K. Raghukandan

Energy Kinetics in Explosive Cladding of Dissimilar Metals with Interlayer

In explosive cladding, the kinetic energy spent at the dissimilar interface transformed into thermal energy and characterizes the quality of clad. Explosive cladding with interlayer enhances the kinetic energy utilization and restricts the intermetallic formation. The introduction of interlayer increases the heat transfer area and duration of collision and, consequently, the time available for thermal energy transferred into the metals. The thermal energy is transferred to the participant metals by conduction and convection. The influence of interlayer between flyer and base plates on weldability window, an analytical estimation is also reported.

Processing and Microstructure of Magnesium In Situ Composite with Titanium and Boron Based Reinforcement

The present work is aimed to investigate the in-situ TiB/TiB2 particle formation in Mg and Mg-Al alloy via the chemical reaction between Mg, Al, K2TiF6 and KBF4. The feasibility to produce the Mg and Mg-Al matrix with in-situ TiB2 and TiB particles have been studied with respect to processing parameters. The XRD, optical microscopy and SEM-EDX analyses have been carried out on the synthesised composites. Significant improvement in the hardness values are obtained for the in-situ composite compared to the base alloys.

Development of an Underwater Dynamic Compaction Technique for Making Al‐Based Composites

In the present investigation an apparatus for underwater explosive compaction of Al composites is developed. To evaluate the performance of the apparatus, underwater shock pressure was measured using manganin‐gauge and the pressure was also estimated through numerical simulation. The measured pressure showed good agreement with the simulated one. The applied pressure can be controlled easily by varying the height of water column in the apparatus. Since the impacting explosive pressure is not very high (5–15 GPa), the possibility of synthesizing various defect‐free aluminum based composites is explored. The dynamic characteristics of the shock consolidation apparatus is corroborated by the high strength defect‐free compacts.