Behaviour of a maraging steel under quasi-static and dynamic compressive loading
by E. Lach, R. Schnitzer, H. Leitner, A. Redjaimia, H. Clemens
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 5, No. 1, 2010

Abstract: The class of stainless maraging steels exhibits an excellent combination of very high strength and hardness, ductility and toughness, combined with good corrosion resistance. Due to precipitation hardening 0.2% yield stress values of up to 2.4 GPa can be achieved. In many applications like crash worthiness or ballistic protection the materials are loaded at high strain-rates. The most important characteristic of material behaviour under dynamic loading is the dynamic yield stress. In this work, compression tests have been conducted at strain-rates of the order of 5 × 10⁻³ s⁻¹ up to 3 × 10³ s⁻¹ to study the materials behaviour. In order to investigate the influence of temperature, dynamic compression tests have been performed in the temperature range from −40°C to 300°C. The Johnson-Cook equation has been used to describe the materials behaviour under dynamic loading. From strain-rate jump tests the activation volume was determined in order to identify the dislocation mechanisms which control the thermally activated part of plastic deformation.

Online publication date: Sun, 04-Apr-2010

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