This paper reports on the precipitation behaviour and microstructural evolution in ~20% cold rolled NbMoV and V single microalloyed low carbon steels during intercritical annealing. The microstructure and precipitation behaviour were studied by optical and scanning/transmission electron microscopy and microanalysis, X-ray diffraction technique and Vickers hardness testing. After intercritical a...

Carcinogenic heavy metal chromium, in its hexavalent form (Cr(VI)), is spuriously used in various industrial operations because of its hardness and stability and is found in industrial effluents in concentrations much above WHO’s prescribed limit (50 mg/L). Conventional methods for removing toxic chromium ion (by chemical reduction followed by precipitation, ionexchange and adsorption on activa...

The effects of Cr and Ni on three different types steel with carbon ratios under constant conditions such as the welding current 120A, voltage 80V, Diameter 10 mm angle 60 degree was observed. Nickel percentage up to 0.147% Chromium 0.083% contributed affecting mechanical properties steel. Undissolved carbide particles refine austenite grain size. In presence nickel, chromium is less effective ...

Formation and evolution of a carbide superlattice (SL) during C deposition on Mo have been studied using molecular beam epitaxy techniques. The ordering of the SL is energetically driven, such that the interplay between strain and surface energies determines the length scale of the SL. Surface precipitation of C occurs within a narrow range of SL spacing that appears to control the size and spa...

Abstract Inconel 625 alloy is a nickel-based deformation superalloy which widely used in aviation, ocean engineering, chemical engineering and other important fields. In recent years, with the continuous expansion application field of alloy, requirements mechanical properties, corrosion resistance comprehensive properties are constantly improved. this paper, hardness tester, tensile machine, el...

Chromium-carbon films were deposited by utilizing reactive high-power impulse magnetron sputtering with different mixture ratios of ethyne and argon a constant deposition total pressure while the temperature, pulse frequency, duty cycle average power chromium cathode remain same. The microstructure chemical bonding obtained within composition compared. results show that increasing ratio, carbon...

The precipitation, coarsening and reversion of carbides can determine the quality of steels. This paper is a review of efforts towards better, practical theory for all of these solid–state reactions.

The influence of precipitates and dislocations on the acoustic nonlinearity was investigated in isothermally aged ferritic CrMo steel and low cycle fatigued copper. The variation in the normalized acoustic nonlinearity parameter (β/β0) was interpreted as resulting from microstructural changes supported by the electron microscopy. The β/β0 of CrMo steel increased abruptly in the initial stage of...