The main goal of this study was to develop a new processing technology for a high-strength low-alloy (HSLA) steel in order to maximize the mechanical properties attainable at its low alloy levels. Samples of the steel were processed using thermal deformation schedules carried out in single-phase (γ) and dual-phase (γ + α) regions. The samples were rolled at unconventional finishing temperatures, their final mechanical properties were measured, and their strength and plasticity behavior was analyzed. The resulting microstructures were observed using optical and transmission electron microscopy (TEM). They consisted of martensite, ferrite and (NbV)CN precipitates. The study also explored the process of ferrite formation and its influence on the mechanical properties of the material.
Since the field of cryogenic applications and testing has become very valuable, demand for material specification and improvements in this area has increased as well. One of the possibilities for the characterisation of cryogenic materials with a wide range of tests can be found at the Cryogenic Material Test Facility Karlsruhe (CryoMaK), within the Institute of Technical Physics (ITEP) at the Karlsruhe Institute of Technology (KIT). Skills, knowledge and best practices, related to cryogenic testing, have been developed by CryoMaK for over 30 years. The facility provides a possibility of measuring mechanical, electromechanical and thermal properties of materials and components. Further it is possible to measure tensile force (F), critical magnetic field (Bc) and critical current (Ic) to examine the quench behaviour of superconducting current cables. This article describes new facilities as well as possibilities in relation to testing in CryoMaK.
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