Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of an Al-Li-Cu-Mg-Ag alloy 1016/j.actaniat.2003.1
Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of an Al-Li-Cu-Mg-Ag alloy 1016/j.actaniat.2003.1
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DOI：
10.1016/j.actamat.2003.12.043
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发表时间：
2004-04-01
期刊：
影响因子：
9.4
通讯作者：
Hasegawa, A
中科院分区：
文献类型：
--
作者：
Honma, T;Yanagita, S;Hasegawa, A
利用正电子湮灭重合多普勒（CDB）光谱和三维原子探针（3DAP）分析研究了Al-Li-Cu-Mg-Ag和Al-Cu-Mg-Ag合金中预沉淀溶质聚类现象。Al-Cu-Mg-Ag合金在时效初期会形成Ag-Mg共团簇，但在含Li合金中没有发现Ag-Mg共团簇形成的证据。CDB谱显示，时效15 s后，Al-Cu-Mg-Ag合金的空位与Ag有关。在含锂合金中，空位-银缔合受到抑制。基于3DAP和CDB的结果，讨论了两种相似合金中聚类行为完全不同的原因。(C) 2004材料学报。Elsevier Ltd.出版。版权所有。
Pre-precipitation Solute Clustering in Al-Li-Cu-Mg-Ag and Al-Cu-Mg-Ag alloys has been investigated by coincidence Doppler broadening (CDB) spectroscopy of positron annihilation and three-dimensional atom probe (3DAP) analysis. Although Ag-Mg co-Clusters form in the Al-Cu-Mg-Ag alloy in the early stage of aging, no evidence for the co-cluster formation was obtained from the Li containing alloy using 3DAP. While CDB spectra indicated that vacancies are associated with Ag after aging for 15 s in the Al-Cu-Mg-Ag alloy. vacancy-Ag association is suppressed in the Li containing alloy. Based on the 3DAP and CDB results, the reasons for the completely different clustering behaviors observed in these two similar alloys are discussed. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.