CHARACTERIZATION OF THE SOLID-STATE BONDING FOR SIMULATED CHARGE AND SEAM WELDS IN THE PORTHOLE DIE EXTRUSION PROCESS

Author

Randall L. Bowers, University of KentuckyFollow

Author ORCID Identifier

https://orcid.org/0009-0003-9434-7610

Date Available

5-10-2025

Year of Publication

2025

Document Type

Master's Thesis

Degree Name

Master of Science in Materials Science and Engineering (MSMSE)

College

Engineering

Department/School/Program

Materials Science and Engineering

Faculty

Dr. Paul F. Rottmann

Faculty

Dr. Fuqian Yang

Abstract

The isothermal (ISO-T) compression configuration is ideal for utilizing as a material input of flow stress at temperature and strain rate in models of the porthole die extrusion process due to the isothermal nature of the test. Micro-tensile testing was conducted to validate the solid-state welding integrity of the ISO-T samples at various temperatures and strain rates. Results of the mechanical testing were correlated with fractography and microstructural evaluations of the welds to confirm bonding behavior. Both clean interface conditions and oxidation and lubrication layers were evaluated to simulate the difference of seam and charge welds in the process. Results show increasing strain rate and temperature positively affect bonding conditions. The presence of barrier layers of both oxidation and lubrication negatively affect the weld integrity.

Digital Object Identifier (DOI)

https://doi.org/10.13023/x96d-dh36

Funding Information

This study was supported by the REMADE Institute and the Department of Energy, REMADE Project Number: 21-01-MM-5006.

Recommended Citation

Bowers, Randall L., "CHARACTERIZATION OF THE SOLID-STATE BONDING FOR SIMULATED CHARGE AND SEAM WELDS IN THE PORTHOLE DIE EXTRUSION PROCESS" (2025). Theses and Dissertations--Chemical and Materials Engineering. 172.
https://uknowledge.uky.edu/cme_etds/172