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hard anodic process

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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
... and the anodized layer is not abraded. Failure analysis established that the composition was within specification, as were hardness and tensile properties. Fracture was intergranular; there was no evidence of grinding, burning, mechanical damage, or other microstructural conditions. The significant...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001820
EISBN: 978-1-62708-241-9
... and hardness for both steels are almost equals ( Tables 3 , 5 ) therefore the improved SSCC resistance of the A217-WC9 steel can be attributed to its higher pitting resistance. Comparison of the anodic polarization curves ( Fig. 9 ) shows a considerable improvement in pitting resistance as a result...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
...Specification and requirements for wheel studs Table 1 Specification and requirements for wheel studs Specification Ultimate tensile strength (a) Yield strength (a) Elongation (a) , % Hardness, HRC Chemistry MPa ksi MPa ksi Core Surface SAE Standard J429, Spec. Grade 8...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001064
EISBN: 978-1-62708-214-3
... of hydrotest water Table 2 Composition of hydrotest water Parameter Measured values Acceptable levels (U.S.) (a) ph 7.3 6.5–8.5 Chloride 1260 ppm 250 mg/L Sulfur 160 ppm 250 mg/L Nitrate 40 ppm 10.0 (as N) Bicarbonate 350 ppm as CaCO 3 … Calcium hardness 390 ppm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c0091394
EISBN: 978-1-62708-227-3
... and spatter are present, comprise a relatively massive cathode with a small anodic pit. Pitting starts and acid collects in the tiny pores of the damaged weld, and the process of accelerated pitting results. The pits tend to be long, thin, and capillarylike, routed in a path though the weld or HAZ, just...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... not participate in the electrochemical reaction. When viewed from the standpoint of partial processes of oxidation and reduction, all corrosion can be classified into a few generalized reactions. The anodic reaction in every corrosion reaction is the oxidation of a metal to its ion. This can be written...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... in the electrochemical reaction. When viewed from the standpoint of partial processes of oxidation and reduction, all corrosion can be classified into a few generalized reactions. The anodic reaction in every corrosion reaction is the oxidation of a metal to its ion. This can be written in the general form: (Eq 5...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001824
EISBN: 978-1-62708-241-9
... anode and large cathode) aggravated the corrosion process [ 1 , 2 , 6 ]. The corrosion was accelerated by the presence of high level of chloride ions in addition to the action of H 2 S, CO 2 , and oxygen at high working temperature of 82 °C. The elemental sulfur that was detected by x-ray...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... of the broken parts showed that the microstructure, the hardness, and the chemical composition of the Al-alloy were within the specification, but some of the cracked parts were manufactured using a different material than that specified. Crack propagation Fracture toughness Stretch zone WL 3.1645...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001796
EISBN: 978-1-62708-241-9
... microstructure ( Fig. 4b ) which exhibited larger amounts of primary carbides. Both structures were consistent with the properly processed M50NiL and M50 bearing materials. Surface hardness of the carburized M50NiL inner ring material measured 64 HRC with the core measuring 46 HRC both of which met...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001486
EISBN: 978-1-62708-234-1
..., there are aspects that lend support to the corrosion hypothesis. It is considered that the impact forces may only serve to remove the protective oxide film normally present on the surface, and that the hare regions thus produced become anodic to the remainder and local corrosion cells are set up, the anodic regions...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
... Abstract Hydrogen damage is a term used to designate a number of processes in metals by which the load-carrying capacity of the metal is reduced due to the presence of hydrogen. This article introduces the general forms of hydrogen damage and provides an overview of the different types...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001560
EISBN: 978-1-62708-217-4
... oxidized and pitted. The breech chambers are constructed from AISI 4340 steel heat treated to a specified hardness value of Rockwell C 40–45. Metallurgical failure analyses on several failed breech chambers conducted at the University of Oklahoma, have identified stress corrosion cracking as a probable...
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
... surfaces to form a new compound. This new compound forms a solid protective coating that fills the asperities on the exposed metal. Certain surface treatments can also be used to reduce adhesive wear between materials. Hard anodizing (electron beam surface melting process) is a one such treatment...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... hydrogen-induced blistering internal hydrogen internal reversible hydrogen embrittlement nickel-base alloys refractory metals stainless steels susceptibility titanium titanium alloys transition metals HYDROGEN DAMAGE is a term used to designate a number of processes in metals by which...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006794
EISBN: 978-1-62708-295-2
... conditions ( Fig. 1a ), automobile brakes subject to wet conditions or in relatively aggressive environments such as saline water due to deicing salts and dirt ( Fig. 1b ), and ore chutes in mineral-processing plants, where moist ore particles slide on an inclined platform and chute. Note that the example...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048791
EISBN: 978-1-62708-234-1
... were located in wide bands running circumferentially below the cross-to-cap weld and above the cap-to-discharge-pipe weld. The material was found to conform to the requirements both in terms of hardness and strength. Intergranular cracks filled with oxide were observed on metallographic analysis...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003567
EISBN: 978-1-62708-180-1
... WEAR is defined as the degradation of materials in which both corrosion and wear mechanisms are involved. The combined effects of wear and corrosion can result in total material losses that are much greater than the additive effects of each process taken alone, which indicates synergism between the two...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001395
EISBN: 978-1-62708-220-4
... that the sensitisation of the head material was caused by the strain hardening introduced during the cold spinning process, thus contributing to the effect, either by the formation of anodic regions or, by facilitating the formation of chromium carbides. A cold worked structure is unstable and when activated...
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
... there are three compositionally different phases within the material: ferrite, pearlite, and graphite. The corrosion process will initiate as uniform corrosion with the formation of an electrolytic microcell between the graphite cathode and ferrite or pearlite anode ( Ref 9 , 10 ). The process can turn...