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Title: Self-patterning Gd nano-fibers in Mg-Gd alloys

Manipulating the shape and distribution of strengthening units, e.g. particles, fibers, and precipitates, in a bulk metal, has been a widely applied strategy of tailoring their mechanical properties. Here, we report self-assembled patterns of Gd nano-fibers in Mg-Gd alloys for the purpose of improving their strength and deformability. 1-nm Gd nano-fibers, with a $$\langle$$c$$\rangle$$ -rod shape, are formed and hexagonally patterned in association with Gd segregations along dislocations that nucleated during hot extrusion. Such Gd-fiber patterns are able to regulate the relative activities of slips and twinning, as a result, overcome the inherent limitations in strength and ductility of Mg alloys. Finally, this nano-fiber patterning approach could be an effective method to engineer hexagonal metals.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [5]
  1. Shanghai Jiao Tong Univ. (China). State Key Lab. of Metal Matrix Composites; Shanghai Jiao Tong Univ. (China). National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering
  2. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering
  3. China Academy of Engineering Physics, Mianyang, Sichuan (China). National Key Lab of Shockwave and Detonation Physics, Inst. of Fluid Physics
  4. Shanghai Jiao Tong Univ. (China). National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering
  5. Shanghai Jiao Tong Univ. (China). State Key Lab. of Metal Matrix Composites
Publication Date:
Grant/Contract Number:
YK2015-0202002
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of Nebraska, Lincoln, NE (United States). Dept. of Mechanical and Materials Engineering
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Metals and alloys; Structural properties
OSTI Identifier:
1390057