caa a22 4500 463225074 CHVBK 20180405153224.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10853-006-0659-6 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0659-6 Application of uniform design in optimisation of three stage ageing of Al-Cu-Mg alloys [Elektronische Daten] [N. Gao, M. Starink, N. Kamp, I. Sinclair] The hardness variations and precipitation behaviour during the three-stage ageing of three Al-Cu-Mg alloys were investigated using micro-hardness testing and differential scanning calorimetry (DSC). To facilitate the determination of an optimised heat treatment, a uniform design method was employed by which the influences of three-stage interrupted ageing on the hardness and precipitation can be elucidated with a limited number of experiments. It is found that optimised heat treatment with maximum hardness can be achieved for non-stretched materials by applying the method of three-stage ageing, but there is no obvious effect for stretched T351 materials. A long initial Stage I and a suitable Stage II ageing time are beneficial for hardness, and the Stage II ageing at 25°C shows more beneficial effect than ageing at 65°C. The hardness increase in Stage I and Stage III ageing is closely related to the S phase content. Springer Science+Business Media, LLC, 2007 Gao N. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut Starink M. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut Kamp N. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut Sinclair I. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4398-4405 0022-2461 42:12<4398 2007 42 10853 https://doi.org/10.1007/s10853-006-0659-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0659-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gao N. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut NATIONALLICENCE 700 1- Starink M. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut NATIONALLICENCE 700 1- Kamp N. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut NATIONALLICENCE 700 1- Sinclair I. Materials Research Group, School of Engineering Sciences, University of Southampton, SO17 1BJ, Southampton, UK aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/12(2007-06-01), 4398-4405 0022-2461 42:12<4398 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer