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Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses

Nandam, Sree Harsha 1; Schwaiger, Ruth 2,3; Kobler, Aaron 1; Kübel, Christian ORCID iD icon 1,2,3; Wang, Chaomin; Ivanisenko, Yulia 1; Hahn, Horst 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)
3 Kernkraft-Betriebsgesellschaft mbH Eggenstein-Leop- (Fremdeinrichtung) (KBG), Karlsruher Institut für Technologie (KIT)

Abstract:

Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving the plasticity of metallic glasses has been a long-standing goal for several decades. In this regard, nanoglass, a novel type of metallic glass, has been proposed to exhibit differences in short and medium range order at the interfacial regions, which could promote the formation of shear transformation zones. In the present work, by introducing heterogeneities at the nanoscale, both crystalline and amorphous, significant improvements in plasticity are realized in micro-compression tests. Both amorphous and crystalline dispersions resulted in smaller strain bursts during plastic deformation. The yield strength is found to increase significantly in Cu–Zr nanoglasses compared to the corresponding conventional metallic glasses. The reasons for the mechanical behavior and the importance of nanoscale dispersions to tailor the properties is discussed in detail.


Verlagsausgabe §
DOI: 10.5445/IR/1000136618
Veröffentlicht am 23.08.2021
Originalveröffentlichung
DOI: 10.1557/s43578-021-00285-4
Scopus
Zitationen: 10
Web of Science
Zitationen: 10
Dimensions
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0884-2914, 2044-5326
KITopen-ID: 1000136618
HGF-Programm 43.31.01 (POF IV, LK 01) Multifunctionality Molecular Design & Material Architecture
Erschienen in Journal of materials research
Verlag Cambridge University Press (CUP)
Band 36
Seiten 2903–2914
Vorab online veröffentlicht am 08.07.2021
Nachgewiesen in Scopus
Dimensions
Web of Science
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