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Published: 01 January 2002
is possible if a coated component is cut. When necessary, the cathodic component of a couple should be coated. (e) Ion transfer through a fluid can result in galvanic attack of less noble metals. In the example shown at left, copper ions from the copper heater coil could deposit on the aluminum stirrer More
Image
Published: 15 January 2021
deposit on the aluminum stirrer. A nonmetallic stirrer would be better. At right, the distance from a metal container to a heater coil should be increased to minimize ion transfer. (f) Wood treated with copper preservatives can be corrosive to certain nails. Aluminum cladding can also be at risk. (g More
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... treated with copper preservatives can be corrosive to certain nails. Aluminum cladding can also be at risk. (g) Contact of two metals through a fluid trap can be avoided by using a drain, collection tray, or a deflector. Where dissimilar materials are to be joined, it is advisable to use a more...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
.... The formation of rust spots could be prevented by covering bolts with a suspension of graphite in grease (Lox-Safe). It became apparent that the presence of aluminum accelerated the stress-corrosion cracking of the stainless. Aluminum is anodic to stainless in the galvanic series — it can be used...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001364
EISBN: 978-1-62708-215-0
... aluminum parts in centrifugal compressors have been well documented ( Ref 1 ). The reaction dissociates the refrigerant into carbon and hydrochloric and hydrofluoric acids, which consume aluminum. The reaction requires the presence of a film-free aluminum surface, which can result from either melting...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
..., copper ions from the copper heater coil could deposit on the aluminum stirrer. A nonmetallic stirrer would be better. At right, the distance from a metal container to a heater coil should be increased to minimize ion transfer. (f) Wood treated with copper preservatives can be corrosive to certain nails...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... dimples Brittle Failures Brittle failures do not show necking or elongation. The fracture surface can be transgranular/cleavage or intergranular, depending on the material and conditions ( Fig. 6 ). Fig. 6 (a) Brittle fracture of cast aluminum tensile bar. (b) Brittle fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003529
EISBN: 978-1-62708-180-1
... and Technology or the Collaborative Testing Service. Please note that the competent chemist can take advantage of this usually problematic differential solubility to gain additional information about some materials. For example, aluminum is often added to steel to create conditions conducive to maintaining...
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
... ( Fig. 1a , b ). Parabolic or elongated shear dimples occur from torsional loading ( Fig. 1c ) or from mode II (in-plane) shear. However, metallic materials can behave in a ductile manner but not exhibit the classical dimple-rupture morphology, as shown in Fig. 1(d) for a cast aluminum alloy...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001640
EISBN: 978-1-62708-235-8
... to the casting. The wide-head arrows show the ratchet marks—an indication here that the crack has started in multiple locations along the inside surface. Aluminum die castings can be rather brittle, and brittle castings can be very difficult fractography subjects, because their fatigue fracture surfaces...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001829
EISBN: 978-1-62708-241-9
... with that in the spalled area, the concentration of aluminum in the bond coat was also decreased to 2 to ~3 wt.% and that of tungsten was increased to 3 to ~5 wt.%. Based on these findings, the chemical composition of substrate as well as the spallation of top coat can affect diffusion, including the rate of aluminum...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001140
EISBN: 978-1-62708-227-3
... Abstract Several pressurized air containers (i.e., diving tanks) made of non-heat-treatable Al-5Mg aluminum alloy failed catastrophically. Catastrophic failure occurred when a subcritical stress corrosion crack reached a critical size. Critical crack size for unstable propagation was reached...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091350
EISBN: 978-1-62708-227-3
... Abstract Cracks occurred in a new ship hull after only three months in service. It was noted that the 5xxx series of aluminum alloys are often selected for weldability and are generally very resistant to corrosion. However, if the material has prolonged exposure at slightly elevated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... as low as 10% of those required for fast fracture in air ( Fig. 2 ) [ 12 – 14 ]. Fig. 1 Delayed-failure curve (time-to-failure versus applied stress as a percentage of the yield stress) for aluminium-alloy weld (5083) specimens exposed to liquid mercury at 20 °C. Note that failure can be almost...
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
... be electrically insulated from the stainless steel system to minimize galvanic corrosion [ 3 ]. The DI cooling water, the filtration, and the DI heating water should all be improved. The protective oxide layer on the 6063 aluminum that was formed in service can be seen in Figure 12 . Fig. 12 Uniform...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001783
EISBN: 978-1-62708-241-9
... Abstract An aluminum bronze bushing that serves as a guide in a crimping machine began to fail after 50,000 cycles or approximately two weeks of operation. Until then, typical run times had been on the order of months. Although the bushings are replaceable and relatively inexpensive, the cost...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... specific to the metal group and progress from melting to solidification, casting processing, and finally how the removal of the mold material can affect performance. aluminum casting defects castings copper ductile iron failure analysis gray iron melting solidification steel Introduction...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003556
EISBN: 978-1-62708-180-1
... the degradation of various protective systems, such as corrosion inhibitors and lubricants. The article describes the failure analysis of steel, iron, copper, aluminum, and their alloys. It also discusses the probes available to monitor conditions relevant to MIC in industrial systems and the sampling...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... Abstract This article presents a failure analysis of an aluminum cylinder head on an automotive engine. During an endurance test, a crack initiated from the interior wall of a hole in the center of the cylinder head, then propagated through the entire thickness of the component. Metallurgical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
..., and it has been demonstrated that cracking can be prevented by deoxidizing with titanium or zirconium or by combined titanium and aluminum ( Ref 18 ). Thermal Embrittlement of Maraging Steels Thermal embrittlement of maraging steels occurs when they have been heated above 1095 °C (2000 °F...