Alloying effects on ductility of nanostructured Cu-X (X = Zr and W) thin films

被引：8

作者：

Zhao, J. T. ^{[1
]}

Zhang, J. Y. ^{[1
]}

Yuan, H. Z. ^{[1
]}

Wu, K. ^{[1
]}

Liu, G. ^{[1
]}

Sun, J. ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

来源：

SCRIPTA MATERIALIA | 2018年 / 152卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Nanocrystalline metal; Columnar grains; Cu-Zr and Cu-W films; Grain boundary segregation; Ductility; TWIN THICKNESS; GRAIN-BOUNDARY; EMBRITTLEMENT; STRENGTH; NUCLEATION; PLASTICITY; STABILITY; BEHAVIOR; METALS;

D O I：

10.1016/j.scriptamat.2018.04.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Alloying effect on tensile ductility of nanostructured Cu-X (X = Zr and W) thin films was studied in comparison. Both Zr and W atoms segregated at grain boundaries (GBs) and increased the GB cohesion energy, leading to similar increase of ductility in as-deposited Cu-X films. After annealing treatment, however, changes in ductility showed different alloying effect: the Cu-Zr one increased while the Cu-W one decreased when compared with their as-deposited counterparts. This discrepancy was rationalized by different microstructural evolution that intergranular CuZr amorphous layer was produced in the Cu-Zr film while intergranular W grains were formed in the Cu-W one. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：146 / 149

页数：4

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