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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c0046956
EISBN: 978-1-62708-232-7
... Abstract A brazing-furnace muffle 34 cm (13 in.) wide, 26 cm (10 in.) high, and 198 cm (78 in.) long, was fabricated from nickel-base high-temperature alloy sheet and installed in a gas-fired furnace used for copper brazing of various assemblies. The operating temperature of the muffle...
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Published: 01 June 2019
Fig. 2 Photo-micrograph of preferential attack on brazing alloy. (×100). More
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Published: 01 June 2019
Fig. 17 Showing crack origin associated with brazing metal. More
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Published: 01 June 2019
Fig. 18 Unetched. Intercrystalline cracking adjacent to brazing (× 200). More
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Published: 01 June 2019
Fig. 19 Intercrystalline cracking adjacent to brazing. (× 200) More
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
... Abstract The various methods of furnace, torch, induction, resistance, dip, and laser brazing are used to produce a wide range of highly reliable brazed assemblies. However, imperfections that can lead to braze failure may result if proper attention is not paid to the physical properties...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001439
EISBN: 978-1-62708-235-8
... Abstract Persistent leakage was experienced from copper tube heaters which formed part of dairy equipment. Metallurgical examination of the brazed joints showed them to have suffered a preferential corrosion attack. This resulted in the phosphide phase of the brazing alloy being corroded away...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047745
EISBN: 978-1-62708-235-8
... Abstract A 321 stainless steel radar coolant-system assembly fabricated by torch brazing with AWS type 3A flux, failed at the brazed joint when subjected to mild handling before installation, after being stored for about two years. It was revealed by visual examination of the failed braze...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047753
EISBN: 978-1-62708-235-8
... Abstract A pressure probe assembly comprised of type 347 stainless steel housing, brazed with AMS 4772D filler metal to the pressure probe, failed due to detachment of a rectangular segment from the housing. The presence of a large brazing metal devoid region in the pressure probe-housing joint...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001193
EISBN: 978-1-62708-229-7
... Abstract When a steam turbine was put out of service, cracks were noticed on many of the blades in the low pressure section round the stabilization bolts and perpendicular to the blade axis. The blades were made from chrome alloy steel X20-Cr13 (Material No. 1.402). When the bolts were brazed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006440
EISBN: 978-1-62708-234-1
... Abstract A failed laser mirror and another complete mirror of the same construction were analyzed. The laser mirror consisted of three layers of material brazed together to form channels through which the cooling water flows. Samples were analyzed with light optical and scanning electron...
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Published: 01 June 2019
Fig. 1 Section through brazed header assembly showing location of cracking. More
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Published: 01 June 2019
Fig. 25 Failure of bars of a.c. Motor at brazed ends. More
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Published: 01 June 2019
Fig. 4 a. Microstructure in the vicinity of the brazed zone, cross section. 200× Etched with sodium picrate. b. Microstructure in the vicinity of the brazed zone, cross section. 200× Etched as in Fig. 3 . 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
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Published: 30 August 2021
Fig. 5 Copper tubing braze joint cracking. (a) Carbon steel fitting end of the tube showing the fracture surface and a silver-colored drip mark on the tube. Original magnification: 10×. (b) Fine cracks observed in the tube associated with the drip mark. Original magnification: 20×. (c More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047756
EISBN: 978-1-62708-235-8
... Abstract Waspaloy (AMS 5586) fabricated inner ring of a spray-manifold assembly failed transversely through the manifold tubing at the edge of the tube and support sleeve brazed joint. The assembly was brazed with AWS BAu-4 filler metal (AMS 4787). Fatigue beach marks propagating from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047749
EISBN: 978-1-62708-235-8
... Abstract A type 321 stainless steel (AMS 5570) pressure-tube assembly that contained a brazed reinforcing liner leaked during a pressure test. Fluorescent liquid-penetrant inspection revealed a circumferential crack extended approximately 180 deg around the tube parallel to the fillet...
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Published: 01 June 2019
Fig. 1 Segments of a type 321 stainless steel radar coolant-system assembly that broke at a brazed joint between a bellows and a cup because of inadequate bonding between the brazing alloy and the stainless steel. (a) Portions of the broken coolant-system assembly; bellows is at A, cup at B More
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Published: 30 August 2021
Fig. 1 Segments of a type 321 stainless steel radar coolant-system assembly that broke at a brazed joint between a bellows and a cup because of inadequate bonding between the brazing alloy and the stainless steel. (a) Portions of the broken coolant-system assembly; bellows is at A, cup at B More