洋白圧延材の異方性と低温焼鈍効果

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タイトル別名
  • Anisotropies and Low-Temperature Annealing Effect in Cold-Rolled Nickel Silver
  • ヨウ ハク アツエンザイ ノ イホウセイ ト テイオン ショウドン コウカ

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抄録

The changes in hardness, elastic modulus and bending deflection with the rolling reduction and low-temperature annealing of nickel silver were measured on the specimens cut out parallel and transverse to the rolling direction of the sheet. And the results were considered in relation to the rolled structure.<BR>The anisotropies become more remarkable as the rolling reduction exceeds 50%, and in this region, the measured values are always higher in the transverse direction than in the parallel direction. Perhaps, this may be due to the development of the rolling texture in the face-centered cubic system and to the appearance of the flaw-like strain markings developed transverse to the rolling direction. The low-temperature annealing increases the values of hardness and elastic modulus to attain the maximum values at 350°C. Also, the greater the rolling reduction is, the higher the increasing ratio becomes. The change in hardness due to the low-temperature annealing is greater as the grain size reduces, wherease the change in elasticity is hardly affected by the grain size. The process of anneal-hardening at each temperature does not show the two-stage hardening which has been observed in the α-brass sheet, but follows a simple and smooth process.<BR>No difference can be observed between the as cold-rolled and as anneal-hardened microstructures, although some structural changes of a kind of polygonization have been found in α-brass after low-temperature annealing. The results of bending deflection test correspond with those of elastic modulus.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (8), 476-482, 1964

    公益社団法人 日本金属学会

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