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Mechanical Properties of Nanocrystalline and Ultrafine‐Grained Nickel with Bimodal Microstructure
Author(s) -
Qian Tao,
Karaman Ibrahim,
Marx Michael
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201300570
Subject(s) - materials science , nanocrystalline material , microstructure , metallurgy , ductility (earth science) , pressing , nickel , severe plastic deformation , friction stir processing , composite material , nanotechnology , creep
The aim of this work was to use bimodal microstructures to improve ductility and fatigue resistance of nanocrystalline (NC) and ultrafine‐grained (UFG) materials while keeping the materials’ high strength. Nickel plates produced by pulsed electrodeposition were used as NC base material while as UFG base material high‐purity nickel was processed by equal channel angular pressing. After different heat treatments, bimodal microstructures could be realized in the size ranges of NC/UFG and UFG/coarse grained (CG). While the UFG/CG nickel revealed an improved ductility but little influence on the fatigue resistance, the NC/UFG nickel shows an extraordinary fatigue resistance.