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high-strength casting alloys

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Published: 01 June 2019
Fig. 1 Fracture surface of cast 10-cm (4-in.) high-strength low-alloy steel chain link that failed because of internal hydrogen-assisted cracking. Note hydrogen flake. 0.25× More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0047474
EISBN: 978-1-62708-221-1
... fracture surface ( Fig. 1 ). Fig. 1 Fracture surface of cast 10-cm (4-in.) high-strength low-alloy steel chain link that failed because of internal hydrogen-assisted cracking. Note hydrogen flake. 0.25× Conclusions The failure of this link was caused by an excessive hydrogen content given...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... Abstract A femoral knee implant was returned to the casting vendor for analysis after exhibiting poor bond strength between the cast substrate and a sintered porous coating. Both the coating and the substrate were manufactured from a cobalt-chromium-molybdenum alloy. Metallographic analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047428
EISBN: 978-1-62708-235-8
... Abstract A cast dragline bucket tooth failed by fracturing after a short time in service. The tooth was made of medium-carbon low-alloy steel heat treated to a hardness of 555 HRB. The fracture surface was covered with chevron marks. These converged at several sites on the surface of the tooth...
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
... and decarburization. Both of these definitions apply equally well to a casting or a weldment. Proper selection of casting process, alloy selection, part and mold design, solidification control, and grain refinement minimize hot cracking problems. Hot strength (resistance to cracking at solidification temperature...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... method is to increase the thermal gradient (often accomplished by increasing the solidification rate), which decreases the length of the mushy zone. This technique can be limited by alloy and mold thermal properties and by casting geometry, that is, the design of the casting. The fatigue strength...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0047479
EISBN: 978-1-62708-221-1
... was cast in ultrahigh-strength low-alloy steel that had been heat treated to a hardness of 555 HB. Fig. 1 Ultrahigh-strength steel dragline bucket tooth that failed due to environmental hydrogen-assisted cracking. See also Fig. 2 . Investigation Chevron marks on the fracture surface led...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001543
EISBN: 978-1-62708-218-1
... to 500 F, and must withstand explosive loads which can exceed 1,000 psi. Because light weight is needed, virtually all such pistons are cast aluminum. The preferred alloy is 357 aluminum, which contains 6.5 to 7.5 Si and 0.45 to 0.60 Mg. Tensile strength is 45,000 to 52,000 psi in solution treated, aged...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090971
EISBN: 978-1-62708-222-8
... Abstract A die-cast zinc adapter used in a snowthrower failed catastrophically in a brittle overload manner. The component had a chemical composition similar to standard zinc alloy ZA-27 (UNS Z35840), although the iron content was much higher and the copper slightly lower. The mechanical...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047423
EISBN: 978-1-62708-236-5
... not been used to make the weld. Repair welds in high-strength steel castings should always be made with low-hydrogen filler materials. Filler metals Heat affected zone Repair welding Fe-0.18C-1.37Ni-0.42Cr-0.31Mo Fatigue fracture Joining-related failures A large shackle used in operating...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001099
EISBN: 978-1-62708-214-3
... Abstract Uncoated high-strength alloy steel cap screws retaining a cast aluminum (356.0) diffuser assembly in a centrifugal refrigerant compressor failed in a brittle manner a short time after the system was placed in operation. Evidence obtained during the failure analysis indicated...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001303
EISBN: 978-1-62708-215-0
... of gross overload. Use of an alloy with a much higher yield strength and improvement in design were recommended. Chain drives Cracking Motor vehicles Sand castings UNS A14130 A413.0 LM6M (Other, general, or unspecified) fracture Background A sprocket drive wheel in a tracked all...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0089572
EISBN: 978-1-62708-218-1
... Abstract Two sand-cast low-alloy steel equalizer beams (ASTM A 148, grade 105-85) designed to distribute the load to the axles of a highway truck broke after an unreported length of service. Normal service life would have been about 805,000 km (500,000 mi) of truck operation. Investigation...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001809
EISBN: 978-1-62708-241-9
... is typically between C95200 and C95900. Because of the high aluminum content, NAB alloys generally have very high corrosion resistance in seawater, chlorides, and dilute acids. Additional corrosion resistance is obtained with the use of nickel, which also increases the alloy’s yield strength. The addition...
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
... by hardness check or destructive testing, chemical analysis • Loading direction may show failure was secondary • Short-term, high-temperature, high-stress rupture has ductile appearance (see creep) • Load exceeded the dynamic strength of the part • Check for proper alloy and processing as well as proper...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... was secondary• Short-term, high-temperature, high-stress rupture has ductile appearance (see creep) • Load exceeded the dynamic strength of the part• Check for proper alloy and processing as well as proper toughness, grain size• Loading direction may show failure was secondary or impact induced• Low...
Image
Published: 01 January 2002
Fig. 19 Quantitative correlation between the ultimate tensile strength and the area percentage of voids on the corresponding fracture surfaces of high-pressure die-cast AM60 magnesium alloy specimens having the same dendrite arm spacing. Source: Ref 3 More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001266
EISBN: 978-1-62708-215-0
... of Other Parts in Same or Similar Service The substitution of cast stainless steel for the traditional wrought stainless steel or cast cobalt-chromium alloy in this application caused a dramatic reduction in strength and an attendant increase in the likelihood of mechanical failure. Cast stainless...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0047220
EISBN: 978-1-62708-220-4
... (1600 °F), and oil quenched. The larger gear was tempered to 200 to 240 HB, and the smaller gear to 240 to 280 HB. These hardness levels provided the desired resistance to shock and wear yet retained high strength and good ductility. No further gear failures occurred. Casting Design The shape...