Ultrafast extreme rejuvenation of metallic glasses by shock compression

被引：100

作者：

Ding, G. ^{[1
,2
]}

Li, C. ^{[1
,3
]}

Zaccone, A. ^{[4
,5
,6
]}

Wang, W. H. ^{[7
]}

Lei, H. C. ^{[8
]}

Jiang, F. ^{[2
]}

Ling, Z. ^{[1
]}

Jiang, M. Q. ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China

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

[3] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China

[4] Univ Milan, Dept Phys, Via Celoria 16, I-20133 Milan, Italy

[5] Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge CB2 3RA, England

[6] Univ Cambridge, Cavendish Lab, Cambridge CB3 9HE, England

[7] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[8] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

来源：

SCIENCE ADVANCES | 2019年 / 5卷 / 08期

基金：

中国国家自然科学基金;

关键词：

AMORPHOUS ALLOY; STRUCTURAL RELAXATION; SHEAR BANDS; FREE-VOLUME; LIQUIDS; DEFORMATION; PLASTICITY; DYNAMICS; STRENGTH; ORIGIN;

D O I：

10.1126/sciadv.aaw6249

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Structural rejuvenation of glasses not only provides fundamental insights into their complicated dynamics but also extends their practical applications. However, it is formidably challenging to rejuvenate a glass on very short time scales. Here, we present the first experimental evidence that a specially designed shock compression technique can rapidly rejuvenate metallic glasses to extremely high-enthalpy states within a very short time scale of about 365 +/- 8 ns. By controlling the shock stress amplitude, the shock-induced rejuvenation is successfully frozen at different degrees. The underlying structural disordering is quantitatively characterized by the anomalous boson heat capacity peak of glasses. A Deborah number, defined as a competition of time scales between the net structural disordering and the applied loading, is introduced to explain the observed ultrafast rejuvenation phenomena of metallic glasses.

引用

页数：7

共 60 条

[51] Densification and Strain Hardening of a Metallic Glass under Tension at Room Temperature [J].