Coalescence and subsequent twinning of nanocrystals during deformation of CuZr-based metallic glasses: The grain size effect

被引：8

作者：

Hajlaoui, K. ^{[1
,2
]}

Alsaleh, N. ^{[2
]}

Alrasheedi, N. H. ^{[2
]}

Yavari, A. R. ^{[3
]}

机构：

[1] Univ Sousse, LMS, ENISo, Technopole Sousse, Sousse, Tunisia

[2] Al Imam Mohammad Ibn Saud Islamic Univ IMSIU, Othman Ibn Affan St,POB 5701, Riyadh 11432, Saudi Arabia

[3] Inst Natl Polytech Grenoble, SIMaP LTPCM, F-38402 St Martin Dheres, France

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2017年 / 464卷

关键词：

Metallic glasses; Deformation; Nanocrystals; Coalescence; Twinning; Grain size; SHEAR BANDS; NANOPARTICLE DISPERSIONS; PLASTICITY; DUCTILITY; MICROSTRUCTURE; MECHANISM; ALLOYS; FLOW;

D O I：

10.1016/j.jnoncrysol.2017.03.019

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report in-situ HRTEM observations that reveal subsequent structural events occurring during deformation of CuZr-based metallic glass. During loading, B2-CuZr nanocrystals precipitate and growth in the amorphous matrix, and consecutively crystals larger than 15 nm to 20 nm undergo twinning. Results underscore a transition from a deformation mechanism controlled by shear banding in glassy matrix to twinning and dislocations gliding in precipitated and coalesced crystals. These observations provide guidance for designing metallic glasses with twin structures that improve plasticity. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：39 / 43

页数：5

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