Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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The Effect of B addition on the High Temperature Behavior of Low Thermal Expansion Fe-29%Ni-17%Co Kovar Alloy

저열팽창성 Fe-29%Ni-17%Co 코바 합금의 고온 변형 거동에 미치는 B 첨가의 영향

  • 권성희 (안동대학교 공과대학 신소재공학부 청정소재기술연구센터) ;
  • 박종혁 (포스코 특수강(주) 기술연구소) ;
  • 김문철 (포항산업과학연구원 신금속연구실) ;
  • 이기안 (안동대학교 공과대학 청정소재기술연구센터)
  • Published : 2008.05.08
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Abstract

The effect of B on the hot ductility of Fe-29Ni-17Co Kovar alloy and the mechanism of high temperature deformation behavior were investigated. Hot-tensile test was carried out at the temperature range of $900^{\circ}C-1200^{\circ}C$. Optical microscopy and scanning electron microscopy were used to investigate the microstructure and fracture during hot deformation. The hot ductility of Kovar alloy was drastically increased with the addition of Boron. The improvement of hot ductility results from the grain boundary migration mainly due to the dynamic recrystallization at lower temperature range($900^{\circ}C$).

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