Fig. 6 One histogram of data for Zr(Y)O 1.862 at 1040 K and 7.8 V dc across the crystal. (a) The Laue pattern for all 112 time channels (λ = 0.70 to 3.60 Å). (b) Time resolution of the hhh reflections at y = 63. TOF, time-of-flight. Source: Ref 14 More

Fig. 34 Composition profiles of an Fe-Cr-Co alloy. Aged at 560 °C (1040 °F). See also Fig. 33 . Source: Ref 11 More

Fig. 93 Example of quench cracks on the head of AISI 1040 steel bolts. Cracks were caused by incomplete development of the case. (a) Bolt heads at 0.72×; cracks accentuated using magnetic particles. (b) Quench crack near a corner. Etched with 2% nital. 54×. (c) Opened quench crack with arrows More

Fig. 96 Broken 25-mm (1-in.) diam AISI 1040 steel bolt. (a) Macrograph of fracture surface; corrosion products obscure most of the surface. 2×. Intergranular secondary cracks (b) were observed in the region near the surface of the bolt shown by the arrow in (a). The bolt was not tempered More

Fig. 13 Cleavage fracture in a notched impact specimen of hot-rolled 1040 steel broken at −196 °C (−320 °F), shown at three magnifications. The specimen was tilted at an angle of 40 ° to the electron beam. The cleavage planes followed by the crack show various alignments, as influenced More

Fig. 193 Surface of a fatigue fracture in a shaft of AISI 1040 steel with a hardness of approximately 30 HRC. The shaft was fractured when subjected to rotating bending. The oval shape of the central region of final fast fracture indicates that two mutually perpendicular, unequal bending More

Fig. 194 Fatigue-fracture surface of a keyed shaft of AISI 1040 steel (∼30 HRC). The fatigue crack originated at the left bottom corner of the keyway and extended almost through the entire cross section before final fast rupture occurred. Beach marks are visible; these swing counterclockwise More

Fig. 24 1040 steel fan shaft that fractured in reversed-bending fatigue. (a) Overall view of shaft. Dimensions given in inches. (b) Fracture surface showing diametrically opposed origins (arrows) More

Fig. 26 Forged 1040 steel main-bearing journal that failed in fatigue. Top: Section showing cracks originating at coarse sulfide inclusions. Dimensions given in inches. Bottom: Macrograph of a 5%-nital-etched section showing the segregated inclusions (dark areas). 4× More

Fig. 14 Torch-cut 1040 steel coil hook that failed by fatigue. (a) Fracture region of the 10,890-kg (12-ton) hook. (b) Macrograph of a nital-etched section showing cracks propagating from the surface (top), which was hardened and embrittled during torch cutting. 7 1 2 ×. (c More

Fig. 16 Change in section in a 1040 steel main hoist shaft where a fatigue crack (arrow) was initiated at rough-machining marks and a break in a fillet. More

Fig. 22 Residual stresses in peened 1040 steel samples resulting from tension-tension fatigue (the two symbols represent two samples). Source: Ref 51 More

Fig. 38 AISI 1040 steel shaft for an amusement ride. Fatigue fracture originated at weld undercuts. Two sets of beach marks and a triangular final-fracture zone are visible. Approximately 0.4× More

Fig. 33 AISI 1040 steel bar austenitized at 913 °C (1675 °F) for 30 min, then cooled slowly in a furnace. White areas are ferrite; dark areas are pearlite. Mixed grain size due to heating into the coarsening range is also observed. Source: Ref 4 More

Fig. 20 Influence of grain aspect ratio on stress for 100-h life for MA 753 at 1040 °C (1900 °F). Source: Ref 13 More

Fig. 42 AISI 1040 steel bar austenitized at 913 °C (1675 °F) for 30 min and cooled slowly in a furnace. White areas are ferrite; dark areas are pearlite. Mixed grain size due to heating in the coarsening temperature range is also observed. 200×. Nital etch. Source: Ref 12 More

Fig. 15 Fatigue characteristics of normalized and tempered cast and wrought 1040 steels. Notched and unnotched specimens were tested in R.R. Moore rotating-beam tests More

Fig. 9 Fatigue data for 1040 and 4037 steel bolts. The bolts ( 3 8 by 2 in., 16 threads to the inch) had a hardness of 35 HRC. Tensile properties of the 1040 steel at three-thread exposure were yield strength, 1060 MPa (154 ksi); tensile strength (axial), 1200 MPa (175 ksi); tensile More

Fig. 1 Fully annealed 1040 steel showing a ferrite-pearlite microstructure. Etched in 4% picral plus 2% nital. Original magnification: 500× More

Fig. 4 Spheroidized microstructure of 1040 steel after 21 h at 700 °C (1290 °F). 4% picral etch. Original magnification: 1000× More