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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM
  • Insitu-TEM characterization of carbon-based materials using nanofactory STM holder for Li-ion battery application
  • Structural characterization of mesoporous materials using SEM & TEM
  • Interface analysis between various oxides and metals through Cs-corrected (S)TEM
  • Resistive switching mechanism of graphene oxide thin films for RRAM application

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Deformation behavior of bimodal nanostructured 5083 Al alloys

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Title
Deformation behavior of bimodal nanostructured 5083 Al alloys
Author
Han, BQLee, ZonghoonWitkin, DNutt, SLavernia, EJ
Issue Date
2005-04
Publisher
SPRINGER
Citation
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, v.36A, no.4, pp.957 - 965
Abstract
Cryomilled 5083 At alloys blended with volume fractions of 15, 30, and 50 pct unmilled 5083 At were produced by consolidation of a mixture of cryomilled 5083 At and Unmilled 5083 A] powders. A bimodal grain size was achieved in the as-extruded alloys in which nanostructured regions had a grain size of 200 nm and coarse-grained regions had a grain size of I mu m. Compression loading in the longitudinal direction resulted in elastic-perfectly plastic deformation behavior. An enhanced tensile elongation associated with the occurrence of a Luders band was observed in the bimodal alloys. As the volume fraction of coarse grains was increased, tensile ductility increased and strength decreased. Enhanced tensile ductility was attributed to the occurrence of crack bridging as well as delamination between nanostructured and coarse-grained regions during plastic deformation.
URI
https://scholarworks.unist.ac.kr/handle/201301/5032
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=17744394740
DOI
10.1007/s11661-005-0289-7
ISSN
1073-5623
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