SEARCH RESULT

Because Al-Sc alloys are used extensively in the industry due to their many properties, both theoretical and experimental researchers are interested. The importance to these alloys is the physical and chemical properties they exhibit at lower proportions of Sc additives. We also obtained Al-1.1Sc and Al-1.9Sc alloys using a special method. By doing XRD analyzes at room temperature, we reached the conclusion that both alloys crystallized in the same 225 space group and fcc structure. We calculated the second-order elastic constants using the knitting parameters obtained from the EMTO program. In this study, by using XRD test results and theoretical calculation results; (hkl) in the crystal planes defined by Miller indices; peak widths, crystal dimensions, dislocation densities, Young's constants and Maximum Stresses were examined separately. It is seen that the physical parameters (hkl) change according to their planes in the result of the study done. In particular, the maximum stress and Young's modulus were found to be mechanically better for the strength of the Al-1.1Sc alloy.

International Symposium on Light Alloys and Composite Materials
UHAKS

Hamza Yaşar Ocak Rahmi Ünal Gencer Sarıoğlu Şule Uğur Gökay Uğur

To calculate the anisotropies of Al-Sc alloys under high pressure, second order elastic constants obtained using density functional theory calculations implemented in WIEN2K software package. Elastic constants of cubic fcc Al-1.1Sc and Al-1.9Sc alloys obtained as a function of pressure. Elastic constants of both alloys were observed to have subtantially changed with pressure. Pressure based elastic constats were used to calculate the elastic anisotropy (A) and anistropy (ACNNF) that was used to define the center next nearest exhange correlation parameters. It was observed that both anisotropy parameters were changed according to Sc content and pressure. And at increasing values of pressure they approach each other. What makes this study speacial is that this is the first time that anistropies of Al-Sc alloys as function of pressure is investigated.

International Symposium on Light Alloys and Composite Materials
UHAKS

Hamza Yaşar Ocak Gencer Sarıoğlu Salih Akbudak Gökay Uğur Şule Uğur