Cu-Ni-Al合金の加工熱処理に及ぼすTi添加の影響

概要

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The improvement of mechanical properties by a thermomechanical treatment (TMT) has been investigated on a Ti-added Cu-Ni-Al alloy. Characteristics in microstructure and rolling texture were examined in relation to the mechanical properties. In the thermomechanically treated Cu-Ni-Al-Ti alloy, the hardness, 0.2% proof stress and ultimate tensile strength reached the maximum values of 275 Hv, 120 kg/mm^2 121 kg/mm^2 respectively. These values were much higher than those obtained in similarly treated Cu-Ni-Al alloys. The hardness increment of 100 Hv obtained by cold rolling for the Cu-Ni-Al-Ni alloy was extremely higher than that of 60 Hv for a Cu-Ni-Al alloy. The transmission electron microscopy of the presaged and cold rolled Cu-Ni-Al-Ti alloy indicated that deformation proceeded only in matrices and the concentrated stress in matrices leads mechanical twinning. X-ray pole figures on 1111 reflection showed that the rolling texture was changed into an alloy type from a pure metal type observed in a Cu-Ni-Al alloy.
社団法人日本材料学会の論文
1988-09-15