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Published: 01 January 2002
Fig. 7 (a) Abrasive wear mechanisms and surface deformation as a function of pressure, P ; material hardness, H ; and fracture energy, G Ic . (b) Curves 1 to 3 correspond to the schematic in (a), possible schematic of the wear rate, W as a function of hardness, H of wearing material More
Image
Published: 15 May 2022
Fig. 7 (a) Abrasive wear mechanisms and surface deformation as a function of pressure P , material hardness H , and fracture energy G Ic . (b) Curves 1 to 3 correspond to mechanisms shown in (a), possible schematic of the wear rate W as a function of hardness H of the wearing More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001288
EISBN: 978-1-62708-215-0
... had failed in fatigue as a result of a high stress concentration in a sharp 0.6 mm (0.02 in.) radius fillet. Stress analysis and fracture mechanics predictions revealed that there was also danger of fatigue failure for platens with the design radius of 10 mm (0. 4 in.) if the press operates at 800...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001016
EISBN: 978-1-62708-236-5
... location, and the operation of similar presses was also observed. The large piece which broke off the press included a section of the ways and a heavy adjustable mechanism which normally rides on these ways. The weight of the broken section was estimated at several hundred pounds. There is no support...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090181
EISBN: 978-1-62708-229-7
... was considered generic, and the conclusion was that the primary failure mechanism was LCF. Material imperfections were a secondary deficiency that had the effect of causing the blades from the bad HIP lot to crack first. Gas turbine engines Hot isostatic pressing Low cycle fatigue Turbine blades Nickel...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... hardness of the die was 48 HRC. Owing to a damaged surface, the die was removed from the production line after 30,000 hits. The forging operation is performed with a 250-ton mechanical eccentric press, with the workpiece initially at 700°C with a lubricated contact. The drop of the up die is done in 20 ms...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046146
EISBN: 978-1-62708-217-4
... that the primary fracture initiated from multiple origins on both sides of a lubrication hole that extended from the outer surface to the bore of a lug in two cadmium-plated flanged bushings made of copper alloy C63000 (aluminum bronze) that were press-fitted into each bored hole in the lug. Sectioning and 2x...
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
... been injection molded from a commercially available, medium-viscosity grade of PC, formulated with an ultraviolet 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...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001287
EISBN: 978-1-62708-215-0
... Abstract A recurring piston shaft failure problem on the billet-loading tray of an extrusion press was investigated. Two shafts fractured within a period of 10 days. The shaft was machined from normalized EN3 (AISI C1022) steel stock without further treatment. Visual, microstructural, chemical...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001125
EISBN: 978-1-62708-214-3
... examination showed that the connector had undergone considerable plastic deformation and necking before fracture. The steel sheath was severely corroded, and the steel splice was pressed off-center in the axial direction inside the connector. Examination of the fracture surface and micro-structural analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001551
EISBN: 978-1-62708-233-4
... Abstract A multi-million dollar, four-color printing press used to produce a major weekly magazine was breaking pinions (shouldered shafts) on rolls. The cause of fracture was cyclic fatigue. Steel quality and heat treatment met expected standards. The pinion fracture showed multiple origins...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0045903
EISBN: 978-1-62708-223-5
... Abstract A 230 mm (9 in.) thick casing, fabricated from ASTM 235-55 low-carbon steel, of a 450 Mg (500 ton) extrusion press failed after 27 years of service. Initial visual examination revealed an area that exhibited multiple origins and classic beach marks radiating out approximately 75 mm (3...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001844
EISBN: 978-1-62708-241-9
.... The surface hardness and the case depth of gear tooth correspond to the specification. Anti-carburizing measure was not performed on the surface of oil-pressed hole as specification, leading to the presence of a case layer of 0.3–1.6 mm. The observed micro-mechanism on the fracture surface...
Image
Published: 15 January 2021
Fig. 28 Schematic illustration of the dissolution-reprecipitation mechanism in yttria-stabilized zirconia (YSZ), wherein the coating material dissolves in the molten glass and reprecipitates as one or more compositionally modified crystalline phases. CMAS, calcium-magnesium-alumino-silicate More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
... cracks during high-volume production processes, and hence, it is crucially important to understand their influence and the fundamental mechanism of the failures they cause. Additional information about RCF is provided in the article “Rolling-Contact Fatigue” in this Volume. Surface Crack Defects...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
.... First, they are obviously designed to produce parts with the desired configuration. Secondly, metalworking can develop a final shape with internal soundness and improved mechanical properties by: Improved internal quality due to compressive deformation Grain refinement and beneficial grain-flow...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001216
EISBN: 978-1-62708-217-4
... through) or stamped. Stamped dimples are preferred because they require a considerably smaller time expenditure than pressed. In order to check the dimple stamping machines and the dimpling process, dimpled specimens are produced which can then be tested mechanically and metallographically...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006946
EISBN: 978-1-62708-395-9
... Materials ,” D3878, Annual Book of ASTM Standards , ASTM 1986 • “ Standard Definitions of Terms Relating to Reinforced Plastic Pultruded Products ,” D3918, Annual Book of ASTM Standards , ASTM 1986 • “ Standard Definitions and Descriptions of Terms Relating to Dynamic Mechanical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003505
EISBN: 978-1-62708-180-1
... left a limited amount of space in which mechanics could work. A pilot hole was drilled with a 0.476 cm (0.19 in.) drill. The drill was held in a Jacobs chuck in a portable drill press that, in turn, was held to the workpiece by an electromagnet. After the pilot hole was finished, the drill press...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... Abstract An octagonal steel ingot weighing 13 tons made of manganese-molybdenum steel developed gaping cross-cracks on all eight sides in the forging press during initial pressure application. It was reported that the steel had been melted in a basic 12-ton arc furnace, oxygenated, furnished...