Search Results for quenched-and-tempered steel

Fig. 31 Macrographs of quenched-and-tempered AISI 4142 steel tensile specimens showing splitting parallel to the hot-working axis in specimens tempered at 455 °C (850 °F) or higher Specimen Temper Tensile strength 0.2% yield strength Elongation, % %RA °C °F MPa ksi MPa ksi More

Fig. 466 Impact fracture in a specimen of AMS 6434 steel quenched and then tempered at 205 °C (400 °F) to a yield strength of about 1550 MPa (225 ksi) and broken at −196 °C (−321 °F), showing a woody type of cleavage-fracture surface. TEM p-c replica, 210× More

Fig. 20 Beach marks on (a) quenched-and-tempered alloy steel pin fractured in low-cycle fatigue ( Ref 4 ), and on (b) maraging steel stud fractured in the laboratory by stress-corrosion cracking under steady load ( Ref 16 ). The presence of beach marks is indicative of progressive cracking More

Fig. 16 Mechanical properties of quenched and tempered low-alloy steel (0.30–0.50 wt% C) as determined by Patton. Source: Ref 11 More

Fig. 17 Mechanical properties of quenched and tempered low-alloy steel (0.30–0.45 wt% C) as determined by Janitsky and Baeyertz. Source: Ref 12 More

Fig. 22 Transformation shear bands in quenched and tempered (45 HRC) 1060 steel. (a) 330×. (b) 660× More

Fig. 12 Mud cracks on the fracture surface of a quenched and tempered 4340 steel exposed to a marine environment. TEM replica More

Fig. 11 Debonding of a MnS particle in a 4140 quenched and tempered steel due to a bending stress. The component was forged, and considerable directionality (banding and fibering) existed in the material. Crack propagation from bottom to top in the photograph. Courtesy of Michael West More

Fig. 35 Micrograph of AISI 4140 steel as quenched and tempered. The microstructure is tempered martensite with evidence of decarburization and high-temperature oxidation on the surface of the crack profile. 50×; 2% nital etch. Source: Ref 27 More

Fig. 36 Micrograph of AISI 4140 steel as quenched and tempered. The microstructure is tempered martensite with intergranular quench cracking along the prior austenite grain boundaries. 100×; 2% nital etch. Source: Ref 27 More

Fig. 42 Micrograph of AISI 4140 steel as quenched and tempered. The microstructure is tempered martensite with quench cracking in the area of dimensional change. 91×; 2% nital etch. Source: Ref 27 More

Fig. 43 Micrograph of AISI 4142 steel as quenched and tempered. The microstructure is tempered martensite with quench cracking at the fillet radius. 100×; 3% nital etch. Source: Ref 27 More

Fig. 44 Micrograph of AISI 4140 steel as quenched and tempered. The microstructure is tempered martensite with quench cracking initiating from a machine groove. 100×; 2% nital etch. Source: Ref 27 More

Fig. 45 Micrograph of AISI 4118 carburized steel as quenched and tempered. The microstructure is tempered martensite (unetched) with a quench crack propagating from a machining burr. 200×. Source: Ref 27 More

Fig. 47 Micrograph of type 403 stainless steel as quenched and tempered. The microstructure is predominantly tempered martensite, with cracking promoted by the seam. 100×; Vilella's reagent. Source: Ref 27 More

Fig. 48 Micrograph of AISI 1030 steel as direct-forge quenched and tempered. The microstructure is tempered martensite (unetched) with forged-in scale adjacent to cracking. 100×. Source: Ref 27 More

Fig. 50 Micrograph of AISI 8630 cast steel as quenched and tempered. The microstructure is tempered martensite, pearlite, and ferrite, showing a potential cracking condition. 91×; 3% nital etch. Source: Ref 27 More

Fig. 54 Micrograph of AISI 4340 quenched and tempered steel illustrating a macroetched pure quench crack. Source: Ref 27 More

Fig. 55 Micrograph of AISI 1045 steel as quenched and tempered. Microstructure shows bands with banded tempered martensite and some bainite. The crack profile revealed evidence of tempering oxide and secondary cracking. 200×; 2% nital etch. Source: Ref 27 More

Fig. 56 Micrograph of AISI 1045 steel as quenched and tempered; representative of underheated microstructure adjacent to cracking. 376×; 2% nital etch. Source: Ref 27 More