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Title: Quantification of dislocation nucleation stress in TiN through high-resolution in situ indentation experiments and first principles calculations

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep15813· OSTI ID:1236029
 [1];  [1];  [1];  [2];  [1];  [1];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Nebraska, Lincoln, NE (United States)
  3. Univ. of Michigan, Ann Arbor, MI (United States)

Using the in situ indentation of TiN in a high-resolution transmission electron microscope, the nucleation of full as well as partial dislocations has been observed from {001} and {111} surfaces, respectively. The critical elastic strains associated with the nucleation of the dislocations were analyzed from the recorded atomic displacements, and the nucleation stresses corresponding to the measured critical strains were computed using density functional theory. The resolved shear stress was estimated to be 13.8 GPa for the partial dislocation 1/6 <110> {111} and 6.7 GPa for the full dislocation ½ <110> {110}. Moreover, such an approach of quantifying nucleation stresses for defects via in situ high-resolution experiment coupled with density functional theory calculation may be applied to other unit processes.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1236029
Report Number(s):
LA-UR-15-27113; srep15813
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (6)

Micro-scale modeling of interface-dominated mechanical behavior journal October 2017
Mechanically controlling the reversible phase transformation from zinc blende to wurtzite in AlN journal March 2017
Mechanically controlling the reversible phase transformation from zinc blende to wurtzite in AlN [Supplemental Data] dataset April 2017
Mechanically controlling the reversible phase transformation from zinc blende to wurtzite in AlN April 2017
In-plane anisotropy and twin boundary effects in vanadium nitride under nanoindentation journal July 2017
A new method to reliably determine elastic strain of various crystal structures from atomic-resolution images journal November 2019

Figures / Tables (6)


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