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Title: Thick grain boundary induced strengthening in nanocrystalline Ni alloy

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/c9nr06843k· OSTI ID:1801249

Grain refinement has been extensively used to strengthen metallic materials for decades. Grain boundaries act as effective barriers to the transmission of dislocations, consequently leading to strengthening. Conventional grain boundaries have a thickness of 1–2 atomic layers, typically ~0.5 nm for most metallic materials. Here, we report, however, the formation of ~3 nm thick grain boundaries in a nanocrystalline Ni alloy. In situ micropillar compression studies coupled with molecular dynamics simulations suggest that the thick grain boundaries are stronger barriers than conventional grain boundaries to the transmission of dislocations. This paper provides a fresh perspective for the design of high strength, deformable nanostructured metallic materials.

Research Organization:
Texas A & M Univ., College Station, TX (United States). Texas A & M Engineering Experiment Station; Purdue Univ., West Lafayette, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
NE0008549; SC0016337
OSTI ID:
1801249
Alternate ID(s):
OSTI ID: 1577006
Journal Information:
Nanoscale, Vol. 11, Issue 48; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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