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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001759
EISBN: 978-1-62708-241-9
... assembly. drive shaft bearing cup brittle fracture heat treatment carbon steel shallow case endurance and load testing fracture toughness SAE-AISI 1117 (11xx resulfurized steel) UNS G11170 Introduction Problem Statement Analysis of Problem Experimental Procedure Results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001462
EISBN: 978-1-62708-224-2
... at the mid-length of the sides. Brinell hardness values confirmed that the link was made from the higher tensile grade of material. The cracks were due to fatigue, there being no indications that the weld was initially defective. Butt welds Chains Steel chain Fatigue fracture The following case...
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
... that these four lines experienced an aggressive environment was too short for SCC initiation. The line with shallow SCC attack contained intermediate amounts of water. In the case of the cracked line, over four gallons of water had been trapped at low elevations of the pipe for about 5 months, apparently due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001395
EISBN: 978-1-62708-220-4
...Abstract Abstract Leakage which developed from two storage vessels handling a mixture of trimethyl formate and chloroform took place from the dished head at the edge of the circumferential weld to the shell which incorporated a backing ring. Some shallow pitting had occurred under the backing...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001338
EISBN: 978-1-62708-215-0
... conditions. Water with high concentrations of oxygen and carbon dioxide is a common pitting agent for copper. In any event, it is apparent that, for pitting to occur, the surface must be wet. In general, pitting usually consists of a small number of deep pits or a large number of shallow pits. In the present...
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
... shallow (0.013 mm, or 0.0005 in.) zones exhibiting ductile shear (see area between arrows in Fig. 3 ). Viewing the OD surface of the sleeve adjacent to the fracture plane revealed an extensive network of microcracks on the OD in the radius between the bulb and cylindrical portions ( Fig. 4 ). A cross...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001452
EISBN: 978-1-62708-232-7
... of the fracture resulted from fatigue. Shallow oxidized regions adjacent to the inside surface of the bend indicated pre-existing cracks. A sulphur print on the edge of the bracket showed the material was rolled from a rimming steel ingot. The general appearance of the fracture, and the fact failure took place...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001555
EISBN: 978-1-62708-217-4
.... On the basis of investigation results and observations, it was concluded that the transverse breakage of the axle had occured intergranularly in a brittle manner, possibly, initiated by a shallow zone of fatigue along the sharp radius acting as stress riser. In this case, the following facts were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001504
EISBN: 978-1-62708-217-4
... failure analysis reports were surveyed to provide an overview of structural landing gear component failures as experienced by the Canadian Forces over the last 20 years on more than 20 aircraft types, and to assess trends in failure mechanisms and causes. Case histories were selected to illustrate typical...
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
... function. Implant failure is not identical with a faulty implant, because there can be purely biological and biomechanical reasons for implant breakage or malfunction. In most cases, only a thorough analysis of the clinical conditions under which an implant failed can explain the reason for failure...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001801
EISBN: 978-1-62708-241-9
...Abstract Abstract Both rods in a Harrington rod cervical stent failed after a short time in service. Metallurgical analysis revealed a significant number of notches as well as enlarged grain size in one of the two rods, rough shallow-cracked surfaces along the bend profiles, possible signs...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048757
EISBN: 978-1-62708-234-1
... and increased grain size. Hydrogen and oxygen absorption was revealed by the presence of hydrides and the shallow surface embrittlement and thus susceptibility to cracking at ambient temperatures was observed. It was concluded that the titanium tubes were embrittled due to overheating the tubes and the severe...
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
... stress includes applied plus residual stress. The surface is located at the left of each diagram. In (a), subsurface initiation occurs for the shallow case because total stress exceeds local fatigue strength in the shaded (subsurface) area. In (b), subsurface initiation occurs for stress curves 3 and 4...
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
... weight, excessive belt tension, gear tooth reaction, or mal-alignment of driving couplings, and these possibilities should be investigated when trouble of this form is found. In cases of failure of this type, an extension of the service life may be obtained by partially rotating the outer race...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001515
EISBN: 978-1-62708-229-7
... the axial length of the crack ( Figure 2 ). The crack was tightly closed along most of its length and made several shallow angle bends, 10 – 20°, before coming to a stop. There was no evidence of crack branching, nor did the crack bifurcate and tear circumferentially around the tube, as had been seen...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001502
EISBN: 978-1-62708-234-1
... of the surface hardened zone. Also, along the profile of the teeth that had not failed, the hardened case was as shallow as 0.020 in. Chemical analysis confirmed the material to be SAE 4147H, as specified. ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
...Abstract Abstract Two types of chromium-plated hydraulic cylinders failed by cracking on their outer surfaces. In one case, the parts had a history of cracking in the nominally unstressed, as-fabricated condition. In another, cracks were detected after the cylinders were subjected to a pressure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048420
EISBN: 978-1-62708-226-6
...Abstract Abstract Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head was studied. The attack on the 316LR stainless steel was only shallow. Mechanical grinding and polishing structures were...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
.... In the previously published articles, rolling contact fatigue is classified into two types: subsurface initiated (spalling and case crushing), and surface initiated (pitting and micropitting). According to the references [ 1 , 2 ], the surface-initiated cracks will nucleate preferentially due to stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0091009
EISBN: 978-1-62708-235-8
.... The crack was evident at the weld toe, but it did not follow the fusion line or HAZ, as is sometimes the case in hot cracks. The welding penetration was shallow and irregular. The base metal microstructure consisted of tempered martensite. Evaluation of the fabrication history and the analysis data...