Strength-toughness optimisation scenarios through interrupted ageing in AA6061 and AA2024

Risanti, D. D. and Rivera-Díaz-del-Castillo, P. E.J. and Van Der Zwaag, S. (2008) Strength-toughness optimisation scenarios through interrupted ageing in AA6061 and AA2024. In: Aluminum Alloys. UNSPECIFIED, USA, pp. 79-84.

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Abstract

Aimed at the maximisation of strength-toughness relationships in aluminium alloys, interrupted ageing has been proposed as a means to combine these properties. Such processing schedule initiates with a T6 short underageing (177 °C for up to 1 hour), followed by a dwell period at a lower temperature for periods of up to two weeks, and further re-ageing to the T6 temperature. By combining DSC with hardness, tensile and Kahn-tear testing, the present work studies several heat treatment scenarios and their impact in the strengthtoughness improvements in AA6061 and AA2024. The dwell temperature of 65 °C results in a hardness increase whereas interruption at room temperature decreases it in comparison to the standard T6. In AA2024, interruption at room temperature leads to the formation of GPB2 zones. The strength-toughness behaviour for the different heat treatment scenarios is presented.

Item Type:
Contribution in Book/Report/Proceedings
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500/2506
Subjects:
ID Code:
125488
Deposited By:
Deposited On:
24 May 2018 13:46
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:49