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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... Abstract The circumstances surrounding the in-service failure of a cast Ni-base superalloy (Alloy 713LC) second stage turbine blade and a cast and coated Co-base superalloy (MAR-M302) first stage air-cooled vane in two turbine engines used for marine application are described. An overview...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001673
EISBN: 978-1-62708-227-3
... and copper reprecipitation. Heat exchanger tubes Marine environments Sulfides 90Cu-10Ni Intergranular corrosion The failure of a heat exchanger tube in a marine engine resulted in flooding of the vessel and subsequently sinking it. The coolant utilized in this engine was nonrecirculated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001792
EISBN: 978-1-62708-241-9
... stress concentration increases with increasing sharpness in the geometrical discontinuity. In the marine engine evaluated in this study, the gearbox shaft and clutch shaft are located in the gear box unit. Gearbox shaft transmits power from gearbox to propeller shaft, while clutch shaft helps...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001621
EISBN: 978-1-62708-227-3
... Abstract A crankshaft flange from a marine diesel engine illustrated a less-common case of fretting-fatigue cracking. The crankshaft was from a main engine of a sea-going passenger/vehicle ferry. The afterface of the flange was bolted to the flange of a shaft driving the gearbox. Cracks...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001790
EISBN: 978-1-62708-241-9
... Abstract The failure of a high-speed pinion shaft from a marine diesel engine was investigated. The shaft, which had been in service for more than 30 years, failed shortly after the bearings were replaced. Examination of the shaft revealed cyclic fatigue, with a substantial distribution...
Image
Published: 15 January 2021
Fig. 31 Different views of possible calcium-magnesium-alumino-silicate attack on a shipboard turbine blade under the platform in a marine gas turbine engine. Source: Ref 235 . Courtesy of U.S. Navy More
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
... couples formed between precipitates and the alloy matrix, leading to severe intergranular attack. No recommendations were made. Marine environments Sensitization Ship hulls 5083 UNS A95083 Intergranular corrosion The 5 xxx series of aluminum alloys are often selected for weldability...
Image
Published: 15 January 2021
Fig. 22 Schematic diagram of shipboard engine corrosion rates of type I and type II hot corrosion versus temperature in a marine environment compared with the Arrhenius oxidation rate versus temperature. LTHC, low-temperature hot corrosion; HTHC, high-temperature hot corrosion. Courtesy of U.S More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
...-generation plants (coal, oil, natural gas, and nuclear), pulp and paper mills, waste-incineration sites, numerous industrial chemical processes, diesel engines (power, land vehicle, and maritime), and gas turbine (land-based, marine shipboard, and aircraft). Predicting corrosion of metals and alloys...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001417
EISBN: 978-1-62708-227-3
..., depending on their shape and location. This case study describes a failure where defects of this nature were considered to have played a predominant role. The engine concerned was a marine diesel running at 350 r.p.m. and had satisfactorily completed 13,000 hours before failure of one of the piston pins...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001171
EISBN: 978-1-62708-219-8
... Abstract The defects observed along weldings of stainless steel pipelines employed in marine environments were evidenced by metallographic and electrochemical examination. A compilation of cases on the effect of defective weldings, in addition to improper choice of stainless steel for water...
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 combined effect of biodegradation and emulsification can compromise the performance of lubricants, leading to failure of metal components ( Ref 55 ). A case study involving the failure of bearings in a marine engine is given in Ref 56 . Commercial kits are available to track microbial growth in lubricants...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001684
EISBN: 978-1-62708-225-9
... of penetration was consistent with dezincification rates reported in the literature for such brasses in salt water if the valve had been in service about 55 years. Dezincification Marine environments Tug boats Valve seats Alpha brass Alpha-beta brass Dealloying/selective leaching Introduction...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
... propagated by stress-corrosion cracking. The cause of cracking was twofold: use of interference-fit fasteners exposed to moisture intrusion from a marine environment and poor hole quality. Failure was intensified by dissimilar-metal contact in the presence of weak acidic electrolyte (dissociated MoS2...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001103
EISBN: 978-1-62708-214-3
... content and at least the same yield strength. Steps to exclude seawater and any possible source of ammonia from the bolt shank were also suggested. Marine environments Aluminum bronze Intergranular fracture Stress-corrosion cracking Background An aluminum bronze propeller tap bolt from...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006866
EISBN: 978-1-62708-395-9
... that steadily accumulate in the environment, especially in marine habitats ( Ref 1 , 2 ). In an area of marine debris in the North Pacific Ocean known as the great Pacific garbage patch, more than 1.8 trillion pieces of plastic with an estimated weight of 80,000 tons have so far accumulated, with no end...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... propulsion and the generation of electricity (marine gas turbines) [ 1 ]. The corrosion issues for industrial gas turbines are similar for all applications and depend more on the quality of the fuel and air used in the engine than on the specific industrial application. In the combustor and turbine...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001455
EISBN: 978-1-62708-234-1
...-1Zn alloy, was effective in halting and preventing this form of attack. While alarming, the appearance of exfoliation corrosion provides a valuable warning to the engineer or inspector before a severe weakening of the particular sections has occurred. Aging (artificial) Bars Extrusions...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001761
EISBN: 978-1-62708-241-9
... accurate crankshaft deviation . Diesel Gas Turbine Worldwide 19 ( 3 ), 30 – 32 ( 1987 ). 3. Haddara M.R. , Younis M.A. : Effect of connecting rod obliquity on the torsional vibration of marine diesel engines with variable inertia . Trans. Canadian Soc. Mech. Eng. 10 ( 4 ), 201...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... in causing hot corrosion ( Ref 29 , 30 ). Chloride salts can act as a fluxing agent and dissolve protective oxide films. Air in a marine environment ingested into the combustion zone of any marine gas turbine engine is laden with chlorides, unless properly filtered. Sodium chloride has been viewed...