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Studies concerning the modification of longitudinal elastic modulus and logarithmic decrement while heat treating C45 steel

M. A. LUCA1,* , T. MACHEDON2

Affiliation

  1. Post-doctorate Research Department “Universitatea Transilvania Brasov”B-dul Eroilor Nr.29, Brasov500036, Romania
  2. Faculty of Science and Materials Engineering ”Universitatea Transilvania Brasov” ”B-dul Eroilor Nr.29, Brasov500036, Romania

Abstract

The knowing of the thermo dynamical conditions, the mechanism and kinetics of the transformations suffered by Austenite on cooling and by Martensite on heating, represents the fundamental issue of heat treatment theory and practice. The evaluation of the results obtained after the transformations of Austenite on cooling, respectively analysis of the resultant structures, is usually made by mechanical testing (hardness, traction, resilience) and metallographic analysis. The main issue of the present article is the modification analysis of the dynamic elastic modulus, internal friction, hardness and resilience, suffered as a consequence of the normalizing, hardening and tempering of carbon steel C45 (OLC 45) appliance..

Keywords

Internal friction, Logarithmic decrement, Heat treatment, Vibration, Elastic modulus.

Submitted at: Nov. 10, 2010
Accepted at: Feb. 17, 2011

Citation

M. A. LUCA, T. MACHEDON, Studies concerning the modification of longitudinal elastic modulus and logarithmic decrement while heat treating C45 steel, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 2, pp. 106-110 (2011)