skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Deformation of nanocrystalline materials at ultrahigh strain rates - microstructure perspective in nanocrystalline nickel

Abstract

Nanocrystalline materials with grain sizes smaller than 100 nm have attracted extensive research in the past decade. Due to their high strength, these materials are good candidates for high pressure shock loading experiments. In this paper, we investigated the microstructural evolutions of nanocrystalline nickel with grain sizes of 10-50 nm, shock-loaded in a range of pressures (20-70 GPa). A laser-driven isentropic compression process was applied to achieve high shock-pressures in a timescale of nanoseconds and thus the high-strain-rate deformation of nanocrystalline nickel. Postmortem transmission electron microscopy (TEM) examinations reveal that the nanocrystalline structures survive the shock deformation and that dislocation activity is the prevalent deformation mechanism when the grain sizes are larger than 30 nm, without any twinning activity at twice the stress threshold for twin formation in micrometer-sized polycrystals. However, deformation twinning becomes an important deformation mode for 10-20 nm grain-sized samples.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
893573
Report Number(s):
UCRL-PROC-220628
Journal ID: ISSN 1155--4339; TRN: US200625%%409
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 134; Conference: Presented at: 8th International Conference on Mechanical and Physical Behavior of Materials Under Dynamic Loading (Dymat 2006), Dijon, France, Sep 11 - Sep 15, 2006
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPRESSION; DEFORMATION; DISLOCATIONS; GRAIN SIZE; MICROSTRUCTURE; NICKEL; POLYCRYSTALS; STRAIN RATE; TRANSMISSION ELECTRON MICROSCOPY; TWINNING

Citation Formats

Wang, Y, Bringa, E, Victoria, M, Caro, A, McNaney, J, Smith, R, and Remington, B. Deformation of nanocrystalline materials at ultrahigh strain rates - microstructure perspective in nanocrystalline nickel. United States: N. p., 2006. Web. doi:10.1051/jp4:2006134140.
Wang, Y, Bringa, E, Victoria, M, Caro, A, McNaney, J, Smith, R, & Remington, B. Deformation of nanocrystalline materials at ultrahigh strain rates - microstructure perspective in nanocrystalline nickel. United States. doi:10.1051/jp4:2006134140.
Wang, Y, Bringa, E, Victoria, M, Caro, A, McNaney, J, Smith, R, and Remington, B. Mon . "Deformation of nanocrystalline materials at ultrahigh strain rates - microstructure perspective in nanocrystalline nickel". United States. doi:10.1051/jp4:2006134140. https://www.osti.gov/servlets/purl/893573.
@article{osti_893573,
title = {Deformation of nanocrystalline materials at ultrahigh strain rates - microstructure perspective in nanocrystalline nickel},
author = {Wang, Y and Bringa, E and Victoria, M and Caro, A and McNaney, J and Smith, R and Remington, B},
abstractNote = {Nanocrystalline materials with grain sizes smaller than 100 nm have attracted extensive research in the past decade. Due to their high strength, these materials are good candidates for high pressure shock loading experiments. In this paper, we investigated the microstructural evolutions of nanocrystalline nickel with grain sizes of 10-50 nm, shock-loaded in a range of pressures (20-70 GPa). A laser-driven isentropic compression process was applied to achieve high shock-pressures in a timescale of nanoseconds and thus the high-strain-rate deformation of nanocrystalline nickel. Postmortem transmission electron microscopy (TEM) examinations reveal that the nanocrystalline structures survive the shock deformation and that dislocation activity is the prevalent deformation mechanism when the grain sizes are larger than 30 nm, without any twinning activity at twice the stress threshold for twin formation in micrometer-sized polycrystals. However, deformation twinning becomes an important deformation mode for 10-20 nm grain-sized samples.},
doi = {10.1051/jp4:2006134140},
journal = {},
number = ,
volume = 134,
place = {United States},
year = {Mon Apr 10 00:00:00 EDT 2006},
month = {Mon Apr 10 00:00:00 EDT 2006}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: