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age-hardening treatment

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001451
EISBN: 978-1-62708-224-2
... and aged condition, rupture occurs in a wholly brittle manner, but ductile behaviour can be restored either by a sub-critical annealing treatment which results in recrystallisation of the work-hardened layer and the re-solution of the precipitates responsible for the ageing, or by removing the surface...
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
...Abstract Abstract This case study demonstrates that Alloy 601 (UNS N06601) is susceptible to strain-age cracking. The observation illustrates the potential importance of post weld heat treatment to the successful utilization of this alloy in certain applications. Steam reforming Inconel...
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
.... Heat Treatment The PH 13-8 Mo heat treatment consists of three steps: solutionizing at 1700°F ± 25°F (927°C ± 14°C) for not less than 30 minutes, quenching in air or oil to below 60°F (16°C), and finally aging ( Ref. 3 ). The standard aging temperatures are 950, 1000, 1025, 1050, 1100, or 1150°F...
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
... polymers but not on a macroscopic scale in a metallic material. With regard to fatigue, materials with poor ductility can still experience crack initiation and growth, because some slight plasticity may by present. Relatively brittle metals such as hardened steel and gray cast iron do not always form...
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
... ductility can still experience crack initiation and growth since some slight plasticity may by present. Relatively brittle metals such as hardened steel and gray cast iron do not always form microscopically identifiable striations and macroscopic beach marks in cyclic failures. Transgranular Cleavage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
.... 8 Representative striations observed within the fatigue crack propagation regions of each component. Magnification 5000× Sections of an “A” and “C” rod were re-heat treated and aged to the H1050 condition at ARL, with the intent of determining whether the prior heat treatment was performed...
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
... for a Titan 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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
... was ultimately prevented by changing the manufacturing procedure to allow for a reheat treatment, consisting of solution treatment and aging of the machined part just prior to plating. For parts that cracked after pressure testing, excessive dimensional changes precluded the inclusion of a reheat treatment...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001723
EISBN: 978-1-62708-221-1
.... The above series of tests was carried out five days after shearing and, in order to check if natural ageing was a further factor in promoting brittleness, additional specimens were work-hardened on one sawn edge by hammer blows and others impressed with a notch formed by forcing into the specimen a 1...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... Hertzian pressure ( p H 0 ) Maximum dynamic Hertzian pressure ( p H dyn ) U.S. standard EU standard Heat treatment (a) MPa ksi MPa ksi MPa ksi AISI 52100 100Cr6 H (WN 1.3505) Through hardening 1900 276 4000 580 1500 218 AISI 5115 16MnCr5 E (WN...
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
... by Hatch [ 3 ], as he indicates that “the tensile properties of the aluminum–zinc–magnesium alloys in the as-cast (F temper) condition change rapidly during the first few weeks of room temperature aging, because of natural precipitation hardening. Additional hardening continues thereafter...
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
... of springs, failures frequently occurred at the base of the end hooks after a few hundred thousand load cycles. The springs, made from 0.02 in. (0.5 mm) diameter 17-7PH stainless steel wire, were age hardened at 900 F (482 C) for 1 h (CH900 condition) after coiling and then chemically treated to produce...
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
... and material factors that cause a part to fail during heat treatment. The article discusses the problems associated with heating and furnaces, quenching media, quenching stresses, hardenability, tempering, carburizing, carbonitriding, and nitriding as well as potential stainless steel problems and problems...
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
... fluctuations as well as restriction to movement. Fatigue cracks initiated 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...
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.c9001670
EISBN: 978-1-62708-217-4
.... The flight missile cases are aged after shear spinning. Therefore, if shear spinning produced unaged martensite, the aging treatment would restore hardness. Thus, for unaged martensite to be present in the investigated flight cases, they must have been exposed to a high temperature subsequent to fabrication...
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
...-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 that includes casting, forging, and heat treatment. Chemical analysis is performed at various stages...
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
... for this service in this condition, because the alloy is an age-hardenable grade and its resistance to stress corrosion can be influenced by temper or age-hardening heat treatment. Most Probable Cause Remedial Action The aircraft had an 18,000 kg (40,000 lb) gross landing weight and tricycle landing gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001474
EISBN: 978-1-62708-224-2
... to bring about failure in a brittle manner, particularly if, as seems likely, shock loading conditions prevailed at the time of failure. In addition, the material was found to he susceptible to strain-age hardening and, therefore, probably strain-age embrittlement, and it is possible that its notch...
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...