Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Microstructures and Textures of Electrodeposited Ni/Invar Bimetal

전주도금으로 제조된 Ni/Invar 바이메탈의 미세조직과 집합조직

  • 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)
  • 강지훈 (순천대학교 재료.금속공학과) ;
  • 서정호 (순천대학교 재료.금속공학과) ;
  • 박용범 (순천대학교 재료.금속공학과)
  • Received : 2008.04.21
  • Published : 2008.07.25
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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

Acknowledgement

Supported by : 지식경제부

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