|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Environmental Degradation of Additively Manufactured Alloys
||Biocorrosion Response of Heterogeneous Microstructure in Laser Additively Deposited CoCrMo
||Sangram Mazumder, Selvamurugan Palaniappan, Mangesh V. Pantawane, Madhavan Radhakrishnan, Shreyash M. Patil , Narendra B. Dahotre
|On-Site Speaker (Planned)
Bio-corrosion response of laser-based directed energy deposited CoCrMo in simulated body fluid at physiological temperature (37 ℃) was investigated. The cellular-dendritic solidification with selective elemental segregation in CoCrMo fabricated using five different laser powers. Such microstructural evolution was attributed to the extremely rapid thermokinetics inherently associated with laser-based additive manufacturing. Bio-corrosion response in terms of potentiodynamic polarization and electro-impedance spectroscopy of the laser additively manufactured CoCrMo samples varied marginally, compared to a conventionally manufactured CoCrMo. However, significant difference in corrosion morphology characterized by spatially non-uniform corrosion was observed in laser additively manufactured CoCrMo, while a homogeneous corrosion was observed in conventionally manufactured CoCrMo. Heat treatment at 1150 ℃ for 150 minutes in Ar atmosphere eliminated the microstructural heterogeneity in laser additively manufactured CoCrMo samples rendering uniform corrosion characteristics. Also, enhancement in equilibrium potential was observed, attributed to the specific microstructural aspects after heat treatment of the laser additively manufactured CoCrMo.
||Additive Manufacturing, Other, Other