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insufficient fillet radius

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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
... to finger-tightness, and the consequent wrench torquing caused the actual fractures. The very small radius of the fillet between the bolt head and the shank undoubtedly accentuated the embrittling effect of the hydrogen. To prevent reoccurrence, the cleaning and cadmium-plating procedures were...
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 and...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001847
EISBN: 978-1-62708-241-9
... underneath. This led to further wear and an increase in friction between the sleeve and bearing bush. Fatigue crack initiation occurred at the root fillet because of stress concentration and large frictional forces. Insufficient nitriding depth facilitated the propagation of fatigue cracks. bearing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047558
EISBN: 978-1-62708-236-5
... plate of the exciter should be braced to reduce the amount of transmitted vibration. Also, the fillet in the exciter shaft should be carefully machined to provide an adequate radius. Electric generators Fillet welds Stress concentration Vibration Weld deposited coatings 4130 UNS G41300...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... steel insufficient fillet radius fractography hardness 4340 (low-alloy steel) UNS G43400 References 1. Shigley J.E. , Mischke C.R. , Budynas R.G. : Mechanical Engineering Design , 7th edn. , p. 80 . McGraw-Hill , New York ( 2004 ) 2. Heat Treater’s...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047140
EISBN: 978-1-62708-234-1
... superficial working of the metal, probably insufficient hot working, produced a microstructure in which the carbide particles were not broken up and evenly distributed. As a result, the grains were totally surrounded with brittle carbide particles. This facilitated the formation of a crack at a fillet in the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001466
EISBN: 978-1-62708-221-1
... arising from misalignment were responsible for the fatigue failure, which occurred in a region of stress concentration where insignificant fillet radius had been provided. Bend properties Gear boxes Hoists Stress concentration Alloy steel Fatigue fracture This shaft, which carried both the...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... Abstract This article aims to identify and illustrate the types of overload failures, which are categorized as failures due to insufficient material strength and underdesign, failures due to stress concentration and material defects, and failures due to material alteration. It describes the...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001764
EISBN: 978-1-62708-241-9
... fillet radius AISI 5046 (chromium alloy steel) UNS G50460 References 1. Fractography and Atlas of Fractographs , vol. 9 , Metals Handbook , 8th ed. , American Society for Metals , Metals Park, OH , 1974 , pp. 322 – 23 . 2. Shigley J.E. : Theory of...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... or shallow) Unbalanced heat input To prevent cracking in multiple-pass groove or fillet welds: Increase bead size of the first pass by using lower travel speed, a short arc, and an uphill (∼5°) welding mode. Change weld profile to flat or convex. Control interpass temperature and...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... flash or fins A 112 Projections in the form of veins on the casting surface Veining or finning A 113 Network of projections on the surface of die castings Heat-checked die A 114 (a) Thin projection parallel to a casting surface, in re-entrant angles Fillet scab A 115 Thin...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... ). A change in section in a uniformly loaded shaft that produces a severe stress concentration will lead to a pattern of beach marks such as that shown in Fig. 2(g) , (h), or (j). An example of a severe stress concentration is a small-radius fillet at the junction of a shoulder and a smaller-diameter...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001811
EISBN: 978-1-62708-180-1
... sections are often points of initiation of cracks. Small fillets, sharp corners, grooves, and threads act as stress raisers from which fatigue cracks initiate and fractures propagate. Correct design of a threaded shank on a hook, for example, and the stress-relief groove at the base of a threaded shank are...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... avoided because many systems are very sensitive to such vibrations. The buckets analyzed had fractured through the shroud section on the pressure side of the airfoil, along a path generally parallel to the airfoil surface at the edge of the airfoil/shroud fillet radius ( Fig. 2 ). The fracture then...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001723
EISBN: 978-1-62708-221-1
... successfully at 39 ft. 6 in. radius (rated capacity 15 tons) and slewed through 300°. The test load of 5 tons at the end of the jib (rated capacity 4 tons) had also been lifted and was in process of being slewed at the time of this failure. It is understood that, in order to avoid an obstruction on the ground...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... ), there is insufficient information to tell what the test conditions were, and the data are virtually useless. In many cases, insufficient information is available for the effective use of S - N data. Many necessary pieces of data are simply missing. A partial list of important questions might be...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... stress raisers and unfavorable shear planes. Source: Ref 4 The shape and size of the head-to-shank fillet also have an important influence on fatigue performance. In general, the radius of this fillet should be as large as possible while at the same time permitting adequate head-bearing area...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
...-load ratings are based on results of laboratory rolling-contact fatigue tests that have been conducted under conditions as near ideal as possible. Any departure from these reasonably ideal conditions, such as misalignment, vibration, shock loading, insufficient or inefficient lubrication, extremes of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... fatigue is the sensitivity to even small geometric and metallurgical imperfections and cracks, which may accumulate into a critical situation. Another specific and crucial problem in fatigue design is the often insufficient information about the exact loading situation of a structure, for example, the...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... the upper central portion of the ingot ( Fig. 1 ) during solidification and contraction of the metal, when there may eventually be insufficient liquid metal to feed the last remaining portions as they contract. A concave cavity thus forms at the top of the ingot because of metal shrinkage during...