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Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... Abstract A major cause of failure in components subjected to rolling or rolling/sliding contacts is contact fatigue. This article focuses on the rolling contact fatigue (RCF) performance and failure modes of overlay coatings such as those deposited by physical vapor deposition, chemical vapor...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... and metal dusting, sulfidation, hot corrosion, chloridation, hydrogen interactions, molten metals, molten salts, and aging reactions including sensitization, stress-corrosion cracking, and corrosion fatigue. It concludes with a discussion on various protective coatings, such as aluminide coatings, overlay...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... containing sulfur and oxygen. The large cavities appeared on the bucket surface despite the protective overlay coating. This occurrence excluded buckets from further service. The case of nozzle failure was also connected with hot corrosion phenomena. However, in this case, cracking of the platform took place...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
.... Goward G.W. : Progress in coating for gas turbine airfoils . Surf. Coat. Technol . 108–109 , 73 – 79 ( 1998 ) 10.1016/S0257-8972(98)00667-7 2. Tolpygo V.K. , Clarke D.R. : Rumpling induced by thermal cycling of an overlay coating: the effect of coating thickness . Acta Mater...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... the time until failure. Therefore, surface treatments such as induction hardening and nitriding are commonly applied to bearing steels ( Ref 3 , 116 – 118 , 135 ). Another option for increasing surface hardness is to add an overlay coating to the surface. These coatings are generally either ceramic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
..., and Cobalt Alloy Weld Overlay Materials , Coatings and Bimetallics for Aggressive Environments , Sisson R.D. Jr. Ed., American Society for Metals , 1985 , p 125 – 142 19. Zimmerly C.A. , Inal O.T. , and Richman R.H. , Explosive Welding of a Near-Equiatomic Nickel-Titanium...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... Abstract High-temperature corrosion can occur in numerous environments and is affected by various parameters such as temperature, alloy and protective coating compositions, stress, time, and gas composition. This article discusses the primary mechanisms of high-temperature corrosion, namely...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003568
EISBN: 978-1-62708-180-1
... by particles having higher kinetic energy, thus increasing the rate of damage. Erosion by fly ash causes polishing, flat spots, wall thinning, and eventual tube rupture. Fly-ash erosion can be controlled by coating tube surfaces with refractory cements or other hard, wear-resistant materials, although...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... Fig. 5 A micrograph of the fracture surface (gold coated) of Fig. 4 revealing multiple crack origins, a smooth morphology, and arrest marks Fig. 6 A micrograph of the exterior bracket surface adjacent to the fracture revealed a strong degree of crack formation. Fig. 7...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
..., and eventual tube rupture. Fly ash erosion can be controlled by coating tube surfaces with refractory cements and other hard, erosion-resistant materials, although this reduces the heat-transfer capability of the surface. An alternative method is the use of baffles to channel gas flow away from critical areas...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... are used for blade applications: diffusion coatings and overlay coatings. Both types of coatings result in a surface layer enriched in oxide-forming elements to promote formation of a protective oxide layer. However, the protective coatings themselves are subject to degradation under engine operating...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... always lubricated. The soft metals are sometimes used in thicknesses up to 6 mm (0.24 in.), but to increase fatigue resistance, the soft metals are coated or plated on a steel (or other stronger metal) backing in layers as thin as 25 μm. The major groups of soft metal bearing materials...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... to visual inspection/light optical microscopy, metallography, electron microscopy, energy dispersive spectroscopy, chemical analysis, and mechanical testing. It was observed that the vacuum cadmium coating adjacent to the fracture plane had worn off and corroded in service, thus allowing pitting corrosion...
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
... supplanted by replaceable insert bearings made from multilayer laminated metals. To increase the fatigue resistance of the bearing material, often the soft metals are coated or plated on a steel (or other stronger metal) backing in layers as thin as 25 μm. With such an arrangement, fatigue failure can...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001051
EISBN: 978-1-62708-214-3
... following the crack outline ( Fig. 1 ). Three elliptically shaped boat samples of the shell material were evaluated: The first fracture face examined was a crack associated with sample C. This specimen was in two as-received sections. The specimen surface was coated with a thick, black oxide film...
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
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
... parts are also discussed. The article concludes with a discussion on the influence of metallurgical factors and fabrication practices on the fatigue properties of materials, as well as the effects of surface coatings. abrasive wear adhesive wear axial fatigue bending fatigue brittle fracture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
... resistance is also needed. Multiphase materials and composites having high strength with passivation capability can be suitable choices; for example, WC-reinforced composites with NiCrBSi alloy matrices can have satisfactory performance. Applications include WC-reinforced hardfacing overlays for mining...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006771
EISBN: 978-1-62708-295-2
... be compared to reference materials to infer what should or should not be present. Reference materials can include starting substrate materials (before and after cleaning processes); pure compounds and coatings used in the manufacturing of the device; dried solvents, oils, greases, and cleaning solution...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
...-corrosion cracking, hydrogen embrittlement, and liquid-metal embrittlement of bolts and nuts. The article explains the most commonly used protective metal coatings for ferrous metal fasteners. Zinc, cadmium, and aluminum are commonly used for such coatings. The article also illustrates the performance...