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Measurement of Lattice Distortion in NbTaTiV and NbTaTiVZr Using Electron Microscopy

  • 22-03-2021
  • Topical Collection: Innovations in High Entropy Alloys and Bulk Metallic Glasses
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Abstract

The article delves into the measurement of lattice distortion in NbTaTiV and NbTaTiVZr using high-annular-angle dark-field scanning transmission electron microscopy (HAADF-STEM). It begins by introducing the concept of high-entropy alloys (HEAs) and their superior mechanical properties, particularly focusing on the lattice distortion effect. The study then describes the preparation and characterization of the equimolar refractory HEAs NbTaTiV and NbTaTiVZr, which exhibit single-phase body-centered-cubic (bcc) structures. The authors employ HAADF-STEM to accurately measure lattice distortion, revealing that NbTaTiVZr exhibits larger lattice distortion than NbTaTiV due to its larger atomic size mismatch. The study also discusses the impact of short-range ordering on lattice distortion and compares the results with previous synchrotron measurements. The precision and advantages of the HAADF-STEM method are highlighted, making this article a valuable resource for researchers interested in the mechanical properties of HEAs and advanced materials characterization techniques.

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Title
Measurement of Lattice Distortion in NbTaTiV and NbTaTiVZr Using Electron Microscopy
Authors
Yi Chou
Chanho Lee
Peter K. Liaw
Yi-Chia Chou
Publication date
22-03-2021
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 6/2021
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-021-06215-7
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