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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001721
EISBN: 978-1-62708-225-9
... those thought to be problematic. SCC is a delayed failure process in which cracks initiate and propagate at a slow rate (i.e. 10 −6 m/s) 4 until the stresses in the remaining ligament of the material exceed the fracture strength. SCC is a large problem for many manufacturers because it results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090929
EISBN: 978-1-62708-236-5
... the screws. No recommendations were made. Fasteners Installing Screw threads High-strength steel Ductile fracture One lot of size M5 × 0.8 mm, class 8.8 metric screws with a proprietary head design were failing during application. The screws were reportedly failing at the normal installation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001556
EISBN: 978-1-62708-218-1
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0047846
EISBN: 978-1-62708-218-1
... of 760 MPa (110 ksi). Tests showed this strength to be satisfactory for the application. Conclusions Fatigue fracture of the shaft was the result of increased vibration and shock loading after the slip clutch had been eliminated from the drive mechanism. The increased vibration produced stresses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001731
EISBN: 978-1-62708-217-4
... Abstract Service failures have occurred in a number of aircraft parts made of quenched and tempered steel heat treated to ultimate tensile strengths of 260,000 to 280,000 psi. Some of these failures have been attributed to “delayed cracking” as a result of hydrogen embrittlement or to stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001251
EISBN: 978-1-62708-235-8
... Abstract In a steel foundry, tensile and bend specimens of castings made in a 2-ton basic arc furnace showed, at irregular intervals, regions with coarse-grained fractures where the specimens broke prematurely, so that the specified strength and toughness values could not be reached. Several...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
... Abstract Flow forming technology has emerged as a promising, economical metal forming technology due to its ability to provide high strength, high precision, thin walled tubes with excellent surface finish. This paper presents experimental observations of defects developed during flow forming...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
... steel billet, then heat treated to an ultimate tensile strength ( F tu ) of 1520 MPa (220 ksi) in accordance with MIL-H-6875. The machining was then shot peened in accordance with MIL-S-13165 and vacuum cadmium plated in accordance with MIL-C-8837, class 1, type 2. The interference-fit fasteners were...
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Published: 01 June 2019
Fig. 1 Fracturing of high-strength screws. (a) Two grade 8 high-strength steel fasteners that failed on installation. (b) Necking and stretching between adjacent thread crests are evident on a cross section. Unetched. 8.9× More
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Published: 01 June 2019
Fig. 15 Degreasing of the real rupture strength of the thin elements below 3.8 mm of the thickness More
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Published: 01 June 2019
Fig. 11 Fatigue diagram showing the reduction in the fatigue strength of Spring A with poor texture as compared to springs with good texture. Also plotted are the fatigue limits based on the modified Goodman diagram in Fig. 10 . More
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Published: 01 June 2019
Fig. 1 Success of the mission depends greatly on the reliability of high-strength stainless steel fasteners. More
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Published: 01 June 2019
Fig. 3 The distance hardness and approximate tensile strength equivalents that can result from composition and grain size extremes More
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Published: 01 June 2019
Fig. 1 Fracture surface of cast 10-cm (4-in.) high-strength low-alloy steel chain link that failed because of internal hydrogen-assisted cracking. Note hydrogen flake. 0.25× More
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Published: 01 June 2019
Fig. 1 Ultrahigh-strength steel dragline bucket tooth that failed due to environmental hydrogen-assisted cracking. See also Fig. 2 . More
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Published: 01 June 2019
Fig. 1 Ultrahigh-strength steel dragline bucket tooth that failed due to environmental hydrogen-assisted cracking. See also Fig. 2 . More
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Published: 01 December 1992
Fig. 4 Higher-magnification view of the low-bond-strength region. Note the high degree of bead-to-bead bonding compared with the bead-to-substrate bond. 158×. More
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Published: 01 December 1992
Fig. 18 Fatigue strength of unwelded plate (top curve) or plate containing mechanical notches (middle curve) increases with increasing base metal tensile strength, but no significant increase in fatigue strength occurs with increase in base metal strength for fillet-welded structures (lower More
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Published: 01 December 1992
Fig. 21 Degree of fatigue strength improvement possible with various treatment techniques. Source: Ref 3 . More
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Published: 01 December 2019
Fig. 8 Long-life fatigue strength as a function of Rockwell hardness for selected low-alloy steels More