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repair defects

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Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
... and presents drawbacks and limitations of these techniques. Generic flaw types and flaw-producing mechanisms are listed in a table. The article discusses metal-to-metal defects, adherend defects, honeycomb sandwich defects, repair defects, and in-service defects. It reviews the methods applicable...
Image
Published: 01 January 2003
Fig. 8 Patch repair of a defect in a rubber lining. Courtesy of Blair Rubber Company, Akron, OH More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003456
EISBN: 978-1-62708-195-5
... the considerations for maintainability of the composite structures during the conceptual design phase. Sources of the defects and damage, such as manufacturing defects and in-service defects, are reviewed. The article describes the nondestructive inspection methods that are used in the repair of composite structures...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001476
EISBN: 978-1-62708-173-3
... to repair weld defects and structural failures. It further discusses the preliminary assessment and base-metal preparation involved in weld repair. Furthermore, the article provides information on the general repair guidelines that are followed to ensure successful weld repairs of both ferrous (carbon...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003452
EISBN: 978-1-62708-195-5
... extension, careful attention must be paid to managing both corrosion and fatigue, because they are the main problems associated with aging aircraft structure. Composite bonded repair technology ( Ref 1 ) enables cost-effective and durable repairs to be made to damaged or defective aircraft structure...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003454
EISBN: 978-1-62708-195-5
... worsening of the defect while the structure is subjected to operational loading. Cosmetic Cosmetic repairs are designed to repair localized surface defects to the original profile and to prevent moisture ingress. Temporary Temporary repairs are only to be conducted when there are operational...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002381
EISBN: 978-1-62708-193-1
... in which a crack grows to the permissible size. Damage tolerance analysis is used to obtain this information. Damage tolerance is the property of a structure to sustain defects or cracks safely, until such time that action is (or can be) taken to eliminate the cracks by repair or by replacing...
Series: ASM Handbook
Volume: 23A
Publisher: ASM International
Published: 12 September 2022
DOI: 10.31399/asm.hb.v23A.a0006890
EISBN: 978-1-62708-392-8
... implantation group, and an in situ bioprinting group. In all groups, a chondral defect was made in the center of the trochlear groove. In the in situ bioprinting group, the defects were directly repaired with the 6-DoF robot using a biomaterial ink comprising methacrylated hyaluronic acid (HAMA...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003459
EISBN: 978-1-62708-195-5
... about the depth of the defect, down to the particular ply level in many cases. Pulse-echo primarily is used at repair facilities or at manufacturing facilities to give more detailed information about a defect uncovered by another method. It does not work well through a core material to detect problems...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001373
EISBN: 978-1-62708-173-3
... that refines the grains in older welds and improves the structural properties of the thermite weld to the level of those of electric flash butt welds A head wash repair weld that can repair discontinuities on the running surface of the rail head. (In the head wash repair, rail surface defects...
Image
Published: 01 January 2001
Fig. 1 Example of the shear stress distribution in a bonded repair where the defect remains in the structure and the substrate is restrained from bending More
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006301
EISBN: 978-1-62708-179-5
... to properly weld cast irons. Oxyfuel welding is widely used to repair minor defects in gray cast iron, less frequently for repair of ductile iron castings, and seldom for malleable irons. A key difference between arc and oxyfuel welding is temperature and rate of heating. An oxyacetylene flame has...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005614
EISBN: 978-1-62708-174-0
... beam-welded joints is also included. The article concludes with discussions on EBW defects, the use of filler metal for weld repair, and the control plans, codes, and specifications of the EBW process. electron beam welding electron beam welding defects filler metal heat-affected zone...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005725
EISBN: 978-1-62708-171-9
... Abstract This article begins with a description of the advantages and disadvantages of thermal spraying. It provides a discussion on the importance of substrate processing prior to coating and the role of undercutting in repair. The article reviews the steps for substrate preparation, namely...
Image
Published: 12 September 2022
Fig. 8 In situ bioprinting of bone tissue and calvaria defect, (a) schematic representation and fluorescence images of the actual bioprinted geometries; (b) histologic evaluation by hematoxylin–eosin–safran staining of bone repair. Source: Ref 20 . Creative Commons License (CC BY 4.0), https More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003457
EISBN: 978-1-62708-195-5
... operations. Although these are not considered to be “failure modes” unless the defects are specifically documented as allowable damage/defects in the Structural Repair Manual, operators must treat them as any other damage discovered during inspections. Therefore, if not allowed, the defects have the same...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005345
EISBN: 978-1-62708-187-0
.... It is suggested that typical weld industry standards and manufacturers recommendations be reviewed and adhered to when considering filler metal options. Removal of Casting Defects The casting defect can be removed prior to repair by grinding and thermal cutting or gouging to clean metal. Thermally cut...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005338
EISBN: 978-1-62708-187-0
... defects centrifugal casting chemical properties hot isostatic pressing induction skull melting investment casting machining mechanical properties postweld heat treatment static casting vacuum arc skull melting vacuum induction melting foundry melting rammed graphite casting weld repair...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001439
EISBN: 978-1-62708-173-3
... of the total amount of welding that is done on magnesium alloy castings is for repair. Repair welding is usually limited to the repair of defects in clean metal, including broken sections, sand or blowholes, cracks, and cold shuts. Repair welding is not recommended in areas containing flux or oxide inclusions...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001435
EISBN: 978-1-62708-173-3
... be done without preheat, provided the area tested will not require subsequent machining. Base-Metal Preparation The only way to deposit a sound weld on a cast iron is to begin with a sound, clean base metal. When a known crack or defect is to be repaired, it should be completely removed before...