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bonded joints

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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
... braze that the filler metal had not covered all mating surfaces. Lack of a metallurgical bond between the brazing alloy and stainless steel and instead mechanical bonding of the filler metal to an oxide layer on the stainless steel surface was revealed by examination of the broken joint at the cup...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... stress at the bond. The failures appeared to be predominantly located between the silver layer and the uranium substrate. Normal fracture location of specimens taken from similar components was at the silver/silver bond interface. Laboratory testing revealed that the uranium/silver joint was susceptible...
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
...-housing joint was revealed by visual examination. Fatigue marks, emanating from multiple crack origins on the inside surface of the housing at the brazed joint were revealed by further study of the fracture. A poor metallurgical bond was confirmed by the presence of large irregular voids, flux trapped...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001047
EISBN: 978-1-62708-214-3
...Abstract Abstract An E-Brite /Ferralium explosively bonded tube sheet in a nitric acid condenser was removed from service because of corrosion. Visual and metallographic examination of tube sheet samples revealed severe cracking in the heat-affected zone between the outer tubes and the weld...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001546
EISBN: 978-1-62708-217-4
.... In several of these samples fatigue cracks were initiated at the bases of pits, the propagation of which led to ultimate failure of the test piece ( Fig. 2 ). Metallographic examination of these samples revealed no cracking in the bonded joint. It was interesting to note that the dual failures occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... bond. Precise bond control was felt necessary to avoid space that might gather pressure. However, several nozzles made this way had bond joint separations as much as 0.080 inches. As a result additional changes were made to the manufacturing techniques. The final configuration which failed during...
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
... flux, improper application of excess flux, nonuniform heat control resulting in localized underheating or overheating, and loose joint fit-up. Brazing operations in which the braze joint surfaces are not completely, or adequately, covered with filler metal and bonded can result from any one or more...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... M.J. , “ Joint Efficiency Factors for A.O. Smith Line Pipe ,” a Kiefner white paper, Dec 2012 10. Yurioka N. and Suzuki H. , Hydrogen Assisted Cracking in C-Mn and Low Alloy Steel Weldments , Int. Mater. Rev. , Vol 35 (No. 1 ), 1990 , p 217 – 249 10.1179/imr...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006827
EISBN: 978-1-62708-329-4
... essential for the formation of a metallurgical bond between the solder and the workpiece, good wetting helps the solder material fill joint gaps (or plated through-holes in the context of a PCB). Wetting depends on several factors, including but not limited to the surface tension/surface energy of joint...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001116
EISBN: 978-1-62708-214-3
... initiated at the outside surface. Metallographic analysis showed that the fracture originated in the upturned fibers adjacent to the ERW bond line. Cross sections of the weld were removed from three random locations in the test sample. At each location, the up turned fibers of the weld zone contained bands...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006821
EISBN: 978-1-62708-329-4
... as well as fatigue of the rivets. During manufacturing, difficulties with the cold-bond adhesive led to the random appearance of bonds with degraded adhesion and some areas that did not bond at all. This left the lap joint susceptible to corrosion, which led to further degradation of the adhesive bond...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006813
EISBN: 978-1-62708-329-4
... made with well-formed fillets ( Fig. 15b ), the fin-tube bonds may feature pathological joints, leading to mechanical and thermal deficiencies. A joint may not be formed ( Fig. 15c ), may be excessively eroded due to substrate dissolution ( Fig. 15d ), or may be hardly formed ( Fig. 15e ). Substrate...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... required FTIR analysis. By determining the nature of the layer via FTIR, the source for failure was indicated as both material and process related. In other words, the resistor termination design, because it incorporated polymeric materials and thus limited metallurgical bonding, was not appropriate...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001785
EISBN: 978-1-62708-241-9
..., chemistry, SEM, and metallurgical analyses. SEM imaging revealed microvoid coalescence within the fracture zone. The microvoids were flat and smooth edged indicating insufficient bonding. In addition, a cross sectional sample, mounted and etched using alkaline chromate, revealed an oxygen-rich zone...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047720
EISBN: 978-1-62708-217-4
.... The weldments were finally secured to the bases of the turbine blades by a brazing operation. One of the laser beam attachment welds broke after a 28-h engine test run. Exposure of the fracture surface for study under the electron microscope revealed the joint had broken in stress rupture. Failure was caused...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
... articulating surface (polyethylene is transparent to x-rays, see Fig. 1 ). Also present in the tibial tray is a U-shaped notch. This recess is needed to preserve the posterior cruciate ligament of the knee in order to maintain stability of the joint and minimize the changes in anatomy required...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
...Abstract Abstract A femoral knee implant was returned to the casting vendor for analysis after exhibiting poor bond strength between the cast substrate and a sintered porous coating. Both the coating and the substrate were manufactured from a cobalt-chromium-molybdenum alloy. Metallographic...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... precise control of environment, heat input, and high-resolution instrument. IR systems are sensitive to surface emissivity. Rapid examination of large areas. Can be adapted to production inspections Circuit board solder joints, solar cells, heat-transfer equipment, metals, composites, concrete Sonic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001714
EISBN: 978-1-62708-232-7
.... Most of the pipes are welded in a manufacturing shop. Only the special joint, called J-2 Joint, are welded on site. Some welding protrusion occurs in the J-2 joints. Composition of C and D vertical pipes is given in Table 2 . Typical composition of HK 40 alloy of C and D pipes Table 2...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... is that properties are a function of structure and structure is a function of processing. At the atomic structure level, individual atoms exhibit differences in the number of electrons in the various electron shells, resulting in different types of bonding and bond strength. Bonding can be covalent (strong...