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machine-cut patterns

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001382
EISBN: 978-1-62708-215-0
... at the grease port and surface groove located at midspan. Drillings machined from the bolt underwent chemical analysis, which confirmed that the material was AISI 1045 carbon steel, in accordance with specifications. Two sections cut from the bolt were subjected to metallographic examination and hardness...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
..., approximately 30% of its expected life. The disk, cut from the mandrel, was macroetched (10% aqueous nitric acid), revealing a heavily decarburized surface. The decarburization occurred during service. Fig. 48 Runner block made from a proprietary hot work tool steel that was used to die cast aluminum...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
... be determined. Only after careful visual examination has been completed should any destructive work be considered. In certain cases, various nondestructive examination techniques—for example, ultrasonics, x-ray, or magnetic-particle inspection—should be implemented before cutting to obtain a more complete...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001648
EISBN: 978-1-62708-234-1
.../fabrication process (heat treatment and machining). In this regard, when the other three couplings on the shaft assembly were removed subsequent to the fracture of coupling 3, personnel found it necessary to make longitudinal cuts in the walls of these couplings. A representative of such a cut can be seen...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003542
EISBN: 978-1-62708-180-1
... base of Hertzian cone. SEM; picture width ∼300 μm. Source: Ref 9 Machining Flaws When glasses and ceramics are machined or when they are cut using a diamond saw, extensive subsurface damage is produced. The crack systems are similar to those seen at indentation or impact sites but are still...
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
...; but there is a need to find out what has happened in the spalled areas. The consistency in the spalled pattern is that every spalled tooth has a spalled area 1 1 2 in. from one open end. Therefore, both eight-tooth sections should be cut parallel to and at a plane 1 1 2 in. from the end face...
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
...-Element Bearings” in this Volume. Wear Wear of metal parts is commonly classified into either of two categories: abrasive wear or adhesive wear. Abrasive Wear Abrasive wear, the undesired removal of material by a cutting mechanism, can reduce the size and destroy the proper shape of a shaft...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001907
EISBN: 978-1-62708-217-4
... requirements. Second, macroetching showed that the bolts has been machined from stock rather than forged, and the threads cut rather than rolled. It was also determined that hydrogen-assisted stress-corrosion cracking also played a part in the failure of the high-strength bolts. Missile launchers...
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
... on specimens of St 35 carbon steel (0.18% C max, 0.40% Mn min, 0.35% Si max, 0.05% P max, 0.05% S max) with ultimate tensile strength of 559 MPa (81 ksi) and high-quality Cr-Ni-Mo alloy steel with ultimate tensile strength of 726 MPa (105 ksi) (similar to grade 9840). Specimen blanks were cut from the surfaces...
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
... cooled, cut-off machine. The cut sample was mounted in epoxy so as to reveal a transverse section of the plate. The sample was prepared by standard metallographic procedures with the final polish being carried out with 1 micrometre diamond paste. The etchant used was a mixture of: 10mL HNO 3 , 10mL...
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
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0091853
EISBN: 978-1-62708-223-5
... plastically deform under the compressive force of the quartz. The angle that the cutting edge of the particle makes with the wear surface is often referred to as the rake angle in cutting during machining operations. The plowing mechanism of material removal is illustrated in Fig. 5 . In this case...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001558
EISBN: 978-1-62708-217-4
... hydrogen main fuel control valve, which ruptured during testing of the rocket engine of which it was a part. The area where the crack initiated comprised a cut-out in the internal surface to accomodate a cam follower bearing which was part of the valve operating mechanism. A schematic of the longitudinal...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001326
EISBN: 978-1-62708-215-0
... obtained from several of the failed thermowells by transverse and longitudinal cutting at the tip regions. Radiography Sample radiography at the tip regions of a few of the failed thermowells revealed linear indications along the axes. Scanning Electron Microscopy/Fractography The outside...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... consistent with load pattern rather than being machined from blanks cut from mill-rolled bar. Classification of Gear Failures Systematic analysis of a gear failure begins with classification of the failure by type, or mode. The mode of failure is determined from the appearance of the failed gear...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001022
EISBN: 978-1-62708-214-3
... undercarriage leg, showing general location of cracks and the material represented by parts 1, 3, 4, and 5. The major cracks in parts 1, 4, and 5 were opened by appropriate saw cuts and impact blows. The opened fractures are shown in Fig. 2 (part 4), and Fig. 3 (part 1), which represent one...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... that are much less damaging to the structure. Laboratory abrasive-wheel cutting is recommended to establish the desired plane of polish. The most commonly used sectioning device in the metallographic laboratory is the abrasive cutoff machine. All abrasive-wheel sectioning should be performed wet. An ample...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... in a laboratory, the requirements for on-site testing may involve the use of portable laboratories with metallographic equipment for grinding, mechanical polishing, and etching. Small specimens can be cut from a part on the site for preparation, examination, and photography immediately or upon return to a fully...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001725
EISBN: 978-1-62708-229-7
.... A series of tensile tests was made on specimens cut parallel to and transverse to the axis of rotation of the retaining ring with the following average results: Longitudinal Transverse Ultimate strength 125,425 130,000 psi. Yield (0.2% offiset) 74,450 79,350 Elongation in 2 in. 9.5...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001065
EISBN: 978-1-62708-214-3
... the accident. Circumstances Leading to Failure Pertinent Specifications Five specimens from the failure were evaluated. The first specimen contained material from the pipe, elbow, and weld. Chemical analysis samples and an optical mount were cut from this specimen, and the balance of the material...