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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047181
EISBN: 978-1-62708-233-4
... incidence of quench cracks that rendered the parts useless. Recommendations included changing the specification, requiring the steel to have lower sulfur concentrations. Magnetic-particle cleanliness standards should be imposed that will exclude material with harmful clusters of sulfide stringers...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... by fatigue. The springs contained drawing defects that served as the fatigue crack initiation sites. It was recommended that the wire drawing process be investigated for various levels of steel cleanliness to predict the incidence of drawing defects at the wire surface. Stress analysis to determine...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... It was recommended that the prosthetic manufacturer investigate all thermal cycles to which the part was exposed. Specifically, this evaluation should include a review of vacuum levels during solution annealing, part cleanliness, inert gas purity, and the presence of cooling water or air leaks during hot isostatic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001559
EISBN: 978-1-62708-229-7
... and Cleanliness Requirements for Nuclear Components, RDT F 5-1T, Department of Energy, 1972 . Selected Reference Selected Reference • Warke W. R. , Stress-Corrosion Cracking , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 , p 823 – 860 10.31399...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
..., this was the cause of the vast majority of bearing failures. Significant improvements in steel cleanliness have been made since the 1960s, which has led to a dramatic increase in RCF life; thus, this failure mode is now rare, as shown in Fig. 1 ( Ref 2 , 3 ). More recently, surface-initiated fatigue—caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048413
EISBN: 978-1-62708-226-6
... The microstructure of the plate had a high degree of cleanliness ( Fig. 1d ). The deformation structure showed that the material was in the cold-worked condition, which was confirmed by Vickers hardness tests. Energy-dispersive x-ray analysis indicated a chemical composition corresponding to a type 316 stainless...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001361
EISBN: 978-1-62708-215-0
.... The fractograph has been rotated 92.5° relative to (a). 9400×. (c) SEM fractograph of a typical field on the fracture surface. The fractograph was overexposed to highlight the secondary cracks/inclusions network. 1128× Metallography The body was evaluated for material cleanliness. The size and frequency...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
... concentration, solution cleanliness, temperature control, and voltage/amperage control. ...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001072
EISBN: 978-1-62708-214-3
.... “A” is enlarged in Fig. 8 . Unetched. 43×. Fig. 8 Higher-magnification view of “A” in Fig. 7 . Area “B” crack deposit contained potentially corrosive sulfur. Area “C” crack contained both sulfur and chlorine. Unetched. 405×. The material was of acceptable cleanliness with respect to nomnetallic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c9001622
EISBN: 978-1-62708-222-8
... small amounts of residue can be seen as adherent deposits, and direct comparison can be conducted between nondiscolored and discolored areas with regard to apparent cleanliness and surface roughness. Energy-dispersive spectroscopy is useful for determining relative percentages of the elements above...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001299
EISBN: 978-1-62708-215-0
... Fractographic studies established the mode of bending and torsional stresses. Its origin was traced to a subsurface hard refractory (Al 2 O 3 ) type of inclusion. The subsurface defect acted as a severe notch for the initiation of fatigue cracking under dynamically loaded conditions. The overall cleanliness...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001102
EISBN: 978-1-62708-214-3
... cleanliness and contained one-dimensional, thin series oxides, with a few scattered fine sulfides. Etching revealed a tempered martensitic microstructure typical of a quenched and tempered material. Figure 10 shows a typical secondary crack network. Crack propagation was primarily intergranular. Fig...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001503
EISBN: 978-1-62708-234-1
... martensite throughout, and no retained austenite. And the surface structure showed no evidence of frictional distress; it had been cleanly cut by abrasion. The contact pattern on the concave (forward) sides shows no wear at the heel end, but the wear increases uniformly to a deeply worn area near the toe...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001378
EISBN: 978-1-62708-215-0
... of the stud bolts approximately every 6 months. Develop a cleanliness specification to avoid the presence of excessive MnS stringers and consider the use of an alloy steel. Ensure that the slings are not too short, especially when moving dies with a relatively wide spacing of the stud bolts. Do...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001442
EISBN: 978-1-62708-221-1
... of the phenomenon known as “lamellar tearing”. Fig. 4 Detached vane with portion of back plate showing lamellar tearing. As this effect is related to the internal cleanliness of the steel, a sulphur print was taken on the cross section through a typical zone to disclose that the sulphide inclusions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001603
EISBN: 978-1-62708-228-0
... of inclusions in the vicinity of the crack (fusion zone) and away from the crack (PM) was determined to be 0.15 and 0.14, respectively. This implies that the cleanliness level of the fusion zone is not a critical factor contributing to crack formation. The pearlite volume fraction was measured for cracked...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001579
EISBN: 978-1-62708-226-6
..., was sufficient to make the activity associated with assisted perambulation drive the fatigue process. The situation became progressively worse as the crack propagated, and a complete fracture of the implant required a very short period of time. This analysis illustrates the importance of steel cleanliness...
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
... specimens were taken through the cross section of the fracture origin on “S,” “N,” and “V8.” The cleanliness of the material was relatively good for the required alloy, despite the presence of a few inclusions, but “N” showed many precipitates and bands due to microalloy segregation ( Fig. 5 , 6...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006755
EISBN: 978-1-62708-295-2
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
... by magnetic particle, ultrasonic, and x-ray methods to determine if the steel was below normal in cleanliness. No significant defects were found. Hydrogen determinations were also made and no unusually high values were obtained. Although the mechanism of the crack initiation could not definitely...