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age-hardenable alloys

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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
... vehicle failed at Cape Kennedy ( Fig. 2 ). They were made of 17-4 PH in the H900 condition — a martensitic, age-hardening alloy. In the H900 condition (solution treated and aged 1 hr at 900 F), the material had nominal strengths of 180,000 psi yield and 200,000 psi tensile. The alloy's composition: 0.07 C...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046966
EISBN: 978-1-62708-229-7
... to age hardening, subsurface oxidation related to intragranular carbides, and high residual tensile macrostresses. No further conclusions could be drawn because of the lack of detailed service history, and no recommendations were made. Airfoils Carbides Precipitation Turbines Vanes AMS 5382...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001590
EISBN: 978-1-62708-228-0
.... Available Materials and Post Fabrication Heat Treatments Alloys containing the age hardening elements (Al, Ti, Nb plus C) are susceptible to stress relation cracking when placed in service with the age hardening temperature range. The propensity to develop stress relaxation cracking increases...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001753
EISBN: 978-1-62708-241-9
... for hardness testing was also prepared for metallographic inspection. Figure 7 is a micrograph of the casting which demonstrates a dendritic microstructure within grains, as well as the presence of shrinkage voids. As an age-hardenable aluminum alloy, the aluminum matrix will have precipitated intermetallic...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001346
EISBN: 978-1-62708-215-0
... intergranularly from both the flue gas and steam sides. Enhanced general and grain boundary oxidation coupled with age hardening of the alloy led to the formation of incipient intergranular cracks that acted as sites for the initiation of the fatigue cracks. References References 1. Orr J...
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
... • Multiple intergranular cracks • Voids formed on grain boundaries or wedge-shaped cracks at grain triple points • Reaction scales or internal precipitation • Some cold flow in last stages of failure Contributing factors • Load exceeded the strength of the part • Check for proper alloy and processing...
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
... triple points• Reaction scales or internal precipitation• Some cold flow in last stages of failure Contributing factors • Load exceeded the strength of the part• Check for proper alloy and processing by hardness check or destructive testing, chemical analysis• Loading direction may show failure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... instability. Under certain conditions, both transgranular fracture and IG fracture are found. Consequently, an analysis of rupture-life data or component failure is not complete without a thorough metallographic examination to establish the initial failure mechanism. Aging Age-hardening alloys, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
.... SCC tests were performed on specimens of PHSS in various heat treated conditions ( Ref. 11 ). The specimens were exposed to a severe seacoast atmosphere for up to 18 years. In the case of the PH 13-8 Mo alloy, the SCC resistance improved as the aging temperature increased. In the H950 temper, cracking...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... calculations for the affected components showed adequate safety margins well within regulation limits. This was confirmed by a nearly 30-year period of satisfactory service and component performance. The oleo cylinder forging was identified as an age-hardenable aluminum alloy (type 7014) of British origin...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001031
EISBN: 978-1-62708-214-3
..., is used for the liner, with cooling channels machined into it through which LH is pumped ( Fig. 1 ). NARloy-Z is a copper-base alloy containing 3% Ag and 0.5% Zr. Silver acts as a precipitation hardener, and zirconium acts as a getter for soluble oxygen. The NARloy-Z goes through a fabrication process...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... with nonferrous heat treatments. The processes involved in cold working of certain ferrous and nonferrous alloys are also covered. carbonitriding carburizing cold working failure analysis furnaces hardenability nonferrous alloys quenching stress stainless steel tempering FAILURE ANALYSTS need...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... precipitate continues to age at creep temperatures, brief primary creep often transitions to a long, upward increase of creep rate, with only a point of inflection identifying the secondary creep regime. For example, aging of normalized and tempered 0.5Cr-0.5Mo-0.25V alloy steel during creep under 80 MPa...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... that enhances cross slip or twinning, or that increases the rate of work hardening will retard crack nucleation. On the other hand, alloying usually raises the flow stress of a metal, which speeds up crack propagation, thus at least partly offsetting the potentially beneficial effect on fatigue-crack nucleation...
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
... reduction is small, mechanical properties, chiefly toughness and ductility, are affected. However, it should also be noted that overheating may occur during the solution anneal of age hardening alloy systems. In this case, grain boundary porosity by melting of the eutectic constituent occurs and can result...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
...). Source: Ref 30 There is also a particle size distribution in high-strength, age-hardening aluminum alloys, but different behavior in an aluminum casting alloy has been reported ( Ref 31 ). The iron- and/or silicon-rich phases are the inclusions that are smaller than other phases created...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... toughness and ductility, are affected. However, it should also be noted that overheating may occur during the solution anneal of age-hardening alloy systems. In this case, grain-boundary porosity by melting of the eutectic constituent occurs and can result in significantly reduced ductility and toughness...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
... Abstract The U-0.8wt%Ti alloy is often used in weapon applications where high strength and fairly good ductility are necessary. Components are immersion quenched in water from the gamma phase to produce a martensitic structure that is amenable to aging. Undesirable conditions occur when...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001547
EISBN: 978-1-62708-225-9
..., examination. Differences in corrosion properties and stress-corrosion resistance of the two alloys in the form of age-hardened wire (hardness = R c 47 to 49) with diameters of 0.18 in. (5 mm) were not obvious. Corrosion properties were similar: Neither material was corroded by short-term exposure...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... distribution in high-strength age-hardening aluminum alloys, but different behavior in an aluminum casting alloy has been reported ( Ref 31 ). The iron- and/or silicon-rich phases are the inclusions that are smaller than other phases created by solute additions for age-hardening response. In this case...