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Structure-Property Relationships in Shape Memory Metallic Glass Composites

Şopu, Daniel ; Yuan, Xudong ; Moitzi, Franco ; Stoica, Mihai ; Eckert, Jürgen (2024)
Structure-Property Relationships in Shape Memory Metallic Glass Composites.
In: Materials, 2019, 12 (9)
doi: 10.26083/tuprints-00016522
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Structure-Property Relationships in Shape Memory Metallic Glass Composites
Language: English
Date: 16 January 2024
Place of Publication: Darmstadt
Year of primary publication: 2019
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 12
Issue Number: 9
Collation: 10 Seiten
DOI: 10.26083/tuprints-00016522
Corresponding Links:
Origin: Secondary publication DeepGreen

Metallic glass composites with shape memory crystals show enhanced plasticity and work-hardening capability. We investigate the influence of various critical structural aspects such as, the density of crystalline precipitates, their distribution and size, and the structural features and intrinsic properties of the phase on the deformation behavior of metallic amorphous Cu₆₄Zr₃₆ composites with B2 CuZr inclusions using molecular dynamics simulations. We find that a low density of small B2 inclusions with spacing smaller than the critical shear band length controls the formation and distribution of plastic zones in the composite and hinders the formation of critical shear bands. When the free path for shearing allows the formation of mature shear bands a high volume fraction of large B2 precipitates is necessary to stabilize the shear flow and avoid runaway instability. Additionally, we also investigate the deformation mechanism of composites with pure copper crystals for comparison, in order to understand the superior mechanical properties of metallic glass composites with shape memory crystals in more detail. The complex and competing mechanisms of deformation occurring in shape memory metallic glass composites allow this class of materials to sustain large tensile deformation, even though only a low-volume fraction of crystalline inclusions is present.

Uncontrolled Keywords: metallic glass composites, shape memory alloys, molecular dynamics, plasticity
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-165223
Additional Information:

This article belongs to the Special Issue Computational Design of Complex Structural Alloys

Classification DDC: 500 Science and mathematics > 540 Chemistry
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 16 Jan 2024 10:42
Last Modified: 02 Apr 2024 11:53
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/16522
PPN: 51670785X
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