In situ natural ageing of Al-Cu-(Mg) alloys: The effect of In and Sn on the very early stages of decomposition

SCRIPTA MATERIALIA

卷:168

Article

Lotter, Frank¹  Petschke, Danny¹  De Geuser, Frederic²  Elsayed, Mohamed^3,4  Sextl, Gerhard^1,5  Staab, Torsten E. M.¹ 

[1] Univ Wurzburg, Dept Chem, LCTM, Roentgenring 11, D-97070 Wurzburg, Germany

[2] Univ Grenoble Alpes, CNRS, Grenoble INP, SIMAP, F-38000 Grenoble, France

[3] Martin Luther Univ Halle Wittenberg, Dept Phys, D-06120 Halle, Germany

[4] Menia Univ, Dept Phys, Fac Sci, Al Minya 61519, Egypt

[5] Fraunhofer ISC, Neunerpl 2, D-97082 Wurzburg, Germany

关键词: Al-Cu alloys;    Al-Cu-Mg alloys;    Trace elements;    Clustering;    SAXS;   

DOI  :  10.1016/j.scriptamat.2019.04.031

来源: Elsevier

【 摘 要 】

The influence of trace elements (0.01 at.% In/Sn) on the decomposition process of Al-Cu-(Mg) alloys during the very early stages of natural ageing has been investigated in situ by small angle X-ray scattering supported with differential scanning calorimetry and hardness measurements. In the binary Al-Cu alloy quenched-in vacancies are bound to In or Sn, resulting in a suppressed Cu clustering process. In Al-Cu-Mg room temperature hardening occurs much faster due to Mg entering the clusters. However, the influence of In or Sn is negligible. Cu and Mg possibly form complexes with quenched-in vacancies before they can reach a trace element atom. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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