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Title: Segregation-Induced Nanofaceting Transition at an Asymmetric Tilt Grain Boundary in Copper

Journal Article · · Physical Review Letters

We show that chemistry can be used to trigger a nanofaceting transition. In particular, the segregation of Ag to an asymmetric tilt grain boundary in Cu is investigated. Aberration-corrected electron microscopy reveals that annealing the bicrystal results in the formation of nanometer-sized facets composed of preferentially Ag-segregated symmetric Σ5{210} segments and Ag-depleted {230}/{100} asymmetric segments. Our observations oppose an anticipated trend to form coarse facets. Atomistic simulations confirm the nanofacet formation observed in the experiment and demonstrate a concurrent grain boundary phase transition induced by the anisotropic segregation of Ag.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; 17-LW-012
OSTI ID:
1488631
Alternate ID(s):
OSTI ID: 1524296
Report Number(s):
LLNL-JRNL-751237; PRLTAO; 255502
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 121 Journal Issue: 25; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

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Cited By (2)

Observations of grain-boundary phase transformations in an elemental metal journal March 2020
Mechanical properties of stabilized nanocrystalline FCC metals journal September 2019

Figures / Tables (4)


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