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Title: Grain Growth in Nanosized Nickel Deformed in a Confining Environment

Abstract

Stress-induced grain growths were observed in many nanosized metals and alloys. Correctly understanding this unique feature is critical in designing and tailoring proper nanostructures for particular applications in mechanically harsh environments, e.g., high-stress concentration, mechanical vibrations. Though extensive researches have been carried out on metals or alloys subjected to deformation, experimental studies on metals deformed in a confining environment are severely lacking. Nearly all of the previous investigations on this theme were carried out either through theoretical simulations or by using transmission electron microscopy to probe grain variation in vacuo. In the present study, we employed a powerful high-pressure technique along with high-energy synchrotron X-rays to monitor the grain size evolution in situ, in nanosized nickel deformed in a confining environment. Our experimental data demonstrate, for the first time, that grain sizes grow with the increment of the confining pressure. Since plasticity strongly depends on the grain size of a given material, understanding and controlling fundamental mechanisms leading to stress-assisted grain growth may pave a new route to improve the mechanical properties of nanosized materials by tuning confining environment within which the deformation is operated.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF) - Directorate for Geosciences Division of Earth Sciences (GEO/EAR); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1531173
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 123; Journal Issue: 22
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Yuejian, and Wen, Jianguo. Grain Growth in Nanosized Nickel Deformed in a Confining Environment. United States: N. p., 2019. Web. doi:10.1021/acs.jpcc.9b01142.
Wang, Yuejian, & Wen, Jianguo. Grain Growth in Nanosized Nickel Deformed in a Confining Environment. United States. doi:10.1021/acs.jpcc.9b01142.
Wang, Yuejian, and Wen, Jianguo. Thu . "Grain Growth in Nanosized Nickel Deformed in a Confining Environment". United States. doi:10.1021/acs.jpcc.9b01142.
@article{osti_1531173,
title = {Grain Growth in Nanosized Nickel Deformed in a Confining Environment},
author = {Wang, Yuejian and Wen, Jianguo},
abstractNote = {Stress-induced grain growths were observed in many nanosized metals and alloys. Correctly understanding this unique feature is critical in designing and tailoring proper nanostructures for particular applications in mechanically harsh environments, e.g., high-stress concentration, mechanical vibrations. Though extensive researches have been carried out on metals or alloys subjected to deformation, experimental studies on metals deformed in a confining environment are severely lacking. Nearly all of the previous investigations on this theme were carried out either through theoretical simulations or by using transmission electron microscopy to probe grain variation in vacuo. In the present study, we employed a powerful high-pressure technique along with high-energy synchrotron X-rays to monitor the grain size evolution in situ, in nanosized nickel deformed in a confining environment. Our experimental data demonstrate, for the first time, that grain sizes grow with the increment of the confining pressure. Since plasticity strongly depends on the grain size of a given material, understanding and controlling fundamental mechanisms leading to stress-assisted grain growth may pave a new route to improve the mechanical properties of nanosized materials by tuning confining environment within which the deformation is operated.},
doi = {10.1021/acs.jpcc.9b01142},
journal = {Journal of Physical Chemistry. C},
number = 22,
volume = 123,
place = {United States},
year = {2019},
month = {6}
}