Name
Tech. Session XVI - 135
Date & Time
Friday, June 27, 2025, 10:55 AM - 11:20 AM
Description
Additive Manufacturing (AM) processes offer new routes for remanufacturing and restoration of worn components. Its special characteristics allow for the combination of materials with various properties and surface functionalization. Metal powder-based Laser Directed Energy Deposition (LDED) technique frequently fails to provide surface and dimensional quality, necessitating post-processing procedures. The present study assesses the viability and performance of conventional machining of CPM 9V crucible steel used for restoration of cylindrical H13 tool steel substrate through LDED process. In this study, hard turning was employed for finishing of ultra-hard CPM 9V deposit to study the effect of turning parameters i.e. cutting speed, depth of cut, and feed rate on cutting forces and surface roughness. The chip morphology and microstructure through EBSD have also been observed during the turning of hard CPM 9V. The experimental observation showed that in hard turning, with increasing cutting speed tangential force was reduced by 14% and radial force by 32%. Higher feed rates from 0.05 mm/rev to 0.15 mm/rev increase the tangential force by 43%, and decrease radial force by 22%, due to significant ploughing forces at lower uncut chip thicknesses affecting radial forces. The depth of cut significantly impacts all forces. Surface roughness was influenced mostly by cutting speed. In addition to this, the microhardness of the machined surface is higher (~ 830.6 HV) in comparison to the deposited surface due to the work hardening. The microstructure showed the presence of carbides in the material matrix. It also presented that the machined surface has finer grains in comparison to the deposited clad grains resulting in deformation-induced hardness. Thus, this work has demonstrated the capability of hard turning in finishing the ultra-hard deposits obtained from LDED-based die repair.
Location Name
Redbud C
Full Address
Hyatt Regency
220 N Main St
Greenville, SC 29601
United States
Session Type
Technical Session
Paper #
NAMRC 135
Author List
Emmanuel Olorundaisi and Peter Olubambi
Paper Title
Evaluating Microstructural Changes and Hardness in Ni14.286Al14.286Co14.286Fe14.286Mn14.286Ti14.286Cr14.286 High-Entropy Alloy Subjected to Heat Treatment in Oxidative and Non-Oxidative Environments
Presenter Name
Emmanuel Olorundaisi
Session Chair
Peter Olubambi, Vidya Tiwari
Presenter Email
olorundaisiemmanuel@gmail.com