**4. Conclusions**


structure constituents. The fact that an amorphous state is formed in Cu-Nb laminates during HPT requires further and more thorough investigation.


**Author Contributions:** Conceptualization and Methodology, A.G. and I.P.; software, I.P.; validation, A.G. and I.P.; formal analysis, I.P.; investigation, A.G. and I.P.; resources, A.G.; data curation, I.P.; writing—original draft preparation, I.P.; writing—review and editing, A.G. and I.P.; visualization, I.P.; supervision and project administration, A.G.; funding acquisition, I.P. All authors have read and agreed to the published version of the manuscript.

**Funding:** The reported study was funded by RFBR, project numbers 17-02-00402 and 20-08-00341.

**Acknowledgments:** The authors are grateful to their colleagues, Michael Karpov, Victor Vnukov, Dmitry Shtansky, Igor Shchetinin, Michael Gorshenkov, Elena Savchenko and Elena Blinova for long-term fruitful cooperation.

**Conflicts of Interest:** The authors declare no conflict of interest.
