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Cadmium plating

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Published: 01 June 2019
Fig. 9 Small nicks or dents found under the cadmium plating (Cd) and paint (P) in the outside surface of the cylinder near the fracture origin. 1% Nital etch, ×500. More
Image
Published: 01 December 1993
Fig. 1 Heat-treated end frame component after cadmium plating. Several tiny cracklike indications, primarily in the base fillet radial zones, were detected by magnetic-particle testing. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
... to finger-tightness, and the consequent wrench torquing caused the actual fractures. The very small radius of the fillet between the bolt head and the shank undoubtedly accentuated the embrittling effect of the hydrogen. To prevent reoccurrence, the cleaning and cadmium-plating procedures were stipulated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0046057
EISBN: 978-1-62708-225-9
... Abstract After less than 30 days in service, several cadmium-plated retaining rings, made of 4140 steel tubing and heat treated to 36 to 40 HRC, broke during operation that included holding components of a segmented fitting in place under a constant load. Photographic and 100x nital-etched...
Image
Published: 01 June 2019
Fig. 1 Fracture surface (a) of failed cadmium-plated 1040 steel nose gear door bolt. The crack propagation pattern (arrow indicates the origin) and topography suggest both fatigue and corrosion. (b) Head of bolt showing cracking (arrow) that would lead to separation in a short time. 3x. (c More
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Published: 01 June 2019
Fig. 1 Cadmium-plated alloy steel self-retaining bolts that fractured because of hydrogen damage. (a) Fractured and unused intact bolt. (b) Fractured bolt; brittle fracture surface is indicated by A and B. (c) and (d) Electron fractographs of surfaces A and B, respectively, showing brittle More
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Published: 01 June 2019
Fig. 1 Retaining ring of cadmium-plated 4140 steel that failed by brittle fracture at a hard spot caused by an arc strike during plating. (a) View of retaining ring, and section showing location of arc strike. Dimensions given in inches. (b) Photograph of the retaining ring showing pit More
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Published: 01 June 2019
Fig. 1 Cadmium-plated AISI 8740 alloy steel fasteners that failed by hydrogen embrittlement. See also Fig. 2 . More
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Published: 01 June 2019
Fig. 1 Cadmium-plated 4340 steel ballast gas elbow assembly (a) with arrow showing hole where corrosion was found. (b) SEM of corrosion products on inside hole surface. 430x More
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Published: 01 June 2019
Fig. 1 Hydrogen-embrittlement fracture in a cadmium-plated 4140 steel forged accumulator ring. (a) Ring segment showing a fine crack (arrow). (b) Electron fractograph showing the predominantly intergranular fracture. 7800× More
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Published: 01 June 2019
Fig. 1 Cadmium-plated 8740 steel aircraft wing clamp that failed because of burning during forging. (a) View of assembled clamp and detail showing locations of fractures. Dimensions given in inches. (b) Fracture surfaces showing brittle, intergranular nature of fracture. Approximately 2×. (c More
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Published: 01 December 2019
Fig. 20 Macroscopic view of one of the intact cadmium-plated steel screws showing cadmium globules on the surface More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001102
EISBN: 978-1-62708-214-3
... of secondary cracks. 1.5×. Fig. 3 Closeup of stud 3 fracture face, covered with cadmium. 3.7×. Abstract Four cadmium-plated ASTM A193 grade B studs from a steam line connector associated with a power turbine failed unexpectedly in a nil-ductility manner. Fracture surfaces were covered...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006417
EISBN: 978-1-62708-234-1
... Abstract A cadmium-plated 4340 Ni-Cr-Mo steel ballast elbow assembly was submitted for failure analysis to determine the element or radical present in an oxidation product found inside the elbow assembly. Energy-dispersive x-ray analysis in the SEM showed that iron was the predominant species...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048634
EISBN: 978-1-62708-225-9
... Abstract During an inspection of a structure two weeks after assembly, the heads of several cadmium-plated AISI 8740 steel fasteners were found to be completely separated from their respective shanks. SEM examination of the fracture surfaces revealed a brittle, intergranular fracture mode...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001379
EISBN: 978-1-62708-215-0
...-existing quench cracks. Recommendations to prevent future failures include: ensuring that 100% magnetic particle inspections are conducted after bolts are tempered; using dull cadmium plate or an alternative to the electrode position process, such as vacuum cadmium plate or ion-plate or ion-plated aluminum...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048767
EISBN: 978-1-62708-235-8
... Abstract The clapper in a 250 mm diam disk valve (made from ASTM A36 steel, stress relieved and cadmium plated) fractured at the welded joint between the clapper and a 20 mm diam support rod (also made of same material). The valve contained a stream of gas consisting of 55% H2S, 39% CO2, 5% H2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048626
EISBN: 978-1-62708-225-9
... Abstract Cadmium-plated high-strength steel bolts were used to facilitate quick disassembly of a vehicle. One bolt was found fractured across the root of a thread after being torqued in place for one week. The bolts were made of 8735 steel heat treated to a tensile strength of 1241 to 1379 MPa...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047176
EISBN: 978-1-62708-235-8
... Abstract A ring clamp (8740 (AMS 6322), steel forged and cadmium plated) used for attaching ducts to an aircraft engine became loose after three hours of service. When the clamp was removed from the engine, the hinge tabs on one clamp half were found to be broken. Analysis (visual inspection...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048143
EISBN: 978-1-62708-235-8
... Abstract A cadmium-plated music-wire return spring that operated in a pneumatic cylinder designed for infinite life at a maximum stress level of 620 MPa failed after 240,000 cycles. An extremely hard and small kernel, which looked like a weld deposit, was observed at the center of the fractured...