High Tensile Ductility in Electrodeposited Bulk Nanocrystalline Ni–W Alloys

Abstract:

Bulk nanocrystalline Ni–W alloys were electrodeposited from a sulfamate bath that contained saccharin sodium as a gloss agent, and propionic acid and sodium gluconate as a complexing agent (SPG bath) to understand the tensile behavior. SPG bath with 1.0 and 5.0 g/L saccharin sodium at 45 ºC produced the bulk specimens with W content of 3.4 and 1.5 at.%, respectively. The electrodeposited alloys had a nanocrystalline structure with grain sizes of approximately 20 nm and a stronger (111) texture. The bulk nanocrystalline Ni–3.4 at.%W alloys deposited from an SPG bath with 1.0 g/L saccharin sodium exhibited a tensile strength of 1.6 GPa and tensile ductility of 1.8%. The bulk nanocrystalline Ni–1.5 at.%W alloys deposited from an SPG bath with 5.0 g/L saccharin sodium exhibited a tensile strength of 1.4 GPa and tensile ductility of 1.7%. The bulk nanocrystalline Ni–W alloys with a stronger (111) texture showed high strength and low plasticity.

• Periodical: Advanced Materials Research (Volume 922)
• Pages: 497-502
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.922.497
• Online since: May 2014
• Authors: Isao Matsui*, Yorinobu Takigawa, Kenji Higashi
• Keywords: Electrodeposition, Nanocrystalline Metal, Ni-W, Saccharin Sodium, Tensile Properties

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