1-20 of 72 Search Results for

circumferential wear marks

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.c9001846
EISBN: 978-1-62708-241-9
... chromium steel circumferential wear marks peel pits heat tinting fatigue striations SEM imaging fatigue strength 42CrMo (chromium-molybdenum alloy steel) 38CrMoAl (chromium-molybdenum-aluminum alloy steel) Background A locomotive turbocharger main shaft and a bearing sleeve assembled...
Image
Published: 01 December 2019
Fig. 3 Surface damage morphology of main shaft ( a ) showing serious circumferential wear marks and ( b ) showing serious peel pits More
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
... surface of the bearing sleeve and brown oxidation tint is exhibited on the cylinder surface. Fig. 1 Failed sleeve and a new sleeve: ( a ) failed sleeve and ( b ) new sleeve Densely distributed deep circumferential wear marks ( Fig. 1a ) are present on the external surface in the left region...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046222
EISBN: 978-1-62708-217-4
... in inches. (b) Longitudinal score mark (region A) and circumferential scratches (arrow B) on shank that had been peened over. A galled area (arrow C) is also visible. At every overhaul, the spindles were fluorescent-magnetic-particle inspected, and the surface was carefully examined for evidence...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
... marks (beach marks) Optical examination of the surface (roll surface) of the fragment revealed a sliding wear pattern and a characteristic network of multiple interconnecting cracks ( Fig. 4 ). This surface crack pattern might be attributed to the formation of firecracks or thermal cracks (known...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001115
EISBN: 978-1-62708-214-3
... The failure selected for analysis was a circumferential fracture of the tubing in a connection ( Fig. 1 ). Reported to be a Hydril CS connection, the pin end parted near the last threads. The external box surface exhibited mechanical damage marks from the fishing operation. Except for these marks, no signs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001597
EISBN: 978-1-62708-236-5
... diagonal and then circumferential near each end of the journal. Circumferential abrasive wear patterns were present over the entire journal surface, with more severe areas located along the center and near an area of spalling along the cracks ( Fig. 3 ). Several areas on the surface exhibited small...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
.... Several radial marks are also visible on the surface of the seal (near arrows). Fig. 11 Optical micrograph of the replicated surface of the inboard seal showing a radial groove (horizontal) and a circumferential groove (vertical). The scale bar is 200 µm in length. The depth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0046242
EISBN: 978-1-62708-236-5
... into the gear teeth. Severe wear and broken teeth were also observed. A crack was found that apparently started in the keyway and continued circumferentially around the coupling (Details A and B, Fig. 1 ). Spectrographic analysis of the coupling material revealed that it was made of a chromium-molybdenum...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0048804
EISBN: 978-1-62708-230-3
... surface were found to exhibit chevron marks typical of fatigue or raised points or tears pointing in the direction of the probable origin of failure. The characteristics of the thinwall cast iron structures like the variation in composition due to pouring from multiple ladles, variation in solidification...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... Both lots of tubing were visually examined and found to contain longitudinal and circumferential external cracks and to be heavily stained with obvious liquid runoff and drip marks. On the tube samples examined, the majority of the longitudinal cracks ran along the top and bottom of the tubes; most...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
..., but axial grooves are easier to make. Fig. 3 Groove arrangements in sliding bearings Apart from axial, circumferential, and spiral grooves, the surfaces of bearings may be textured to improve wear resistance and reduce energy losses by reducing friction. In recent years, improving or modifying...
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
... that will not remove or obliterate any rust, oxidation, burnishing marks, or other pertinent evidence. Surfaces of all areas that may have been involved in or may have contributed to the failure should be examined, noting scuff marks, burnished areas, abnormal surface blemishes, and wear. These marks should...
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
..., or other pertinent evidence. Surfaces of all areas that may have been involved in or may have contributed to the failure should be examined, noting scuff marks, burnished areas, abnormal surface blemishes, corrosion, and wear. These marks should be associated with some abnormal service condition...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
... ranging from 31.4 to 34.7 mm (1.2 to 1.4 in.), indicating about 3.5 mm (0.14 in.) of mechanical wear of the shaft in the threaded portion of the sleeve nut. A 3 mm (0.12 in.) deep circumferential groove was visible 45 mm (1.7 in.) from the fracture surface. Fig. 1 The drive-end side of the shaft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
... into heavy contact with one of the flanges of the inner race, resulting in smearing and wear to the extent shown by those marked X and Z. Although, in these two rollers, the zone of final fracture was located adjacent to the smeared end, this was not true of all the cracked rollers, since as shown by roller...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... all were axial in orientation, except for the few small circumferential components shown in Fig. 4 . Fig. 4 Axial cracks on recirculation pump shaft revealed by dye-penetrant examination. A diffuse, wavy circumferential line marking the lower boundary of the chromium surface plating may...
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
... produces heavy score marks and polished regions, both in the bore of the inner ring and on the shaft. The end face of the ring, which is in frictional contact with the shoulder on the shaft, shows a characteristic scuffing effect typified by heavy circumferential score marks and, in severe cases, by short...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001179
EISBN: 978-1-62708-228-0
... immediately or gradually into a circumferential transverse crack ( Fig. 2 ). Some pins also showed transverse fractures in the coarse thread ( Fig. 2 ). No fractures or cracks could be observed at the bore rods. It was subsequently established that steels of lower strength are considerably less sensitive...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
... Abstract This paper deals with disk drive failures that occur in the interface area between the head and disk. The failures often lead to the loss of stored data and are characterized by circumferential microscratches that are usually visible to the unaided eye. The recording media in disk...