期刊
MATERIALS TRANSACTIONS
卷 55, 期 12, 页码 1859-1866出版社
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.M2014268
关键词
nanocrystalline metal; electrodeposition; nickel-tungsten alloys; growth mode; meso-scale structure
资金
- [22560726]
- Grants-in-Aid for Scientific Research [26886014, 26420671] Funding Source: KAKEN
A strategy for producing highly ductile electrodeposited bulk nanocrystalline metals with face-centered cubic structures was developed in a Ni-W alloy model system. Bulk nanocrystalline Ni-W alloys with similar grain size (20-30 nm), and varying crystallographic orientations were produced. The electrodeposited alloys showed tensile elongation ranging between 0 and 13%. Scanning ion microscopy reveled that all electrodeposited alloys had similar meso-scale structures that are typical of electrodeposited metals. This indicated the variation of ductility and fracture surfaces was not caused by cluster structures filled with nano-grains. The tensile behavior of the bulk nanocrystalline Ni-W alloys could be explained by considering the effects of growth processes during electrodeposition on the presence of hydrogen and defects. Our discussion surrounding Ni-W alloys outlines the conditions necessary to obtain the high tensile ductility. Our findings are in good agreement with those for other electrodeposited nanocrystalline face-centered cubic metals. We also provide guidelines for selecting electrodeposition conditions to produce bulk nanocrystalline metals with face-centered cubic structures and high tensile ductility.
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