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composite patch repair

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870517
EISBN: 978-1-62708-314-0
... inside the skin. Normal composite drilling and fastener installation procedures are used. Both protruding patches ( Fig. 19.9 ) and flush patches ( Fig. 19.10 ) can be designed, although protruding patches are easier to install. Fig. 19.8 Bolted repair concept. Source: Ref 1 Fig. 19.9...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460277
EISBN: 978-1-62708-285-3
... and foremost are the coating microstructure, density, phase evolution (for alloy systems), and distribution (for composite coatings). The coating surface finish and residual stress play especially important roles in applications in which it is common for localized or patch repairs to be carried out...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460227
EISBN: 978-1-62708-285-3
... reported an annual cost for H-60 main gearbox corrosion of $10.8 million to the Navy and $6.7 million to the Army, for a total of approximately $17.5 million for 600 helicopters. Conventional repair processes such as welding, plating, or patching with composite material often either impart additional...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870235
EISBN: 978-1-62708-314-0
... be used to impregnate dry carbon cloth for repair patches or injected into cracked bondlines or delaminations. Thicker pastes are used to bond repairs where more flow control is required. For example, if the material has too low a viscosity and is cured under high pressure, the potential for bondline...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870401
EISBN: 978-1-62708-314-0
..., the plasticizing effect of moisture can actually be beneficial in that the adhesive becomes more ductile and forgiving. Absorbed moisture can be a detriment when conducting elevated-temperature repairs. The moisture can inhibit proper cure of the repair patch or adhesive or, if present in sufficient quantities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930329
EISBN: 978-1-62708-359-1
... and for overlay cladding, service conditions during repair, and welding procedural idiosyncrasies of cobalt-base alloys. chemical composition fusion zone segregation grain boundary precipitation grain growth heat treatment heat-affected zone hot cracking nickel alloys porosity weldability...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... of Welding Fusion welding relies on melting and solidification of either base alloys of the components to be joined or base alloys plus a filler that may have: The same nominal composition of the base alloys (assuming that joining is of components of the same composition) A composition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430204
EISBN: 978-1-62708-253-2
...). There can also be formation of a compound Fe(OH) 2 (i.e., ferrous hydroxide) in the presence of moisture. The composition of an oxide layer varies considerably for carbon and low-alloy steel pipes and tubes with less than 3% Cr, depending on the temperature. For example, below 570 °C (1060 °F...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... of pressure vessels are usually made from rolled plate, while nozzles are forgings. This requires that the steels have sufficient ductility for forming and are readily weldable. Weldability of steels is important not only for initial fabrication but also for future field repairs or modifications. Weld repairs...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... be most reliably interpreted. Ultrasonic inspection can also be used to determine the shape of graphite particles in cast iron. Eddy current and other closely related electromagnetic methods are used to sort castings for variations in composition, surface hardness, and structure. Infrared thermography...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280203
EISBN: 978-1-62708-267-9
... monoxide, or water because of their high content of oxide-forming metals, such as nickel, cobalt, aluminum, and chromium. The resulting oxides vary widely with alloy composition and furnace atmosphere. Usually, pickling is required for their removal. Scale conditioners are useful. Scale develops on hot...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030019
EISBN: 978-1-62708-282-2
... are not susceptible to galvanic corrosion, and their ease of polarization tends to minimize adverse galvanic effects on other metals or alloys. Because of the ease with which they pick up hydrogen in the atomic state, they may themselves become embrittled in galvanic couples. Tantalum repair patches in glass-lined...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250257
EISBN: 978-1-62708-345-4
... (example 4). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. Original magnification at 119×. (c) Morphology in the large-grain base material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... through internal mechanical impact or abuse; in such cases, the repair is performed with tantalum patches or a similar material. Modular Glass Components Modular glass components are employed in solvent recovery applications where the use of glass ensures product purity. Porcelain Enamels...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030292
EISBN: 978-1-62708-282-2
...-dependent degradation due to corrosion usually defines scheduled and unscheduled shutdowns so that corrosion damage in piping and equipment can be inspected and/or repaired. This operational scenario can be extremely expensive. Single-incidence costs of major failures and related releases have been...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.sch6.9781627083546
EISBN: 978-1-62708-354-6
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280287
EISBN: 978-1-62708-267-9
... alloys, discusses the formation of oxide scale in the presence of mixed gases, and explains how alloy composition contributes to oxide growth. The chapter discusses the underlying chemistry of hot corrosion, how to identify its effects, and how it progresses under various conditions. It also discusses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.9781627082679
EISBN: 978-1-62708-267-9
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780383
EISBN: 978-1-62708-281-5
... ANALYTICAL TECHNIQUES are available for the study and characterization of surfaces. These techniques provide data about the physical topography, physical properties, chemical composition, and chemical structure of the surfaces under study. Most of these techniques are based on bombarding the surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910363
EISBN: 978-1-62708-250-1
... resistant system. Accessibility for Future Repair If future repair will be difficult or expensive, a longer-life coating system should be specified. Consequences of Coating Failure If a coating failure will be disastrous, such as in tanks holding highly corrosive chemicals or in nuclear power...