Tailoring the formation of twins in Al by introducing epitaxial layer interfaces

SCRIPTA MATERIALIA

卷:192

Article

Xue, S. C.¹  Zhang, Y. F.¹  Li, Qiang¹  Ding, Jie¹  Wang, H.¹  Zhang, X.¹ 

[1] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47906 USA

关键词: Nanotwinned Al;    Twinning;    multilayers;    Epitaxy;    Magnesium;   

DOI  :  10.1016/j.scriptamat.2020.09.043

来源: Elsevier

【 摘 要 】

Twin boundaries have enabled unique mechanical and physical properties in metallic materials. However, growth twins are rarely observed in Al due to its high stacking fault energy. In this study, we report on the synthesis of high-density growth twins in sputtered Al/Mg multilayer films. The formation mechanisms of incoherent and coherent twin boundaries are discussed. Besides, the incoherent twin boundary related structure, 9R phase, was also identified. This study highlights an effective method to elevate the twin /9R phase density in metals with high stacking fault energy. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free