Changes in Structural Characteristics of Hypoeutectic Al-Si Cast Alloy after Age Hardening

INFLUENCE OF LASER SURFACE HARDENING ON CORROSION PROPERTIES OF Al-Zn-Si CAST ALLOY

E. Tillová, L. Kuchariková, M. Chalupová, J. Belan, A. Vaško, I. Švecová, University of Žilina, Faculty of Mechanical Engineering, Slovak Republic This work is focused on the effect of the laser surface treatment (laser power 50 and 80 W) on microstructure and corrosion properties of self-hardened AlZn10Si8Mg cast alloy used for engine and vehicle constructions. The electrochemical impedance sp...

Enhanced Age Hardening in an Al-Mg-Si Alloy Using High-Speed Compression

The age hardening of an Al-Mg-Si alloy was enhanced by the effect of high-speed (105 s11) compression prior to aging. This enhancement of the age hardening is brought about by the formation of vacancy clusters during high-speed compression. High resolution transmission electron microscopy reveals that these vacancy clusters form stacking fault tetrahedra. Following peak aging, vacancy clusters ...

THE INFLUENCE OF DRY SLIDING ON PRCIPITATION HARDENING BEHAVIORS OF Al-Cu-Si ALLOY

Abstract: Cold working performed before an aging treatment has a significant effect on size and amount of precipitate produced. This could be caused by the increase in defect density, such as vacancies and dislocations. In this research, the Al-Cu-Si alloy was solution-treated, wear-tested and then artificially aged for a period of 1–5 h. Changes in the amount of precipitate, in the lattice par...

Precipitation Hardening of Al–Si–Mg Alloys

Morphological and Thermal Flux Analysis in as-Cast Al Alloy after Swarf Addition

In this research, effect of swarf addition on the microstructure of die cast aluminum A380 alloy and the possibility of altering the alloy structure in the metallic die has been studied. The microstructure mainly consists of the α-phase, eutectic, intermetallic compounds and porosity. Since the alloy solidifies under non-equilibrium conditions, the Scheil equation with exact amount of equilibri...