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Microstructures and Textures of Electrodeposited Ni/Invar Bimetal  

Kang, Ji Hoon (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Seo, Jeong Ho (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Park, Yong Bum (Department of Materials Science and Metallurgical Engineering, Sunchon National University)
Publication Information
Korean Journal of Metals and Materials / v.46, no.7, 2008 , pp. 420-426 More about this Journal
Abstract
By using electrodeposition, we developed a new method to produce Ni/Invar bimetal sheets, which have been used for the present study to investigate the texture evolution during annealing. The grains of electrodeposited Ni were columnar, while those of electrodeposited Fe-Ni alloy were nanocrystalline. These different parts of the bimetal underwent different evolution of textures and microstructures during annealing. In the nanocrystalline Invar, the as-deposited textures were of fiber-type characterized by strong <100>//ND and weak <111>//ND components, and the occurrence of grain growth resulted in the strong development of the <111>//ND fiber texture with the minor <100> // ND components. On the other hand, in the columnar-structured Ni part, the as-deposited <110>//ND fiber texture transformed to the <112>//ND fiber texture due to recrystallization occurring above $550^{\circ}C$. The development of microtextures which took place during annealing in the Ni/Invar interfacial regions was investigated by using the OIM analysis, and discussed in terms of the effect of atomic diffusion across the interfaces.
Keywords
Bimetal; Nanocrystalline Invar; Columnar Ni; Electrodeposition; Grain growth; Texture;
Citations & Related Records
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