SEARCH RESULT

In this study, the effect of C addition on the corrosion behavior of wire rods of 5.5 mm in diameter was investigated. The horizontal and vertical cross sections of the wire rods with 0.7, 0.8, 0.9 C ratio were taken during the metallographical process. The microstructure of the examined specimens was examined by light optical (LOM) and scanning electron microscopy (SEM). Hardness test of steel containing 0.7- 0.9 C was carried out in shimadzu brand micro hardness tester. Corrosion tests of the prepared samples were evaluated according to both the weight loss and the Potentiodynamic Polarization measurements in 3.5% NaCl solution. Despite the increased hardness of the specimens examined, the corrosion resistance decreased. This can be caused by inclusions in the microstructure.

International Iron & Steel Symposium
UDCS

Medine Kilinc Gulheser Dogancik Yunus Türen Yavuz Sun Hayrettin AHLATCI İbrahim AFŞAR Serhat ÖZDEMİR Hüseyin Koymatcık Hüseyin Zengin

In this study, the effect of homogenization heat treatment on the corrosion behaviour and mechanical properties of Co-Cr (Dental), Co-Cr (Denture) and Ni-Cr (Dental) based casting materials used as dental implant materials was investigated. Samples prepared as 7 mm in diameter x 10 mm cylindrical in a special silicon-graphite-containing powder mixture for preventing oxidation were annealed at different times in the range from 0.5 to 3 hours at 1000 ° C. Microstructural investigations of the samples heat treated and casted was performed on longitudinal and circular sections by Leica DM ILM model optical light microscope and then hardness measurements were carried out with Brinell hardness tester with 2,5 mm ball and 187,5 kg load. The corrosion behaviour of the Co-Cr and Ni-Cr based materials formed in the optimum parameters, which show improvement in the final mechanical properties of microstructure and hardness measurement data, compared with cast materials, was studied by potentiodynamic polarization test in Hanks liquid. The corrosion damage mechanism was determined by scanning electron microscopy. The icorr and Ecorr values of the heat-treated materials evaluated after the corrosion made by the potentiodynamic polarization test method has been increased with respect to that of the casted materials.

International Conference of Advanced Materials and Manufacturing Technologies
ICAMT

Medine Kilinc Batuhan Ozusta Gulheser Dogancik Canan Dursun Hayrettin AHLATCI Yunus Türen Yavuz Sun Alperen R.B. ÖZSARI