Plastic Instability of Tanatalum Single Crystals Compressed at 4.2K
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概要
- 論文の詳細を見る
Serrations due to slip were observed on the stress-strain curves of zone-refined tantalum single crystals compressed at 4.2K. It was found on an oscillograph that each rapid stress drop was accompanied by a rapid temperature rise of about 40K. This suggests that a discontinuous slip is caused by the plastic instability due to the heat generated during the deformation. Using a deformation model involving a temperature rise due to the work done, calculations of the stress-strain curve and the corresponding temperature change were made for the present crystal, which gave a rapid stress drop and a rapid temperature rise in agreement with the experiments within a factor of 1.5. The present calculation shows that shows that no triggering action is necessary for the initiation of a discontinuous stress drop. A criterion for the thermal instability to occur was also discussed.
- 社団法人日本物理学会の論文
- 1973-05-05
著者
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KURAMOTO Eiichi
The Institute for Solid State Physics, The University of Tokyo
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TAKEUCHI Shin
The Institute for Solid State Physics, The University of Tokyo
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Suzuki Taira
The Institute For Solid State Physics The University Of Tokyo
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Kuramoto Eiichi
The Institute For Solid State Physics The University Of Tokyo
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Takeuchi Shin
The Institute For Solid State Physics The University Of Tokyo
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