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Expansion joints

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Published: 30 August 2021
Fig. 6 Dissimilar-metal expansion joint failure. (a) Diagram showing the expansion joint braze where the intermetallic formed. (b) Cross section showing the intermetallic layer. Original magnification: 15×. (c) Cracked intermetallic between the copper braze (top) and the stainless steel weld More
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Published: 30 September 2015
Fig. 5 Chipping and corrosion on girder bottom flange at expansion joint. Courtesy of KTA-Tator, Inc. More
Image
Published: 15 January 2021
Fig. 4 Fractured gas turbine expansion-joint flange bolts that failed during service. Specified material for both bolts and mating nuts: zinc-plated carbon steel More
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Published: 15 January 2021
Fig. 30 Braze joint failure (Example 17). (a) Schematic of failed end of expansion joint braze where an intermetallic phase formed. (b) Cross section showing the intermetallic layer (arrow). Original magnification: 15×. (c) Cracked intermetallic phase between the copper braze (top More
Image
Published: 30 August 2021
Fig. 22 Upright supports for the handrail/guardrail were inadvertently placed on either side of the expansion joint. More
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Published: 30 September 2015
Fig. 9 Leaky expansion device. The steel located directly beneath this leaky joint clearly demonstrates severe corrosion when compared to the surrounding steel. Courtesy of KTA-Tator, Inc. More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003684
EISBN: 978-1-62708-182-5
... available methods of application should be considered. A castable material will shrink more than the gunitable material; therefore, expansion joints must be planned into the system in areas exceeding 6 by 6 m (20 by 20 ft) or where changes in planes will cause stresses to occur. A gunitable material...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006828
EISBN: 978-1-62708-329-4
... of the material, joint design, prebraze cleaning, brazing procedures, postbraze cleaning, and quality control. Factors that must be considered include brazeability of the base metals; joint design and fit-up; filler-metal selection; prebraze cleaning; brazing temperature, time, atmosphere, or flux; conditions...
Book Chapter

By J.F. Libsch
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001387
EISBN: 978-1-62708-173-3
.... The article illustrates several basic joint designs for induction brazing as well as typical coils and some frequent applications and lists joint parameters for parts which are to be brazed by induction heating. It concludes with a discussion on the effect of thermal expansion on stress in the joint...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002478
EISBN: 978-1-62708-194-8
...; and curved laminates. It provides information on controlled thermal expansion composites, metal-matrix composites, and ceramic-matrix composites. The article illustrates the types of bonded joints and concludes with a discussion on design for manufacturing. asymmetric in-plane laminates asymmetric...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001349
EISBN: 978-1-62708-173-3
..., low-melting phases, brittle phases, and different thermal expansions. Joint Interfaces While most similar-material welds are made with little concern for surface preparation, highly dissimilar-metal combinations are more sensitive. This happens for various reasons. In stainless steel...
Image
Published: 01 August 2018
Fig. 35 Dual-frequency inspection of tubesheet showing tube expansion, offset, and overlay regions of rolled areas. (a) Cross-sectional view of tubesheet region. (b) Traces showing typical rolled joints. (c) Traces showing incorrect tubesheet rolled joints. The high-frequency (700 kHz) traces More
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004159
EISBN: 978-1-62708-184-9
... is not a problem until tubes have been perforated. However, tube air heaters are often prone to poor gas distribution across the heat-exchanger surface. This leads to localized cool spots where dew-point corrosion takes place ( Ref 6 ). Ductwork, Expansion Joints, Inspection or Sampling Ports, and Access Doors...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005575
EISBN: 978-1-62708-174-0
... expansions. Joint Interfaces While most similar-material welds are made with little concern for surface preparation, highly dissimilar-metal combinations are more sensitive. This happens for various reasons. In stainless steel to aluminum alloy welds, the oxide surface that forms on the aluminum picks...
Image
Published: 01 January 1993
Fig. 14 Isothermal fatigue life calculation for thermal fatigue resistance approximation. (a) Package/solder joint geometry. L is the package size (distance between solder joints), α i is the thermal expansion coefficient, and t is the solder joint gap. (b) Fatigue life versus total shear More
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003048
EISBN: 978-1-62708-200-6
..., are specific to these modern high-performance sealants. Stresses on a Joint The stresses on a joint may be resolved into shear stress and extension/compression stresses, which are caused by movement of the substrates due to thermal expansion and contraction; environmental forces, such as wind loads...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003405
EISBN: 978-1-62708-195-5
... the two basic methods, such as the trapped or fixed-volume rubber method and the variable-volume rubber method, of elastomeric tooling, which use the principles of thermal expansion molding. The significant properties and controlling equations that are required to characterize elastomeric tooling material...