1-20 of 83 Search Results for

marking permanency tests

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001766
EISBN: 978-1-62708-241-9
... Electron Microscopy (SEM) indicates that the apparent pre-crack exhibits several crack arrest markings, suggesting progressive sub-critical crack growth, as shown in Fig. 4 . Of additional note in the crack initiation region are distinct secondary cracks contained within the boundary of the first crack...
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
... nondestructive testing techniques are applicable, what level of metallurgical testing should be performed, and, finally, what quality-assurance documentation is needed. A teamwork approach between the designer and foundry (and, where possible, the ultimate user) is the best (and lowest-cost) method of avoiding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001496
EISBN: 978-1-62708-231-0
... Markings Physical Appearance of Pinion Physical Appearance of Gear Magnetic-Particle Inspection Nital Etching A decision must now be made as to which, if any, of the metallurgical tests are to be made. Although the cause of failure may be apparent at this time, some doubt would remain...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
..., while surface initiation is expected for higher-stress levels 1 and 2. Source: Ref 10 Fig. 4 Subsurface fatigue origins (at arrows) in an induction-hardened 8.25 cm (3.25 in.) high-manganese medium-carbon steel axle laboratory tested in rotating bending. Note absence of beach marks. Source...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0046155
EISBN: 978-1-62708-233-4
...Abstract Abstract A structure had been undergoing fatigue testing for several months when a post-like member heat treated to a tensile strength of 1517 to 1655 MPa (220 to 240 ksi) ruptured. The fracture occurred in the fillet of the post that contacted the edge of a carry-through box bolted...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
.... Courtesy of D. Edwards Fig. 31 Fracture surface of notched tension test of alloy steel tested at 0 °C (32 °F). Fibrous overload fracture surface exhibits fine circumferential ridges. Similar markings have been erroneously identified as fatigue beach marks. Source: Ref 16 Fig. 34...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001569
EISBN: 978-1-62708-229-7
... in selecting the type(s) of nondestructive and destructive testing for detecting and monitoring damage. Fatigue is a time-dependent failure mode which may be promoted by primary as well as secondary stresses. Primary stresses (pressure and weight) are usually quantified for design while the effects...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001127
EISBN: 978-1-62708-214-3
... there may be permanent deformation in other locations, where relatively ductile fracture is seen. The surface of brittle fracture is perpendicular to the principal tensile stress (applied by the float ball against the rod in this instance). Characteristic fanlike markings on the fracture surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006811
EISBN: 978-1-62708-329-4
... acid etch Fig. 13 Scanning electron microscopy micrographs of two different surgical devices showing (a) elongated microvoid coalescence morphology indicative of ductile tearing and (b) river patterns indicative of brittle fracture. The direction of crack propagation is marked by an orange...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0090463
EISBN: 978-1-62708-234-1
... stabilizer. In addition to the PC housing, the design of the switch included an external protective zinc component installed with a snap-fit and two retained copper press-fit contact inserts. Control parts representing an earlier production lot were available for reference purposes. Tests and Results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0090454
EISBN: 978-1-62708-220-4
... while in service. The failure occurred as cracking through the vessel wall, resulting in leakage of the fluid. The tank had been molded from a high-density polyethylene (HDPE) resin. The material held within the vessel was an aromatic hydrocarbon-based solvent. Tests and Results Conclusions...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... of a steel wire-rope wire that failed in tension because of overloading. Necking at the end of the wire indicates ductile fracture. Thickness/diameter changes, keyways, lubrication holes, rough-machining marks, and threaded sections often act as points of crack initiation. Small fillets, sharp corners...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
.... In such a case, macroscopic evidence indicating the nature and type of fatigue loading (beach marks, ratchet marks, etc.) may provide useful evidence to the analyst. The ultimate purpose of fractography and the other methods of failure analysis is the determination of the (technical) root cause of failure...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... A). (b) Machined grooves and punch marks (arrow B) on surface of crankpin. (c) Groove in crankpin, where cracking was initiated Fig. 40 Stub-shaft assembly, for agitator in a polyvinyl chloride reactor, that failed by ductile fracture. Top left: Configuration and dimensions (given in inches...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
.... Am. Soc. Test. Mat. , Vol. 39 , 1939 , pp. 723 – 737 . 14. Moore H. F. , Iron Age , September 10th , 1931 , p. 674 . 15. Lazan B. J. , “A Study with New Equipment of the Effects of Fatigue Stress on the Damping Capacity and Elasticity of Mild Steel,” Trans. A.S.M...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
...-shrinkage, shrinkage porosity, leaders Discontinuities C 100 Discontinuities, generally at intersections, caused by mechanical effects (rupture) C 100 Normal cracking C 111 (a) Normal fracture appearance, sometimes with adjacent indentation marks Breakage (cold) C 120...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
... stereomicroscope, showed relatively brittle fracture features. No signs of significant ductility, as would be evidenced by stress whitening or permanent deformation, were apparent. Additionally, the fracture surface exhibited beach marks, suggesting that the crack had propagated via fatigue. Fig. 1...
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
... grinding damage, machining marks or nicks, and quench cracks resulting from heat treating operations. Frequently, stress concentrators are introduced during hot or cold forming of shafts; these include surface discontinuities, such as laps, seams, pits and forging laps, and internal imperfections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001580
EISBN: 978-1-62708-229-7
... to the surface of the canister as it is rotated. The distance measurements are very precise with resolution to approximately 0.2 µm. Based on the calibration data generated, the accuracy of these distance measurements is ±10 µm, with 95% confidence. Test Preparations Reflectivity Error Mapping the Weld...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4