Session: 18-08 Advanced Manufacturing and Design II

Paper Number: 124342

124342 - Improving the Fatigue Life of an Additively Manufactured Stainless-Steel Specimen Using a Secondary Grinding Process 

Grinding is a simple and affordable process that is typically done in most metallic manufacturing centers for the purpose of manufacturing assistance. With its abundance within industry, this provides an opportunity to use it as a method to also improve material properties such as strength, and fatigue. By using a grinding technique with an altered cooling method, it is possible to impart a compressive residual stress upon the surface of the metallic material whilst also providing an improved surface roughness which provides a longer fatigue life and higher material strength. This study uses a typical grinding process and the improved grinding process to show imparted residual stress and surface roughness. Residual stress measurement tools were used to measure residual stresses imparted on the material through the thickness. Microstructural analysis via optical, and SEM microscopy was completed for typical and improved grinding methodologies. Mechanical testing through High Cycle Fatigue (HCF) was completed to verify improvement. There is 2 different cooling methods that needs comparison and will be done in this study as then for a given particular material there would be standard of what grinding speed and cooling pressure that can be used to get the best results in mechanical properties. And finally the study will look into the effect of grinding direction.

Presenting Author: Manigandan Kannan The University of Akron

Presenting Author Biography: The presenter is currently an assistant professor at the university of akron and has published over 70 articles in the field of material properties and characterization in both metals and composites.

Authors:

Murali Krishnan Ramachandran The University of Akron
Safia Alam Sumaiya The University of Akron
Mandar Golvaskar The University of Akron
Julia Wood The University of Akron
Isaac Sluder The University of Akron
Chandra Sekhar Rakurty MK Morse
Nithin Rangasamy MK Morse
Onome Scott Emuakpor Hyphen Innovations
Manigandan Kannan The University of Akron