Structure of diffusion layers formed at liquid aluminum alloy-steel contact boundary

The microstructure and composition of diffusion layers that arise upon the spread of the liquid aluminum alloys AL5, AL9, AL852, and A7075 over the St3 steel has been investigated using optical and electron microscopy. The thermophysical conditions of the interaction of the melt with the substrate under which at the boundary of the substrate the plastic transition layer of iron-based solid solution improving quality of the coating is formed have been determined. © 2013 Pleiades Publishing, Ltd

Structure of Fe-Cu-C alloys produced by contact alloying

The electron-microscopic analysis has been carried out in the Center of Electron Microscopy of the Institute of Metal Physics, Ural Division, Russian Academy of Sciences.A qualitative and quantitative analysis of the structure of Fe-Cu-C alloys obtained as a result of interaction of Fe-Cu melts with graphite upon wetting has been carried out by means of optical and electron microscopy. Based on the investigations performed, it has been shown that the technique of contact alloying allows one to obtain multilayered composite materials

Structure of Fe-Cu-C alloys produced by contact alloying

The electron-microscopic analysis has been carried out in the Center of Electron Microscopy of the Institute of Metal Physics, Ural Division, Russian Academy of Sciences.A qualitative and quantitative analysis of the structure of Fe-Cu-C alloys obtained as a result of interaction of Fe-Cu melts with graphite upon wetting has been carried out by means of optical and electron microscopy. Based on the investigations performed, it has been shown that the technique of contact alloying allows one to obtain multilayered composite materials

Effect of Homogenizing Heat Treatment of Liquid Aluminum-Copper Alloys on the Structure of Rapidly Crystallized Specimens

Centrifugal casting into a massive slot chill mold was used to prepare two series of specimens of alloys of the Al - Cu system, containing from 10 to 32.2 at.% Cu. The first series was fabricated without a homogenizing heat treatment of the melt, while the second series was fabricated with heating of the melt to 1400A degrees C. Both kinds of specimens were cast at the same temperature in order to provide for the same cooling rate of about 10(4) K/sec. The structures, phase compositions and microhardnesses of the structural components are compared. It is established that the homogenizing heat treatment changes the kinetics of crystallization and, hence, the proportion of phases in the alloy structure and the copper content in them

Effect of Homogenizing Heat Treatment of Liquid Aluminum-Copper Alloys on the Structure of Rapidly Crystallized Specimens

Centrifugal casting into a massive slot chill mold was used to prepare two series of specimens of alloys of the Al - Cu system, containing from 10 to 32.2 at.% Cu. The first series was fabricated without a homogenizing heat treatment of the melt, while the second series was fabricated with heating of the melt to 1400A degrees C. Both kinds of specimens were cast at the same temperature in order to provide for the same cooling rate of about 10(4) K/sec. The structures, phase compositions and microhardnesses of the structural components are compared. It is established that the homogenizing heat treatment changes the kinetics of crystallization and, hence, the proportion of phases in the alloy structure and the copper content in them