Engineering Transactions, 12, 3, pp. 455-467, 1964

Wpływ Prędkości Odkształcania na Krzywa Umocnienia dla Aluminium

J. Klepaczko
Zakład Mechanik Ośrodków Ciągłych Instytutu Podstawowych Problemów Techniki PAN
Poland

The paper presents experimental results obtained with aluminium tube test pieces subject to torsion at fixe different rates ranging from tgy = 1,66-10-5 1/sec to tgy = 0,624 1/sec. The tests have been performed by means of a special machine constructed at the Plasticity Group of the IPPT.
As a result of experiments the influence of strain-rate on the strain-hardening curve has been found to be nonexisting in a certain velocity range. Empirical relations have been obtained describing this phenomenon. The paper contains also a brief discussion of the results obtained from the viewpoint of tests by other authors and that of physics of metals.

Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

H. A. LEQUEAR, J. D. LUBAHN, Some transient effects during creep and tensile of an aluminum alloy, Trans. AIME, 206 (1956), 497.

J.D. LUBAHN, R. P. FELGAR, Plasticity and Creep of Metals, J. Wiley, New York-London 1961.

C. W. McGREGOR, J. C. FISHER, Tension tests at constant true strain rates, J. Appl. Mech., 4, 12 (1945), A-217.

D. McLEAN, Mechanical Properties of Metals, J. Wiley New York-London 1962.

M.J. MANJOINE, Effect of rate of strain on the flow stress of gas turbine alloys at 1200 and 1500°F, Proc. ASTM, 50 (1950), 931.

A. NÁDÁI, J. MANJOINE, High speed tension tests at elevated temperatures, J. Appl. Mech., 2, 8 (1941), A-77.

A. NADÁI, Theory of Flow and Fracture of Solids, Vol. II, McGraw Hill, New York-London 1963.

D. F. STEIN, J. R. Low, Mobility of edge dislocations in siliconiron crystals, J. Appl. Phys., 2, 31 (1960), 362.

F. WEINBERG, Grain boundaries in metals, Progress in Metal Physics, Vol. 8, Pergamon Presss, 1959.

[in Russian]

[in Russian]

[in Russian]