The Effect Of Process Combination Of Blasting and Oxidation Towards Hardness And Corrossion Rate of Ti-6Al-4V Material

• Main Author: Triprabowo Saksono - Nim: 13713006 , Bintang
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21445
• Institution: Institut Teknologi Bandung

Currently, titanium is increasingly being used in aviation, chemical industry, biomedical, and others. This is due to the superior titanium nature of having a high specific strength, good corrosion resistance, low density, etc. So it is suitable for materials that require good mechanical properties. However, compared to other metallic materials, titanium has low surface wear resistance. Because of that, surface treatment that can improve titanium wear resistance without changing its microstructure is needed. This study aims to determine the effect of combination of blasting and oxidation process on microstructure, weight change, hardness, and corrosion rate on Ti-6Al-4V material. In this research, the process of entering oxygen into the material by sandblasting material and then heated at 850oC temperature with varying time that is 1 day, 2 days, and 3 days with each day there are 4 cycles between sandblasting and heating. During the heating process, checking the weight changes in the material in each cycle is done. After heat treatment, hardness testing was performed using MicroVickers hardness testing with hardness measurements at each material depth. The three specimens experienced an increase in hardness from the initial condition without treatment. In the 3-day heating process, hardening with maximum depth and highest hardness is 318HV. But the best corrosion resistance is obtained by specimen with 2 day heating with the corrosion rate is 0.1059 mpy. Furthermore, one of the specimens was performed by SEM and EDS to determine the oxide layer formed and the oxygen content of the sample at each depth.