Yield Points and Transient Creeps in Polycrystalline Iron of Very Low Carbon Content
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概要
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The time-dependent plastic properties in wet-hydrogen-treated iron were observed at -78℃. The stress-strain curves at various strain rates showed gradual yield drops at yield point and no inhomogeneous deformation i. e. Luders band. The creep curves showed an exponential rise of plastic strain at an early period of creep. Observed results were analysed by the strain rate equation, ε^^・=bnw. The magnitude m in the dislocation velocity-stress relation, v^∞σ^m, is obtained to be about 10 from the stress sensitivity of strain rate at a constant strain. It is concluded that the upper yield stresses in the present experiment are not closely relatated to the stress required to unpin dislocations.
- 社団法人日本物理学会の論文
- 1963-04-05
著者
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Ikeda Shozo
National Nesearch Institute For Metals
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Takeuchi Tomoyuki
National Research Institute For Metals
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Takeuchi Tomoyuki
National Nesearch Institute For Metals
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Takeuchi T.
National Research Institute for Metals
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