Shock-induced amorphization in ultra-fine grained pure copper

It is not easy to find amorphization in monocrystalline materials. This study demonstrates that amorphization can be introduced in ultra-fine grained copper by a novel technique- dynamic severe plastic deformation. High-resolution electron microscope observations reveal the crystalline-to-amorphizat...

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Bibliographic Details
Published inMRS communications Vol. 12; no. 1; pp. 58 - 61
Main Authors Wang, Tao, Ye, Tian, Feng, Yong, Wang, Kai-Xuan, Du, Yu-Xuan, Liu, Xiang-Hong, Zhao, Feng
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.02.2022
Subjects
Biomaterials
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Engineering
Materials Science
Nanotechnology
Polymer Sciences
Research Letter
Amorphous
Shock loading
Fracture
Alloy
Dislocations
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Summary:It is not easy to find amorphization in monocrystalline materials. This study demonstrates that amorphization can be introduced in ultra-fine grained copper by a novel technique- dynamic severe plastic deformation. High-resolution electron microscope observations reveal the crystalline-to-amorphization transition under an ultrahigh strain rate (~ 10 6  s −1 ) and large shear strain (200%). These experiments show that the localized amorphization might be introduced by profuse dislocations and stacking faults nucleation and their strong interactions under extreme loading condition by molecular dynamics simulations. Our works also point to the onset of localized amorphization as a potential ultra-high strain rate deformation mode. Graphical abstract
ISSN:2159-6859
2159-6867
DOI:10.1557/s43579-021-00140-x