The influence of temperature and strain rate on the strengthening of metallic materials

• Autorzy: Kyzioł L.

Identyfikatory

DOI

10.5604/12314005.1213566

• Języki publikacji: PL

Abstrakty

EN

Extensive literature indicates that the effect of strengthening materials is related to their structural construction. The structure of the metallic material exhibits the greatest strengthening effect when there is a very limited movement of dislocations and their movement is completely blocked due to numerous obstacles [1, 3, 6-9, 12, 15, 16]. In this paper strain, rate and temperature dependences of yield strength of metallic materials are presented. The effect of temperature and strain rate on the value mechanical threshold stress is determined. In addition, the effect of temperature on the Kirchhoff modulus and Burgers vector is determined. The interaction of dislocations with grain boundaries causes additional stress – athermal stress causing the strengthening of the structure. The term “athermal” implies that thermal activation is unable to assist the dislocation past these obstacles. The strengthening of metallic materials is related to the dimensions of the grains, which influence the athermic stress. The calculations of mechanical threshold stress and other parameters of the structure of the material allow for easier understanding of the strengthening of the material loaded with temperature and strain rate. The largest strengthening occurs in pure metals and their alloys in the case of the total blocking of dislocation motion. This process takes place when the temperature is 0 K or at very high strain rates. The metal demonstrates the greatest effort, which is called mechanical threshold stress (MTS) [5].

Słowa kluczowe

EN

strengthening materials; dislocations; athermic stress; mechanical threshold stress (MTS)

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 1
• Strony: 199--206
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Kyzioł L.

• Gdynia Maritime University, Faculty of Marine Engineering Morska Street 81-87, 81-225 Gdynia, Poland tel.: [phone]

Bibliografia

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• [2] Bernsztejn, M. L., Zajmowskij, W. A., Struktura i własności mechaniczne metali, WNT, Warszawa 1973.
• [3] Cottrell, A. H., Theory of crystal dislocations, London 1964.
• [4] Dieter, G. E., Mechanical Metallurgy, 2nd ed., McGraw-Hill Series in Materials Science and Engineering, McGraw-Hill Book Company, New York 1976.
• [5] Follansbee, P. S., Fundamentals of strength, Wiley, New Jersey 2014.
• [6] Grabski, M. W., Kurzydłowski, K. J., Teoria dyslokacji, Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa 1984. [7] http://www.openaccesslibrary.com/index.php?id=97. [8] Hull, D., Dyslokacje, Wydawnictwo PWN, Warszawa 1982. [9] Kalinowska-Ozgowicz E., Strukturalne i mechaniczne czynniki umocnienia i rekrystalizacji stali z mikrododatkami odkształconych plastycznie na gorąco, Open Access Library, Vol. 2(20), 2013.
• [10] Kelly, A., Nicholson, R. B., Strengthening Methods in Crystal, John Wiley & Sons, Inc., New York 1971.
• [11] Kocks, U. F., Argon, A. S., Ashby, M. F., Thermodynamics and kinetics of slip, in Progress in Matrials Science, Vol. 19, Chalmers B., Christian J. W., Massalski T. B., eds., Pergamon Press, 119, Oxford 1975.
• [12] Kurzydłowski, K. J., Varin, R. A., Zieliński, W., Acta Metall, 32, 74, 1984.
• [13] Kyzioł, L., Determination of the mechanical threshold stress for example austenitic stainless steel 00H21AN16G5M4Nb (in press).
• [14] Kyzioł, L., Garbacz, G., Zależność wytrzymałości stali austenitycznej 0H18N9S od szybkości odkształcenia, Logistyka, 6, s. 6520-6528, 2014.
• [15] Reael, W. T., Dislocations in crystals, McGraw-Hill, New York 1953.
• [16] Varin, R. A., Wyrzykowski, J. W., Phys. Stat. Sol., 48, K79, 1978.
• [17] Varshni, Y. P., Temperature dependence of the elastic constants, Physical Review B, Vol. 2, No. 10, pp. 3952-3958, 1970.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.