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fatigue failure

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001656
EISBN: 978-1-62708-219-8
... and depassivation by chloride ions. The first portion of this paper presents information, using metallographic techniques, on the depassivation of reinforcing steel in the presence of Cl − ions. Although there are no reports of failures in primary elements of structural concrete members due to fatigue...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048361
EISBN: 978-1-62708-234-1
.... The transgranular cracks suggested that thermal fatigue was a more likely cause of failure than SCC. It was concluded by temperature measurements that circumferential temperature gradients, in combination with inadequate flexibility in the piping system as a whole, had caused the failures. The tee fitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047414
EISBN: 978-1-62708-233-4
...). This fatigue failure was the result of poor design, which incorporated a notch that acted as a stress raiser, leading to fatigue-crack growth. A generous radius was recommended to avoid similar failures. Radii Stress concentration Steel casting Fatigue fracture Figure 1 shows a fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0048350
EISBN: 978-1-62708-227-3
... surfaces by electron microscopy at high magnification. Fatigue failures were concluded to be caused by vibrations resulting from normal steam flow at high steam demand. Too rigid support near the steam drum resulted in concentration of vibratory strain in the regions of failure. The method of supporting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0047917
EISBN: 978-1-62708-227-3
... that the failure was caused by fatigue initiated in corrosion pits (caused by seawater). The fracture was found to be transgranular. It was recommended that the inner and outer rings should both be made from the more corrosion resistant 17-4 PH (AISI type 630) stainless steel. Cyclic load Hydrofoils Stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001417
EISBN: 978-1-62708-227-3
... of fatigue failure were present with origins at about the mid-thickness of the pin located each side of the step in the fracture surface. In addition, cracking was evident in the axial direction. The crack ran into one of the radial oil holes near the end of the pin. A further section was taken transverse...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048261
EISBN: 978-1-62708-225-9
...-angle intersections of the mounting holes and tooth-root fillets was revealed by metallographic examination. Design of the gear and placement of the mounting holes, which resulted in through hardening, were concluded to be the contributing factors to the fatigue failure of the gear. Design Gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0051292
EISBN: 978-1-62708-225-9
... marks and fatigue striations (beach marks), which are not always expected in the fracture surface of spring fatigue failures, as noted above. Clear evidence of pitting corrosion at the fatigue fracture origin can also be seen. However, the portions of spring showed no evidence of red rust and had...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048273
EISBN: 978-1-62708-225-9
... at the roots and to break off. Selected Reference Selected Reference • Fatigue Failures , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 700 – 727 10.31399/asm.hb.v11.a0003544 ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0047968
EISBN: 978-1-62708-225-9
... life to an acceptable level. Selected Reference Selected Reference • Ahmed R. , Rolling Contact Fatigue , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 941 – 956 10.31399/asm.hb.v11.a0003563 ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001463
EISBN: 978-1-62708-224-2
... failure was due to fatigue. Macro-etched cross sections showed a lack of penetration and fusion in the weld. Fatigue cracks developed and slowly progressed through the weld metal. Fracture occurred when the remaining area of sound metal was insufficient to support the load. Lack of penetration...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048020
EISBN: 978-1-62708-224-2
.... Conclusions Failure of the wire rope occurred by bending fatigue. Continually running the same section of the rope over a sheave too small in diameter resulted in excessive bending stresses. Corrective Measures The sheave diameter could not be increased; therefore, the flexibility of a 6 × 37 rope...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0048026
EISBN: 978-1-62708-224-2
... that the sudden shock received by the hook in rolling the coils over the edge of the rinse tank after pickling caused vibration which was most severe at the clamped end of the rope. It was concluded that this caused the fatigue failure of the rope. As a corrective measure, the diam of the sheave was increased...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001427
EISBN: 978-1-62708-236-5
... flexing that the apparent between it and the crankcase. These factors would increase the magnitude of the fluctuating stresses to which the shaft was subjected and be conducive to fatigue failure. There were three other compressors of the same make and type at the particular location...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001722
EISBN: 978-1-62708-236-5
... Stress concentration Heat-treated steels Fatigue fracture On page 165 of Volume II of this series of Reports a case was reported of the failure by fatigue cracking of two chromium-plated Diesel-engine crankshafts. Another case of failure from a similar cause has since been investigated. The part...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001415
EISBN: 978-1-62708-236-5
.... , Trans. Inst. Mar. Eng. , v.LX. No. 12 , 1948 . Selected References Selected References • Wulpi D.J. , Failures of Shafts , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986 , p 459 – 482 10.31399/asm.hb.v11.a0001808 • Fatigue Failures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001416
EISBN: 978-1-62708-235-8
... with the cylinder. Castings Hydraulic presses Stress concentration Fe-0.35C Fatigue fracture The hydraulic cylinders on three identical presses failed in a similar manner after approximately ten years' service life. On the occasion of the first failure, no detailed examination was made...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0048728
EISBN: 978-1-62708-228-0
... wishes to acknowledge G.M. Buchheim, Exxon Research & Engineering Company, for his assistance in preparing several of the examples in the source article. Selected Reference Selected Reference • Fatigue Failures , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c0048114
EISBN: 978-1-62708-231-0
... of resultant tensile stress from torsional stressing of the spring material. It was concluded that the fatigue failure in the spring was initiated at the base of a seam. Tensile stress Torsion 5160 UNS G51600 Fatigue fracture Hot-rolled hardened-and-tempered 5160 bars for suspension springs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001418
EISBN: 978-1-62708-231-0
... the bearing material. The defect was stoned smooth, a new bearing fitted, and the engine returned to service. The engine performed satisfactorily for a further twelve months until fracture of the crankshaft through the No. 5 crank pin supervened. The fracture revealed a complex torsional fatigue failure...