期刊
MICRON
卷 82, 期 -, 页码 1-8出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.micron.2015.12.002
关键词
Precipitation hardening; Transmission electron microscopy; EDX tomography; Al alloy; Al3Sc; Al3Sc1-xZrx
类别
资金
- Japan Aluminium Association
- European Union [312483-ESTEEM2]
- European Research Council under the European Union [291522-3DIMAGE]
- Grants-in-Aid for Scientific Research [26600046] Funding Source: KAKEN
Variations of Vickers hardness were observed in Al-Mg-Mn alloy and Al-Mg-Mn-Sc-Zr alloy at different ageing times, ranging from a peak value of 81.2 HV at 54 ks down to 67.4 HV at 360 ks, below the initial hardness value, 71.8 HV at 0 ks for the case of Al-Mg-Mn-Sc-Zr alloy. Microstructures of samples at each ageing stage were examined carefully by transmission electron microscopes (TEMs) both in two-dimensions and three-dimensions. The presence of different types, densities, and sizes of particles were observed dispersed spherical Al3Sc1-xZrx and also block-shaped Al3Sc precipitates growing along <1 0 0>(Al) with facets {1 0 0} and {1 1 0} of the precipitates. TEM analysis both in two-dimensions and three-dimensions, performed on various samples, confirmed the direct correlation between the hardness and the density of Al3Sc. (C) 2015 Elsevier Ltd. All rights reserved.
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