Diffusion of nitrogen in plasma nitrided iron and structural evolution during the nitriding process were evaluated by several characterization techniques including optical microscopy (OM), microhardness depth profiling (HDP), scanning electron microscopy (SEM), x-ray diffraction (XRD), glow discharge optical emission spectroscopy (GDOES), and secondary ion mass spectroscopy (SIMS). Plasma ni...

One of the major issues required to be dealt with the casebased reasoning (CBR) is the challenge to meet to maintain and control the correctness and accuracy of the results expected to be produced against the proposed algorithm and methodology for the candidate CBR system. This paper introduces a computational model with the assistance of the concept of Regression fitting within the mathematica...

In this paper, nitrogen diffusion is investigated in single-crystalline austenitic stainless steel during modified layer formation and thermal annealing. A generalized system of equations derived within a thermodynamic framework from Fick’s laws, which describe flux under multiple driving forces, including concentration gradient the hydrostatic stress. Trapping detrapping phenomena are consider...

The characteristics of the non-uniform glow discharge with the effect of the hollow cathode (EHC), on which the chosen regimes of nitriding the surface of titanium alloy VT6 are considered. Experimental results of the influence of inhomogeneous plasma in a pulsed regime of processing on the structure and microhardness of the treated surface are resulted.

The precise control of nitrogen content in high martensitic stainless steel is the guarantee its excellent performance, and a crucial issue for manufacturing process using pressurized gas nitriding. In this paper, effects pressure, temperature alloy composition on solubility nitriding kinetics Fe–Cr–Mo–C melts were investigated. order to correct deviation from Sieverts’ law under first- second-...

In order to improve the low hardness and poor wear resistance of TA2, this paper proposes a composite process cold-rolling low-temperature plasma nitriding with recrystallization. This modification can effectively achieve dual goals modifying matrix structure surface TA2 alloy simultaneously. The experimental results indicate that when deformation rate increases, small-sized grains in sample in...

It is known that nitro-oxide coatings were developed based on nitriding, which are obtained using a two-stage technology consisting of nitriding at the first stage process and vaporization second stage. Such processing provides high physical mathematical characteristics hardened parts. This technological was improved by us due to preliminary oxidation, made it possible accelerate production nit...