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한승전,이재현,임성환,안지혁,김광호,김상식 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.6
Cu-Ni-Si alloys with and without Ti were solution treated at 980 °C for 1 h and cooled by air coolingand water quenching, after which the specimens were aged at 500 °C. The two alloys showed differentaging characteristics with different cooling rates during the aging process. The conductivity of all alloysincreased during aging; for alloys that were water quenched, hardness increased at the early stage ofaging and then drastically decreased. The air-cooled Cu-Ni-Si alloy without Ti also experienced anincrease in hardness, which then decreased during aging, but the air-cooled Cu-Ni-Si alloy with Ti didnot show a drastic decrease in hardness during prolonged aging. A combination of yield strength andconductivity of 820 MPa and 42% IACS, respectively, was achieved in the air-cooled Cu-Ni-Si-Ti alloyafter solution treatment.
Cr 및 Zr 첨가가 Cu-6Ni-4Sn 합금의 인장 및 부식 특성에 미치는 영향
한승전,김상식,김기원,김창주 대한금속재료학회 2002 대한금속·재료학회지 Vol.41 No.2
The effects of Cr and/or Zr additions on tensile and corrosion behaviors of Cu-6i-4Sn alloy were examined. It was observed that the changes in microstructure and tensile properties of Cu-6Ni-4Sn alloy were not significant with the addition of 0.1 to 0.3% Cr and/or Zr in the present study. The resistance to pitting corrosion was, however, improved in 3.5% NaCl solution with particularly the addition of Cr and Zr. The passive films observed in Cu-6Ni-4Sn alloys with Cr and/or Zr addition appeared to be more stable than non-Cr and/or Zr containing counterpart. The mechanism(s) of the improved resistance to pitting corrosion for Cu-6Ni-4Sn alloy with the addition of Cr and/or Zr is discussed based on the experimental observations.