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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001444
EISBN: 978-1-62708-231-0
... Abstract To permit bolting of a 90 lb/yd. flat-bottomed rail to a steel structure, rectangular slots 2 in. wide x 1 in. deep were flame-cut in the base of the rail at 2 ft intervals to suit existing bolt holes. During subsequent handling, one of the rails (which were about 25 ft long...
Image
Published: 01 June 2019
Fig. 2 Structure at corner of slot. × 12 More
Image
Published: 01 June 2019
Fig. 13 Pitting of immersion test samples. a) Slot parallel to stud axis (×10). Note the crack-like defect zig-zagging from the notch tip. b) Slot perpendicular to stud axis (×30). Note pitted region and line extending from slot. More
Image
Published: 01 June 2019
Fig. 14 Higher magnification micrograph of linear attack. a) Longitudinal slot (×450). b) Transverse slot (×350). More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0091538
EISBN: 978-1-62708-233-4
... was produced by stress corrosion as the combined result of: residual forming and service stresses; the concentration of tensile stress at outer square corners of the pierced slots; and preferential corrosive attack along the grain boundaries as a result of high humidity and occasional condensation of moisture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046142
EISBN: 978-1-62708-217-4
... (AISI type 410) stainless steel that was through-hardened to 26 to 32 HRC and passivated, was shown to be cracked. The crack initiated at the sharp corner of the elongated milled slot and propagated across to the outer wall. The sections around the crack were spread about 30 deg apart, showing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0048169
EISBN: 978-1-62708-233-4
... and produce torsional vibrations. It was concluded that the two inner tabs had broken in fatigue as the result of cyclic loading that compressed and torsionally vibrated the spring. The fillets were replaced with slots to minimize stress concentration at the corners as a corrective measure. Aerospace...
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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091533
EISBN: 978-1-62708-217-4
... Abstract A clamp used for securing the hot-air ducting system on fighter aircraft fractured in an area adjacent to a slot near the end of the strap after two or three years of service. The strap was 0.8 mm (0.032 in.) thick, and the V-section was 1.3 mm (0.050 in.) thick; both were made of 19-9...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001187
EISBN: 978-1-62708-226-6
... Abstract A stainless tool steel bone drill broke during an operation on a patient and was examined. It showed two fatigue fractures, one of which had started from a sharp-edged, coarsely milled slot (fracture A1), and the other from a point on the outer sheath surface which was not subjected...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001156
EISBN: 978-1-62708-218-1
... Abstract The piston rod of a steering damper on a single decker bus fractured after 100,000 miles of service in the fully-extended left full-lock position. The steering damper, which is similar in shape and operation to a telescopic shock absorber, was secured by ball joints locked with slotted...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001703
EISBN: 978-1-62708-227-3
... of simple tests were carried out to assess the ease with which cracking might be induced in the stud material under sustained load in a chloride environment. Two approximately 6 mm thick slices were sawn from the broken stud. A slot was then cut into each piece from the edge, one parallel, and the other...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
... of the arms being slotted to receive the longitudinal bars. The latter, also of mild steel, were of rectangular section 11 in. × 2 1 2 in., anchored in the slots by fillet welding. Rings of light section were welded to the ends of the bars, which projected a short distance beyond the point...
Image
Published: 01 December 1992
Fig. 5 Part 3, showing mechanical damage and blackened areas caused by corrosion. The sample also contains machined ultrasonic test slots. ∼0.08×. More
Image
Published: 15 May 2022
Fig. 16 Adequate length in the snap lock reduces stresses. Full radii at the base of the slots eliminate stress concentrations. Clearance was provided between the snap lock and mating part, enabling the molder to easily remove steel in the mold for a tighter fit, if required. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
....” 1 However, not all categorization jobs can be legitimately simplified to this degree. Some categorization jobs, and most determinations of damage mechanisms, require a very extensive list of possible “slots,” including slots for unknown/unanticipated observations. In this case, two additional slots...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046422
EISBN: 978-1-62708-234-1
..., which is converted into heat. The heat is carried away by a continuous through-flow of water superimposed on the recirculating flow. The water enters the working compartment through some of the holes that are visible in the stator vanes and exits through a circumferential slot between the rotor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... ). The bell was constructed and manufactured as a thin-wall, cylindrical part, with a thicker central area in the middle of the bell ( Fig. 3 ). A slot surrounded approximately half of this thickened portion of the bell. Separation of the center portion of the bell occurred when a crack propagated across...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
... fractographs of surfaces A and B, respectively, showing brittle intergranular fractures. 5000× Investigation Inspection of the bolts and nuts showed excessive burrs in the threads at the cotter-pin holes and the nut slots, which made it necessary to use a wrench in assembly. This obviously had set up...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089534
EISBN: 978-1-62708-223-5
... of the hardenability of the core and assuming that the tapered slot in the block had a hardened surface, the low tempering temperature used may have contributed to the brittleness. Conclusions Failure of the jaws was primarily attributed to the presence of internal microshrinkage, although the brittleness...