延性金属の一様ひずみに及ぼす降温プロセスの影響
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概要
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An analysis on plastic instability theory together with some constitutive equations involving strain, strain rate and temperature leads to simple conclusion, which suggests an increase of uniform strain range by falling off temperature intentionally during the process. To evaluate the above prediction, the concept of temperature descent is provided and the usefulness of cooling down with the process temperature is shown by the comparison with constant temperature. Experiments were carried out in uniaxial tensile test, methods of cooling with using natural cooling and air blow cooling. It was observed that temperature descent during forming process causes a significant rise of the uniform strain. In the case of air blow cooling, significant increase of uniform strain was seen because temperature descent rate was larger than natural cooling. The result may be applied to any other metal, being independent of metal class, thus generalized concept seems to be reached to extension in uniform strain range of metals with poor formability.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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