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overaging

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Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005960
EISBN: 978-1-62708-168-9
... Abstract Hardenable steels with high-alloy content includes a family of nickel-cobalt steels with high strength and high toughness. This article describes various heat treatments, namely, normalizing, annealing, hardening, tempering, stress relieving, overaging, quenching, refrigeration, and...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006622
EISBN: 978-1-62708-210-5
..., bar, and profiles T652 Solution heat treated, compressed to a permanent set of 1–5% for stress relief, and artificially aged 2014, 6061, 6151, 7075 Forgings and forging stock T7 Solution heat treated and artificially overaged/stabilized to control important properties (rarely used without...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006531
EISBN: 978-1-62708-207-5
... heat treated and artificially aged; mechanical property level higher than T6 achieved through special control of the process (6000-series alloys) T7 Solution heat treated and stabilized T73 Solution heat treated and artificially overaged to achieve the best stress-corrosion resistance T732...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006746
EISBN: 978-1-62708-210-5
...) threshold in the short transverse (S-T) direction versus minimum yield strength in the longitudinal (L) direction of alloys 7449-T6, 7150-T77, 7050-.T76, 7175-T73, and 7475-T73. Thickness, 50 mm (2 in.). Source: Ref 1 Alloy 7449 plate is available in T7651 (peak aged) and T7951 (overaged) tempers...
Book Chapter

Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006745
EISBN: 978-1-62708-210-5
... developed by Pechiney and introduced in 1994 to provide higher strength properties than incumbent 7 x 75 and 7150 alloys. Alloy 7349 extrusions are available in the thickness range of 1 to 20 mm (0.06 to 0.75 in.) in very formable F and O tempers, as well as the peak-aged T6511 and overaged T76511 tempers...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002414
EISBN: 978-1-62708-193-1
... contrast, in overaged aluminum alloys, reinforcement improves not only the stress-controlled fatigue behavior but also the resistance to fatigue crack propagation. Under stress-controlled high-cycle fatigue conditions, a high volume fraction of fine reinforcement particles is preferred for fatigue crack...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006737
EISBN: 978-1-62708-210-5
... strength (T6x) condition. However, service failures due to the intergranular stress corrosion cracking (SCC) occurred in the highest strength (T6x) condition. These problems were largely overcome in the 1960s by overaging the affected alloys, but with a 10 to 30% reduction in strength, which did not...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006262
EISBN: 978-1-62708-169-6
... metals retrogression and reaging treatment stress-corrosion cracking RETROGRESSION AND REAGING is an established form of postquench aging heat treatment. It improves the balance of tensile properties with resistance to stress-corrosion cracking when compared to traditional overaging treatments...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006733
EISBN: 978-1-62708-210-5
... Aluminum alloy 7050 product tempers Temper Description Product T7 Solution heat treated and artificially overaged/stabilizcd to control important properties (rarely used without second digit as below) Rivets T73510 Solution heat treated, stretched a controlled amount (product dependent...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002411
EISBN: 978-1-62708-193-1
... are considerably larger than the precipitates and spaced sufficiently apart (i.e., long mean free path) so they do not contribute significantly to the fatigue performance. An overaged structure will generally result in improved bending or rotating fatigue performance. Even though overaging results...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003618
EISBN: 978-1-62708-182-5
... by artificial aging to peak strength, 6 xxx alloys often require overaging beyond peak strength in order to significantly decrease IG corrosion susceptibility. The alloys in this series all contain zinc (<9%). In addition, nearly all of these alloys contain magnesium (<4%), and many of them...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006285
EISBN: 978-1-62708-169-6
... heat treated and artificially aged; mechanical property level higher than T6 achieved through special control of the process (6000-series alloys)  T7 Solution heat treated and stabilized  T73 Solution heat treated and artificially overaged to achieve the best stress-corrosion resistance...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001043
EISBN: 978-1-62708-161-0
.... With long aging times or high temperatures, however, hardness will reach a maximum and then will start to drop, as shown by the data in Fig. 2 . Softening in these steels usually results not only from overaging in the usual sense of the term—that is, coarsening of the precipitate particles—but also...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005230
EISBN: 978-1-62708-187-0
... the artificial aging of castings, while T6 and T7 tempers refer to solution heat treatment, quenching, and either peak aging (T6) or overaging (T7). All other T tempers, such as T2, T3, T8, T9, and T10, designate heat treatments for wrought alloys subjected to cold work. In this article, the...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006726
EISBN: 978-1-62708-210-5
... control and processing, primarily through the development of new overaging heat treatments. For some of the newer 2 xxx alloys, iron and silicon impurity levels are reduced to maximize fracture toughness. Fracture toughness values of select 7 xxx and 2 xxx alloys are given in Tables 1 and 2...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001085
EISBN: 978-1-62708-162-7
... aged material in order to obtain an acceptable balance of strength and ductility. Fig. 8 Effects of aging temperature and time on hardness of U-0.75Ti Fig. 9 Effect of aging temperature on tensile properties of U-0.75Ti aged 6 h Overaging occurs at temperatures in excess of...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006715
EISBN: 978-1-62708-210-5
..., maximum strength is obtained in peak aged temper (T6511). Overaged temper (T78511) is used to desensitize for intergranular corrosion. Alloy 6056-T6511 and T78511 thin extrusions are particularly suited for stiffening structures such as welded fuselage panels, where a combination of high compressive...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006744
EISBN: 978-1-62708-210-5
... for user age forming (to the Arconic T79E01 special temper). Alloy 7255-T7751 is covered by AMS 4463A-2017, Aluminum Alloy, Plate (7255-T7751) 8.0Zn – 2.3Cu – 2.0 Mg – 0.1Zr Solution Heat Treated, Stress Relieved, and Overaged,” and material design allowables are available in the MMPDS Handbook...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005948
EISBN: 978-1-62708-168-9
... to 510 °C (925 to 950 °F). The use of maraging steels in applications such as die casting tooling requires the use of an aging temperature of approximately 530 °C (985 °F) to provide an overaged structure that is more thermally stable. Table 7 contains typical mechanical properties of the...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006568
EISBN: 978-1-62708-210-5
... hold for 6–12 h; quench in water at 60–80 °C (140–180 °F). T7 overaging of 356.0 sand casting after solution treatment 205 400 3–5 h, air cool T7 overaging of 356.0 PM casting after solution treatment 225 440 7–9 h, air cool T7 overaging of A356.0 after solution treatment 225 440 7–9...