Formation of composite structure of amorphous alloy after treatment of different types

Abstract

Abstract. The dependence of structure and microhardness of aluminium amorphous alloy were investigated and determined on samples after deformation, heat treatment and irradiation with fast carbon ions. IntroductionAluminum alloys are widely utilized as light, high-strength, temperature-resistant and corrosionresistant materials for aviation and aerospace equipment. Aluminum doping with transition and rareearth metals allows to receive amorphous structure during highspeed quenching from liquid state. Amorphous structure is an intermediate stage for amorphous-nanocrystalline composites preparation. Different methods of such structures preparation are known: heat treatment, severe plastic deformation (SPD), pulsed photonic irradiation, laser irradiation, radiation exposure. Ample quantity of scientific work is devoted to amorphous nanocrystalline structures preparation methods consideration. In such a way high deformation rates in event of severe plastic deformation [1-5] provide fine grained structure in alloys including nanoscale multiphase structure with increased strength performance. Scientific work results issued over the last years give an evidence of intense interest both to the new aluminum alloys development and to the formation behavior research of submicro-and nanocrystalline structures in the aluminum-based alloys doped with transition and rare-earth metals [3][4][5][6][7][8][9][10][11]. Amorphous alloys irradiation by high-energy ions is reviewed as one of the nanocrystalline composites preparation methods. Information presented in scientific literature about irradiation influence on amorphous alloys structures is limited and commonly contradictory, irradiation parameters vary in types of particles, energies and fluence.Amorphous alloys structure modification is considered now as a method of simultaneous mechanical properties (such as strength and ductility) enhancement. As aluminum alloys doped with transition metals are embrittled due to bulk large-sized intermetallic compounds allocation, best available compositions pulverization technology development is an actual task for research studies.

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

“…Since the volume fraction of the eutectic particles is close in all alloys-9-11%, the alloys differ mainly in the properties of the eutectic. The hardness of particles increases in the following order: Al 11 Ce 3 , Al 11 La 3 , and Al 3 Ni-3.5, 4.0, and 7.0-7.7 GPa, respectively [5,[36][37][38]. In this case, the particle refinement process can occur simultaneously with the structure formation during SPD.…”