...Pierre Dupont An examination of a bearing failure due to mismatched and incomplete flame hardening shows the need to work with heat treaters for proper selection and application. The article includes a case study of a large bearing raceway that failed due to incomplete austenitization...

...: (a) Half hard 302 austenitic stainless steel (b) Annealed beryllium-copper alloy 25 (c) 2024T3 aluminum alloy Figure 8 shows impact results for the three materials using 177- m glass microspheres travelling at 11,000 mph. The dark microcraters show incomplete penetration, while those with white centers...

... Region III 600 400 200 Region I 0 Region II 16 18 20 22 24 26 28 30 Time, s Fig. 3 Schematic of the microstructural evolution during flash processing: (a) initial microstructure in Region I, (b) beginning of austenitization in Region II, (c) austenitization with incomplete carbide dissolution at peak...

.... Austenite is an FCC phase that is stable above a temperature of 727°C. Due to incomplete transformation during quenching some austenite is retained at room temperature. Retained austenite can dramatically decrease the mechanical properties of the steel. Properties such as fatigue strength, toughness...

... intragranularly, and the grains Fig. 3 Microstructure of (a) base metal and (b) weld zone. contain a small amount of pearlite (dark spots). In the crystallization process, lath ferrite precipitated along original austenite grain boundary, which is also called primary ferrite. However, side lath-plate ferrite...