Mechanical Behavior of Electrodeposited Bulk Nanocrystalline Fe-Ni Alloys

Abstract

Bulk nanocrystalline Fe-Ni alloys with Ni content of 40-55 at.%, grain size of 12-15 nm, and hardness of 3.9-4.6 were prepared by an electrodeposition. The decrease in the hardness values as grain size decreased was discussed in terms of grain refinement effect, solid solution strengthening, and grain boundary relaxation strengthening. It was found that the change of Ni content could not significant solid solution strengthening, and there were no difference in the state of grain boundary for each sample. Micro X-ray diffraction analysis on the sample after tensile tests showed that the (200) texture was developed but full width at half maximum was not changed. This indicated the potency that the grain boundary activity would be induced by a tensile loading. The softening behavior of electrodeposited Fe-Ni alloys would be related to the transition of the dominant deformation mechanisms.

Electrodeposition for Bulk Nanocrystalline Ni Alloys and Their Mechanical Properties

“…Keywords : Electrodeposition, Nanocrystalline Metal, Nickel Alloys, Mechanical Properties ----------------------------------------------------------------------------------------- 著者ら [30,32,[43][44][45] Petegem ら [46,47] 図 5 (a) 電析バルクナノ結晶 Ni-Fe 合金 , , における実際の引張試験により得られた伸びと予測式から算出 した予測値の関係 ， (b) 電析バルクナノ結晶メタルに対する延性マップ…”

Production and Characterization Of Electroless Ni Coated Fe-Co Composite Using Powder Metallurgy In Microwave Furnace

“…It has been stated that microwave sintering consumes less energy in a short time together with the advantage of low temperature sintering [22][23][24]. The mechanical and magnetic properties of the electro-shaped nanocrystalline Fe-Ni thin film have been investigated and the Fe-Ni thin film has been commercially accepted with its grain size and thermal expansion coefficient and permeability properties [25][26][27][28]. Recently, there has been an increased interest in the use of magnetic materials due to their potential applications in ferrofluids, advanced magnetic materials, catalysts, optical and mechanical devices, high-intensity magnetic imaging, and medical diagnostics [29][30][31][32][33][34][35].…”