AISI 4340 steel is one of the super strong steels that can be selected for different applications. By designing the proper cycles of heat treatment, the optimum microstructure and properties of this steel can be achieved. In this study, different heat treatment cycles were introduced to achieve the optimum microstructure and improve the mechanical and magnetic properties of AISI 4340 steel. The...

Purpose. Production of steel with controlled austenitic transformation during operation the 4Х4Н5М4Ф2 grade (without forging treatment) using technology electroslag remelting and establishing optimal modes heat treatment (annealing, quenching tempering). tools (matrices) from for hot deformation aluminum alloy at operating temperatures below critical point A1.
 Research methods. Metallogra...

The smart-darting algorithm is a Monte Carlo based simulation method used to overcome quasiergodicity problems associated with disconnected regions of configurations space separated by high energy barriers. As originally implemented, the smart-darting method works well for clusters at low temperatures with the angular momentum restricted to zero and where there are no transitions to permutation...

Compacted graphite iron (CGI) is a critical material in today's automotive and manufacturing industries. Heat treatment processes can improve CGI wear properties, related primarily to microstructural changes. In this study, single double tempering heat treatments were used the properties of CGI. Oil quenching was performed after 90 minutes austenitization at 900°C, followed by 60 three differen...

Softening frequently occurs in dual-phase steels under isothermal tempering of martensite. Recently, non-isothermal tempering is implemented to decrease the softening process in dualphase steels. Here, we have discovered using high power electropulsing treatment can significantly enhance the strengthening effects via the formation of ultrafine-grained ferrite with nano-cementite particles in te...

Using Cr-bearing low-alloy steel is an effective preventive measure for marine structures, as it offers superior corrosion resistance when compared to plain carbon steel. However, remains unclear how quenching and tempering heat treatment, which commonly applied reinforcement in some specific environments improve its mechanical properties, affects resistance. In the present work, impact of trea...

Abstract Vanadis 6 cold work tool steel was vacuum austenitized, room temperature quenched, differently cryogenically treated (-75, -140 and -196 °C for different durations) double tempered, at temperatures of either 170 or 530 °C. Galling resistance assessed by pin-on-disc testing specimens against CuSn bronze, wide ranges sliding velocities loads. The obtained results show that cryogenic trea...

We show that the acceptance probability for swaps in the parallel tempering Monte Carlo method for classical canonical systems is given by a universal function that depends on the average statistical fluctuations of the potential and on the ratio of the temperatures. The law, called the incomplete beta function law, is valid in the limit that the two temperatures involved in swaps are close to ...