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Development and manufacturability of magnesium matrix in-situ composite.

Development and manufacturability of magnesium matrix in-situ composite.

Date7th Jul 2022

Time03:00 PM

Venue Through Google Meet: https://meet.google.com/zwq-vuvw-rtt

PAST EVENT

Details

Magnesium (Mg) and it’s alloys possesses exceptionally low density, high specific strength, good castability, good machinability and better biocompatibility, which can meet the desired requirements for energy saving and CO2 emission reduction in automotive and aerospace industries. However, there are still limitations in wide range of structural application for Mg alloys due to low strength, low elastic modulus, poor ductility, tension to compression yield asymmetry and poor corrosion resistance. Introduction of in-situ reinforcements is an effective approach to overcome these limitations of Mg alloys. The in-situ TiB2 reinforced ZE41 Mg matrix composite was successfully developed with varying reinforcement weight fraction by a novel liquid state processing route. The microstructural observation showed reasonable uniform distribution of in-situ TiB2 particles with average particle size of 765 nm. There was a significant enhancement of strength and grain refinement with the addition of TiB2 particles. The effect of in-situ TiB2 particle on Young’s modulus and strengthening mechanisms were established via theoretical and experimental investigations. To develop any engineering structural components from in-situ TiB2/ZE41 composites, secondary bulk forming processes like rolling, forging or extrusion are necessary. All these processes are dependent on compressive stress, strain rate and deformation temperature. Therefore, it is necessary to optimize these process parameters to achieve defect free industrial products with desirable microstructural properties. So, the manufacturability of the developed composite was studied by establishing processing map through uniaxial compression test at different temperatures (250-450 oC) and strain rates (10-3 to 10 s-1). The workability and instability domains were identified for base and composite materials. The hot deformation mechanisms were established through microstructural observation and mathematical modelling based constitutive analysis.

Speakers

Mr. Sushanta Kumar Sahoo (ME16D003)

Department of Mechanical Engineering