Microstructural evolution of 7012 alloy during the early stages of artificial ageing

被引：120

作者：

Ferragut, R

Somoza, A

Tolley, A

机构：

[1] Univ Nacl Ctr Prov Buenos Aires, IFIMAT, RA-7000 Tandil, Argentina

[2] Comis Invest Cient Prov Buenos Aires, RA-7000 Tandil, Argentina

[3] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

ACTA MATERIALIA | 1999年 / 47卷 / 17期

关键词：

aluminium; ageing; phase transformations; transmission electron microscopy; positron annihilation spectroscopy;

D O I：

10.1016/S1359-6454(99)00315-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A study of the microstructural evolution of a commercial 7012 (Al-Zn-Mg-Cu) age-hardenable alloy following artificial ageing by high resolution and conventional transmission electron microscopy and positron annihilation lifetime spectroscopy is presented. At the early stages of decomposition. the microstructure included precipitation of either pre-precipitate solute clusters or Guinier-Preston zones and semicoherent eta' precipitates, with typical sizes between 1 and 10 nm. Quantitative information on the size, number density and morphology of the particles present in the microstructure was obtained. The results were correlated with those obtained using positron annihilation lifetime spectroscopy. (C) 1999 Acta Metallurgica. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：4355 / 4364

页数：10

共 36 条

[1] POSITRON-ANNIHILATION STUDY OF ETA' PRECIPITATION KINETICS IN AN ALUMINUM-ALLOY [J].