Improving oxidation and wear resistance of Ti by laser surface alloying (LSA) with Si, Al or Si+Al forming a Ti5Si3-rich layer and understanding the concerned mechanism of oxidation and wear resistance due to Ti5Si3-rich layer [57,73,82,89,155,175].
Developing a new strategy of laser assisted composite surfacing (LCS) to significantly enhance resistance to wear in Al/Al-alloys [4,12,13,130,132,134], Cu/Cu-alloys [9,15,129], Mg-alloys [10,39,50,143] and stainless steel [23,24].
Enhancing wear and erosion (both at room/high temperature) resistance of Cu by LSA with Cr by solid solution and dispersion hardening. A process map concerning laser parameters and surface microstructure, composition and hardness has been established [81,83,99,105,107,160].
Improving corrosion and wear resistance of Mg-alloys by laser surface melting (LSM) or LSA with Al+Mn [40,48,56,137,140-144,147].
Enhancing oxidation resistance of 2.25Cr-1Mo ferritic stainless steel by LSA with Cr  and pitting and general corrosion resistance and wear resistance of AISI 304/316 austenitic stainless steel [80,101,156] by LSA with Mo.
Developing high specific surface area neural stimulation electrode by LSA of Ti with Ir and mimic the spatio-temporal profile of neuronal activation to cure neuronal disorders (like tinnitus, cardio-vascular stimulation, etc.) [92,150,159,161].
Demonstrating for the first time that laser surface hardening is more appropriate for enhancing wear and fatigue resistance of austempered ductile iron than that by LSA or laser surface melting due to a residual compressive stress on the surface [69,70,152,154].
Developing a co-deposition technique to apply nano-aluminides on surfaces of copper to enhance wear resistance without deteriorating electrical conductivity. This is the first time that co-deposition of nano-aluminide/intermetallic has been possible [62,74].
Laser assisted bending of stainless steel (for automobiles) [38,41] and laser assisted fabrication of stainless steel [29-31,127,131,133].
Laser surface hardening (LSH) of plain carbon and ball bearing steel [2,138,151].
Exploring laser assisted fabrication/deposition of bio-implants using metallic powders [11,22].
Reviewing different aspects of LSE [14,45,94,111,148,174].
Enhancing wear and corrosion resistance of ball bearing steel by different surface engineering approaches (gas and plasma nitriding, plasma ion implantation) [2,3,59,171,168]
Earlier Prof. Manna developed a novel technique of enhancing diffusion coating kinetics by increasing specific boundary area on surface through controlled surface deformation and diffusion annealing .
Utilizing plasma ion implantation based surface engineering to enhance hardness and corrosion resistance of stainless and ball bearing steel [7,27,37,42,47,58,59,135,168]. Prof. Manna installed a plasma-immersion-ion-implantation (PIII) facility in 2000 with a DST project, which has now been upgraded to an indigenously designed/developed plasma assisted implantation and deposition (PAID) unit (a new hybrid deposition and implantation technology) through another DST funding. This is the first university based PIII/PAID laboratory in India (for metallic/ceramic components).