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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047850
EISBN: 978-1-62708-233-4
... Abstract The fan drive support shaft, specified to be made of cold-drawn 1040 to 1045 steel, fractured after 2240 miles of service. It was revealed by visual examination of the shaft that the fracture had initiated near the fillet at an abrupt change in shaft diameter. The cracks originated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047860
EISBN: 978-1-62708-218-1
... Abstract The 1040 steel crankshaft in a reciprocating engine cracked within one year of operation. The journals of the main and crankpin bearings were inspected by the magnetic-particle method. Three to six indications of 1.5 to 9.5 mm long discontinuities were observed in at least four...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0048077
EISBN: 978-1-62708-221-1
... examination. The shaft was identified by chemical analysis to be 1040 steel (hardness 170 HRB) which was concluded to have insufficient fatigue strength. The step at the base of the fillet was revealed as the point of initiation of the fatigue crack. Shaft material was changed to 4140 steel oil-quenched...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046205
EISBN: 978-1-62708-225-9
... Abstract The splined shaft (1040 steel, heat treated to a hardness of 44 to 46 HRC and a tensile strength of approximately 1448 MPa, or 210 ksi) from a front-end loader used in a salt-handling area broke after being in service approximately two weeks while operating at temperatures near -18 deg...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048064
EISBN: 978-1-62708-224-2
... Abstract A 10,890-kg coil hook torch cut from 1040 steel plate failed while lifting a load of 13,600 kg after eight years of service. The normal ironing (wear) marks were exhibited by the inner surface of the hook. It was revealed by visual examination that cracking had originated at the inside...
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Published: 01 June 2019
Fig. 1 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
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Published: 01 June 2019
Fig. 1 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). 4x More
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Published: 01 June 2019
Fig. 1 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
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Published: 01 June 2019
Fig. 1 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 0.4x More
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Published: 01 June 2019
Fig. 1 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
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Published: 01 June 2019
Fig. 1 Fracture surface (a) of failed cadmium-plated 1040 steel nose gear door bolt. The crack propagation pattern (arrow indicates the origin) and topography suggest both fatigue and corrosion. (b) Head of bolt showing cracking (arrow) that would lead to separation in a short time. 3x. (c More
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Published: 01 January 2002
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
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Published: 30 August 2021
Fig. 43 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. Original magnification: ~0.4× More
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Published: 30 August 2021
Fig. 34 Grade 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
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Published: 30 August 2021
Fig. 34 Torch-cut grade 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. Original magnification: 7 More
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Published: 30 August 2021
Fig. 37 Change in section in a grade 1040 steel main hoist shaft where a fatigue crack (arrow) was initiated at rough-machining marks and a break in a fillet More
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Published: 15 January 2021
Fig. 22 Residual stresses in peened 1040 steel samples resulting from tension-tension fatigue (the two symbols represent two samples). Source: Ref 61 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
... (1600 psi). The valve stem was reported to have been solution heat treated at 1040 +/-14 deg C (1900 +/-25 deg F) for 30 min and either air quenched or oil quenched to room temperature. The stem was then reportedly aged at 550 to 595 deg C (1025 to 1100 deg F) for four hours. Investigation (visual...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... Abstract A CrN coated restrike punch was made of WR-95 (similar to H-11), which was fluidized bed nitrided. The coated punch was used on hot Inconel at about 1040 deg C (1900 deg F). However, a water-soluble graphite coolant was used to maintain the punch temperature at 230 deg C (450 deg F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006432
EISBN: 978-1-62708-217-4
... Abstract A failed 25 x 32 mm (1 x 1 in.) cadmium-plated 1040 carbon steel countersunk head type nose gear door securing bolt with a common screwdriver slot was examined. Fracture originated at a thread root and propagated across the cross section. The topography of the fracture was excessively...