The influence of defects on the quality of the wrought aluminum alloys

Objective. Study of the effect of internal defects on the properties of the deformed billets of aluminum alloys. Material. As the material for the present study were selected wrought aluminum alloys B95 system Al?Zn?Mg?Cu and 01570 of the system Al?Mg?Sc. Methods. Investigated internal defects arising during deformation in the semis, grain structure, methods of improvement of billets and mechanical properties of aluminium alloys after processing, refining additives and a complex modifier based on silicon carbide. Results. Conducted complex research has shown the active influence of the method of obtaining blanks of semi-finished products on the occurrence of internal defects. In this case, the least amount of internal defects detected during electro refining and modification of nanodispersed refractory particles. Received a more dispersed structure of alloys 01570 B95 and that leads to increasing of complex of mechanical and technological properties. Scientific novelty. For aluminum alloys, the relation between the processing of the melt (refining, modification) and the formation of internal defects in workpieces. Practical significance. Understanding of the causes of the formation of internal defects and methods of their elimination, will allow you to control the structure and the complex technological and mechanical properties, enhancing the quality and yield of rolled products.