National Institute of Technology, Rourkela

राष्ट्रीय प्रौद्योगिकी संस्थान, राउरकेला

ଜାତୀୟ ପ୍ରଯୁକ୍ତି ପ୍ରତିଷ୍ଠାନ ରାଉରକେଲା

An Institute of National Importance

Seminar Details

Seminar Title:
Development of Ni-based Hybrid Coatings by Electrodeposition/Laser Cladding Followed by Ultrasonic Shot Peening
Seminar Type:
Defence Seminar
Department:
Metallurgical and Materials Engineering
Speaker Name:
Adarsh Kushwaha ( Rollno : 519mm1005)
Speaker Type:
Student
Venue:
MM214
Date and Time:
09 Apr 2025 5:00 PM
Contact:
Anindya Basu
Abstract:

The ultrasonic shot peening (USSP) technique is a reliable post-treatment method for various industrial components to prevent functional failures by imparting residual compressive stresses, texturing, roughness modification, surface nano-crystallization, and compaction. This study aims to develop hybrid Ni-based coatings and cladding on mild steel using Electrodeposition/laser cladding (LC) and USSP techniques. Morphological studies reveal that the coatings and claddings exhibit enhanced closure of pores/cracks, increased micro-hardness, and improved corrosion and scratch resistance after peening. XRD analysis confirms the presence of compressive residual stresses, as well as grain refinement and texturing effects after the peening. After undergoing USSP treatment, the average surface roughness increased by up to 6 µm due to the formation of dimples. Furthermore, compared to the Ni/Ni-TiO2/Ni-Cr coatings and claddings, the hybrid coatings exhibit a hydrophobic character linked to improved corrosion resistance and better in-depth roughness profiles. Furthermore, the research endeavors to improve their mechanical and electrochemical properties by employing USSP's varied process parameters in a hybrid approach.