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electroplating

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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
... surface. The kernel was assumed to have resulted from extreme localized overheating. These springs were reported to have been barrel electroplated after fabrication. The intermittent contact with the dangler (suspended cathode contact) as the barrel rotated allowed high local currents when the last...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0048674
EISBN: 978-1-62708-222-8
... to clamp onto the framework prior to springback. The heat treatment cycle of the fasteners consisted of austenitizing, quenching, tempering to obtain a tempered martensite microstructure, acid cleaning, zinc electroplating, coating with a clear dichromate and thereafter baking to remove the nascent...
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
..., all would have failed within two weeks. The bolts were baked, as specified by ASTM B 242, at 205 deg C (400 deg F) for 30 min. No further failures occurred. Baking for 30 min is the minimum baking time; however, baking times up to 24 h are recommended for greater safety. Electroplating Hydrogen...
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Published: 01 January 2002
Fig. 24 Zinc-electroplated 1060 steel fastener that failed by hydrogen embrittlement. The part was used to secure fabric to lawn-furniture framework. Dimensions given in inches More
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Published: 01 January 2002
Fig. 22 Two views of a notched specimen that was electroplated with copper, wrapped with copper wire, and tested for 3 h at 1100 °C (2010 °F) without application of a load. No grain-boundary penetration of copper or intergranular cracking is evident, but there is evidence of minor bulk More
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Published: 30 August 2021
Fig. 24 Zinc-electroplated 1060 steel fastener that failed by hydrogen embrittlement. The part was used to secure fabric to lawn furniture framework. Dimensions given in inches More
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Published: 01 June 2019
Fig. 1 Zinc-electroplated 1060 steel fastener that failed by hydrogen embrittlement. The part was used to secure fabric to lawn-furniture framework. Dimensions given in inches More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001613
EISBN: 978-1-62708-235-8
... Abstract The electroplated tappet adjusting screws used in diesel engines failed during initial bend testing. The analysis of the failure showed that the fracture was nucleated from the subsurface of the screw. The fracture surface was intergranular at the ID and OD region and microvoid...
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
..., indicating hydrogen embrittlement. An investigation was conducted to determine the extent of hydrogen embrittlement in the various lots of cadmium-plated 8740 steel fasteners. It was found that hydrogen embrittlement was caused by the use of a bright, impervious cadmium electroplate that hindered diffusion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091036
EISBN: 978-1-62708-227-3
..., and prior hydrogen charging that occurred during manufacturing. The probable source of charging was the electroplating, although postplating baking was reportedly performed as well. Recommendations included examining the manufacturing process in detail. Cap screws Electroplating Intergranular...
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
... Abstract Two clevis-head self-retaining bolts used in the throttle-control linkage of a naval aircraft failed on the aircraft assembly line. Specifications required the bolts to be heat treated to a hardness of 39 to 45 HRC, followed by cleaning, cadmium electroplating, and baking to minimize...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001185
EISBN: 978-1-62708-228-0
... temperature, and electroplated with cadmium for protection against corrosion. Each fracture showed seven or eight kidney-shaped cracks. At the origins of these cracks on the concave inner surface of the springs, crater-like depressions and beads of melted and resolidified material were found. Fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
... minimized. Die castings Electroplating Porosity Shrinkage Surface defects Zinc Casting-related failures Near-surface porosity in zinc die castings that were subsequently plated with copper, nickel, and bright chromium was causing blemishes in the plating. The platers had already performed...
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Published: 01 June 2019
Fig. 1 A classical “gas” pore in a zinc die casting. It has been opened to the surface of the part by the buffing operation performed prior to electroplating. More
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Published: 01 January 2002
Fig. 12 Cadmium-plated 8740 steel aircraft-wing assembly nut that failed by hydrogen embrittlement. The nut was not baked after electroplating to release hydrogen. (a) Overall view. 5×. (b) Fracture surface. 9×. (c) Scanning electron micrograph of typical intergranular fracture shown in box More
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Published: 30 August 2021
Fig. 12 Cadmium-plated 8740 steel aircraft-wing assembly nut that failed by hydrogen embrittlement. The nut was not baked after electroplating to release hydrogen. (a) Overall view. Original magnification: 5×. (b) Fracture surface. Original magnification: 9×. (c) Scanning electron micrograph More
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Published: 01 December 1993
was actually resin separation from the epoxy binder in the thick-film ink. The following features can be discerned: area 1 is the alumina substrate; area 2 is the cermet metallization; area 3 is the thick-film polymer ink; area 4 is the electroplated nickel barrier; and area 5 is the lead-tin surface alloy More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006448
EISBN: 978-1-62708-217-4
... to ensure that a source of hydrogen is not introduced during the plating operation. Electroplating Martensitic stainless steels Nondestructive testing 440C UNS S44004 Stress-corrosion cracking Pitting corrosion Hydrogen damage and embrittlement Three wing flap hinge bearings were received...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001291
EISBN: 978-1-62708-215-0
... examination. Arrow indicates region that was hard chromium plated. Wheel axle is at lower end. Testing Procedure and Results Nondestructive Evaluation Dye Penetrant Inspection Dye penetrant inspection of the electroplated hard chromium band revealed cracking with a distinct helically banded...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4