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Slip bands

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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
... Abstract A type 316L stainless steel angled plate failed. The fatigue fracture was found to have occurred at a plate hole. Symmetric cyclic bending forces were revealed by the fatigue damage at the fracture edge at the top surface of the plate. Fatigue striations and slip bands produced on the...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001337
EISBN: 978-1-62708-215-0
...) suggests that they formed at sites associated with internal strain bands (possibly slip planes that formed in the steel from the original manufacturing of the tube) in the steel ( Ref 2 , 3 ). Thus, the term “slip-plane graphitization” has been coined. Nucleation then proceeds at sites of higher...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048423
EISBN: 978-1-62708-226-6
... the formation of secondary cracks along glide planes. On the section through the fracture surface, another secondary crack formation is found ( Fig. 3c ). At these cracks, multiple slip bands also formed in connection with the fracture surface, and the cracks follow along these structures. One of the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001424
EISBN: 978-1-62708-233-4
... Abstract Two examples concerning fabricated mild steel rotor spiders which failed due to lack of torsional rigidity, probably supplemented by the presence of high internal stress, are described. The machine concerned in the first case was a 3,000 hp three-phase slip-ring motor. In the second...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001175
EISBN: 978-1-62708-231-0
... left of these striations (in Fig. 1 on the right) a darkly etched band, which runs parallel to the rivet seam can be seen. This deformation is due to the caulking of the plate edge. The zones of slip are concentrated around the rivet holes, where the plate material is cold worked by the pressing of...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
... air), and there was very limited plasticity. Macroscopic progression markings were observed on fracture surfaces of several couplings but were not generally evident. At very high magnifications, numerous slip lines, progression markings, and striations were observed. In a few cases, where complete...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... crystallographic features have been observed on the fatigue surfaces of many metals and result from nonreversible slip on preferred planes. Slip bands of highly localized deformation are thus generated, resulting in extrusions and intrusions at the surface. These then penetrate along the length of the persistent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089258
EISBN: 978-1-62708-218-1
... section through one of the fatigue crack origins revealed slip bands emanating from the microcracks ( Fig. 5 ). Fig. 2 Crack in sleeve (arrows). 2.5× Fig. 3 Fatigue cracking from the outside diameter (OD) of the sleeve (large arrow). Area between small arrows shows evidence of ductile...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001664
EISBN: 978-1-62708-226-6
... device which were parallel to the fracture surface. These indicate that fracture had started at more than one level. Slip bands were observed on the surface of the failed device at locations adjacent to the fracture surface ( Figure 9 ). These were caused by plastic deformation as a result of bending...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
...-boundary carbides (in polycrystalline materials) to reduce the creep rate by inhibiting grain-boundary sliding The way in which cracking occurs could be envisioned as oxidation of a grain boundary at high temperatures and cracking by slip-band impingement at low temperatures ( Ref 7 ). A crack...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0089663
EISBN: 978-1-62708-229-7
... diffusion. Therefore, precipitation, which is a diffusion-controlled process, is more advanced in the slip bands of a material subjected to fatigue. In this case, the fatigue was thermal fatigue caused by repeated temperature changes in the turbine over a period of about ten years. These temperature changes...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... could be envisioned as oxidation of a grain boundary at high temperatures and cracking by slip-band impingement at low temperatures ( Ref 13 ). A crack initiates when the extent of penetration is approximately the same order of magnitude as the slip-band spacing. For Waspaloy, it has been shown ( Ref 14...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
... propagation at area C, which was consistent with fatigue crack propagation mode. Fatigue cracks initiated by the intrusion-extrusion mechanism from persistent slip bands are referred to as Stage I cracks, which form on the active slip plane that lies at an angle to the stress axis [ 5 – 7 ]. Figure 5 shows...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... hold ( Fig. 12 ). As observed in RSL testing, the failure mode was predominantly IG, with out-of-plane cracking, and slip band activity notable on the IG facets. Fig. 12 Calculated crack length as a function of time for constant displacement testing of ASB in laboratory air (HTP-9) at applied...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001770
EISBN: 978-1-62708-241-9
.... 6(a) through (d) . Transgranular cracks are evident in Fig. 6(a) and (b) running across the grains with Cr-carbide particles within the cracks. An interesting feature observed in the SEM micrographs was the presence of Cr-carbides at slip bands and twin boundaries, as shown in Fig. 6(c) and...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
.... (b) Area with fracture planes of three differently oriented grains (single arrow, a). (c) Shearing structures and dimples in grain identified by the numeral 1 in (b). (d) Slip traces in grain identified by the numeral 2 in (b). (e) Gas holes with dendritic freezing surfaces (double arrows, a). (f...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... microscopic level, crack nucleation in persistent slip bands and transgranular cracking during fatigue seem to be the rule, especially in smooth-section components (the zone of persistent slip bands is unlikely to be visible in materials with a cracklike imperfection). Transgranular cracking is encouraged by...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... fracture mechanism in low-cycle fatigue, such as when IG oxidation initiates IG fatigue cracks (depending on temperature and the cyclic waveform and frequency). On the microscopic level, crack nucleation in persistent slip bands and transgranular cracking during fatigue seem to be the rule, especially...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... crack initiation below 0.6 T m [2] is extensive Stage I cracking along persistent slip bands [ Ref 3 , 8 , 9 , 10 ]. This is true for both wrought and cast alloys. At temperatures greater than 0.5–0.6 T m , fatigue crack initiation usually occurs intergranularly and crack propagation can be either...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... cleavage fracture to support critical shear and normal stress laws was obtained prior to 1935 by macroscale observation. Photographs are available in Schmid and Boas ( Ref 3 , 6 ). Slip band extrusions on the surface of smooth single crystals were resolvable and photographed, and they implied evidence of...