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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.aero.c9001546
EISBN: 978-1-62708-217-4
... 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 around the intersection of the S/N curves for the adhesive and the base material. Blistering of a Chemically...
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
... 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. It was indicated...
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
... 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 braze metal...
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
... of specimens taken from similar components was at the silver/silver bond interface. Laboratory testing revealed that the uranium/silver joint was susceptible to premature failure by stress-corrosion cracking under sustained loading if the atmosphere was saturated with water vapor. Selected Reference...
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
.... Fig. 2 Sample showing cracking in and around the peripheral tubes, as well as in the area of the floating tube sheet. Fig. 3 Corroded hole through the wall the tube core. Fig. 4 Microstructure showing end-grain corrosion in the explosively bonded outer E-Brite layer. Fig...
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
..., or adequately, covered with filler metal and bonded can result from any one or more causes including: Unsatisfactory cleaning during braze joint preparation, which prevents good flow of the filler metal by reducing the wettability of the joint surfaces Insufficient or nonuniform heat, which produces...
Image
Published: 01 June 2019
Fig. 1 Type 347 stainless steel pressure-probe housing that failed by fatigue fracture because of voids in a brazed joint. (a) Photograph of opening produced in housing by detachment of a segment at time of fracture. 5 1 4 ├Ś. Large region indicated by arrows is devoid of braze metal More
Image
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
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
... operations. Precise machining of the cured convergent insulator and matching nozzle shell insures a good 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...
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
... joint manufacturing process and in field-use applications. The corresponding failure mechanism and root-cause analysis are also presented; the analysis method and practical examples of soldering failures are included. Characteristics Solder is a fusible metal alloy used to create a permanent bond...
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: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... little bead-to-substrate bonding. Medical prostheses used to replace joints in the human body are frequently manufactured as cobalt-chromium-molybdenum alloy investment castings in accordance with ASTM F-75. Table 1 gives the chemical composition requirements of ASTM F-75. Many prostheties...
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
.... The first failure occurred after 112 days of service. Replacement pipe failed 2 days later. Surface examination of the failed tubing indicated that fracture initiated at the outside surface. Metallographic analysis showed that the fracture originated in the upturned fibers adjacent to the ERW bond line...
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
... temperature window in which to perform the welding ( Ref 5 ). In this temperature window and joint configuration, there is little expulsion of material from the bond line, and the mating surfaces are susceptible to the formation of oxide inclusions, which become entrapped along the bond line. These oxides can...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001691
EISBN: 978-1-62708-234-1
.... The 3003 aluminum was severely pitted far from the stainless steel joint regions ( Fig. 10 ). Fig. 10 An aluminum-to-stainless-steel roll-bond transition showing pits in the 3003 aluminum. The best solution concerning pitting is to avoid the use of materials that show any tendency towards...
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
... was acquired and subjected to hardness, 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...
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
... to remove impurities and casting defects. The U-bent pipe is casted by gravity method and its inner surface also machined. 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001211
EISBN: 978-1-62708-235-8
... particularly favorable conditions for corrosion in the defective welded seam (crevice corrosion). The tube material itself is perfectly satisfactory and in no way responsible for the failure. Pipe Weld defects Welded joints Welded steel Joining-related failures Crevice corrosion The elbow made...
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
... the expansion of the termination, rupturing the nickel barrier and giving the solder joint a cracked appearance Fig. 10 Consistent gross delamination in the group 3 samples, those that had been soldered to the carrier plate. Measurable separation was noted at the metallization interface. 124...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046991
EISBN: 978-1-62708-234-1
... the conclusions that the deep oxidation greatly decreased the strength of the weld HAZ and cracking followed. Carbides Piping Precipitation Sensitization Welded joints Incoloy 800 UNS N08800 Intergranular fracture The outlet-piping system of a steam-reformer unit failed by extensive cracking...