite and (b) lower bainite in a Cr-Mo-V rotor steel More

Fig. 22 Microstructure of (a) upper bainite and (b) lower bainite in a Cr-Mo-V rotor steel. 2% nital + 4% picral etch. 500× More

Fig. 23 TEM micrographs of (a) upper bainite and (b) lower bainite in a Cr-Mo-V rotor steel More

Fig. 8 Transformation-expansion comparison of martensite and bainite at various carbon contents. This applies to the commercial austempering range of 260 to 399 °C (500 to 750 °F). Source: Ref 4 More

Fig. 18 Light micrograph showing patches of (a) upper bainite formed in 4150 steel partially transformed at 460 °C (860 °F) and (b) lower bainite (dark plates) in 4150 steel (nital etch). Courtesy of F.A. Jacobs ( Ref 25 ) More

Fig. 5 Light micrograph showing patches of upper bainite (dark) formed in 4150 steel partially transformed at 460 °C (860 °F). Courtesy of F.A. Jacobs More

Fig. 6 Light micrograph showing lower bainite (dark plates or needles) formed in 4150 steel. Courtesy of F.A. Jacobs. More

Fig. 3 An illustration of the growth of bainite and the development of upper or lower bainite morphologies. Source: Ref 5 More

Fig. 6 Transmission electron micrograph of a sheaf of upper bainite in a partially transformed Fe-0.43C-2Si-3Mn wt% alloy. Source: Ref 2 More

Fig. 9 Surface reliefs due to bainite (B) and martensite (M) formation. Note the abrupt halt in growth of both martensite and bainite upon impingement of growth interface and parent γ phase boundary. Source: Ref 12 More

Fig. 16 Lower bainite in a 4360 steel specimen, austenitized, isothermally transformed at 300 °C (570 °F), and quenched. The matrix is untempered martensite. Picral etch. 500×. Source: Ref 14 More

Fig. 17 Lower bainite formed at 345 °C (650 °F) in 4360 steel. 8000×. Source: Ref 16 More

Fig. 18 Transmission electron micrograph of lower bainite showing the precipitation of several variants of carbide particles within the plate of bainitic ferrite. Source: Ref 13 More

Fig. 21 Replica electron micrograph of mixed microstructure (granular bainite, austenite, and martensite), with the parent austenite boundaries delineated by irregularly shaped particles. Source: Ref 31 More