Effect of Zr content on the strain rate sensitivity of nanohardness of Ti-Zr-Cu-Ni-Al thin film metallic glass

The strain rate sensitivity of nanohardness of a magnetron sputtered Ti-Zr-Cu-Ni-Al thin film metallic glass has been investigated. Nanoindentation tests were performed at various loading rates on thin film metallic glasses with three different Zr content. Replacement of Ti with Zr has led to an inc...

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Bibliographic Details
Published in:Surface & coatings technology 2024-02, Vol.478, p.130370, Article 130370
Main Authors: Paremmal, Priyesh, Sairam, K., Mishra, Soumya Ranjan, Govind, U., Malladi, S.R.K., Dutta-Gupta, Shourya, Rao, M.S. Ramachandra, Murty, B.S.
Format: Article
Language:English
Subjects:
Hardness
Nanoindentation
Strain rate sensitivity
Thin film metallic glass
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Summary:The strain rate sensitivity of nanohardness of a magnetron sputtered Ti-Zr-Cu-Ni-Al thin film metallic glass has been investigated. Nanoindentation tests were performed at various loading rates on thin film metallic glasses with three different Zr content. Replacement of Ti with Zr has led to an increase in hardness due to higher atomic packing efficiency and stronger bonds. A non-serrated p-h curve independent of Zr content and a positive dependency of nanohardness on Zr content was observed. The negative strain rate sensitivity and enhancement of strain rate sensitivity with Zr content were discussed. •A fully amorphous Ti-Zr-Cu-Ni-Al thin film metallic glass (TFMG) is magnetron sputtered with varying Zr content.•A series of nano indentation tests revealed an improved hardness and more negative strain rate sensitivity with increasing Zr content.•The relation between the SRS of TFMG and the relative content of Zr is explained based on the shear transformation zone.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2023.130370