切りくずの変形機構ー体心立方系の場合
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概要
- 論文の詳細を見る
Mechanical inspections and electron micrographic observations have been carried out on the shaped specimens from the chips of iron (0.009%C) and S15C steel. It is expected that the informations on the deformation structure and properties of the material after heavy straining under very high rate of strain can be derived from the experiments. The results are shown in brief. 1) The top of the iron chip shows itself in wavy lamellae piled up in the cutting direction. 2) Tensile specimen of the chip failed in brittle feature apparently, while the steps of slip plane can be found in the narrow zone at the edge of fracture surface. 3) The fracture surface comprises about 20～30% of dimple pattern and 70～80% of rather flat area. The dimple pattern with a diameter of about 0.3μ implies the generation of a large number of microcracks in heavily strained zone. 4) The flow stress of the chip, being different from the case of small amount of strain by conventional dynamic testing, is not always smaller than that of the specimen with the corresponding strain by compressing statically. 5) Electron micrographs on the etched surface of sectioned chip are characterized by lamellae with uniform spacing, which are not observed in the deformed specimen compressed statically. This implies in comparison of cutting with uniaxial straining that it is difficult to consider the workhardening to be independent of the deformation path.
- 山形大学の論文
- 1975-02-20