A Mechanism of Deformation of Metals at High Temperatures with Special Reference to the Tension Test and the Creep Test

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概要

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• The three kinds of characteristic functions in the deformation theory of the authors, i.e. strain rate function, work hardening function, and rate of recovery, were determined for 0.14 percent carbon steel from the results of the constant strain rate tension tests at a temperature of 450℃. These functions were compared with those determined from the data of the constant stress creep tests. It was found that the agreement between them was satisfactory. The relations of strain rate to elapsed time in the constant stress creep tests under several stress levels were predicted by the theory using the three characteristic functions determined independently of the results of the creep tests. The predicted relations were in good agreement with the experimental ones. The characteristic functions determined were discussed on the basis of metal physics, and were interpreted from the knowledge of behavior of both dislocations and vacancies. It is concluded that the behavior of the mild steel at high temperatures could be predicted by the present theory, if a proper form of each characteristic function were given.

• 一般社団法人日本機械学会の論文

著者

• Ohji Kiyotsugu

  Department Of Mechanical Engineering Faculty Of Engineering Osaka University

• Taira Shuji

  Department Of Mechanical Engineering Faculty Of Engineering Kyoto University.

• Tanaka Kichinosuke

  Department Of Aeronautical Engineering Faculty Of Engineering Kyoto University.

• Ohji Kiyotsugu

  Department of Mechanical Engineering and Systems, Graduate School of Engineering, Osaka University

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• Prediction of Growth Rate of Short Fatigue Cracks : Series A : Solid-Mechanics, Strength of Materials
• Near-Threshold Fatigue Crack Growth Behavior of SUS304 Steel at High Temperatures Using Interferometric Strain/Displacement Gage : 2nd Report, Fatigue Crack Growth Behavior
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• IDENTIFICATION OF AN INTERFACE CRACK IN BONDED DISSIMILAR MATERIALS FROM ELECTRIC POTENTIAL DISTRIBUTION
• Evaluation of the J-Integral Range of Fatigue Crack Emanating from Notches by Simple Estimation Formulae
• Investigation on Path-Integral Expression of the J-Integral Range Using Numerical Simulations of Fatigue Crack Growth
• INVERSE PROBLEMS IN SOLID MECHANICS AND RELEVANT FIELDS
• Effect of Stress Reduction of Secondary Creep of Mild Steel
• Creep of Mild Steel under Periodic Stresses of Rectangular Wave : (III) Prediction of the Creep Deformation under Periodic Stresses
• Creep of Mild Steel under Periodic Stresses of Rectangular Wave : (II) Creep Deformation under Unsymmetrical Periodic Stress Waves
• A Mechanism of Deformation of Metals at High Temperatures with Special Reference to the Creep after a Sudden Change in Stress
• A Mechanism of Deformation of Metals at High Temperatures with Special Reference to the Tension Test and the Creep Test
• Creep of Mild Steel under Periodic Stresses of Rectangular Wave

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