Sunday, July 10, 2022

URSP Student Daniel Hernandez Analyzes the Surface Degradation of Additively Manufactured (AM) ABS Polymers for Naval Application

My name is Daniel Hernandez, I am a junior at George Mason University working with Dr. Ali Beheshti to analyze the surface degradation of additively manufactured (AM) ABS polymers for naval application. This project is a continuation of my work done in the summer semester to determine the viability of AM ABS polymers in a saline environment in comparison to their traditionally manufactured counterpart. Where the main focus this semester has been the aging of the ABS samples and observing the changes in the surface topography. The aging chambers consisted of tanks filled with artificial seawater heated to 22°C, 27°C, and 105°C accordingly using a water heater with set submerged durations of 7, 14, and 21 days. My day-to-day interactions consist of ensuring the proper levels of seawater in the tanks and recording the change in mass of the samples. Currently, only half of the samples have been aged though the remainder is set to be finished soon.

The next steps are to assess the surfaces of the samples through micro indentation and profiling tests. These tests will allow for the observation of the change in wear and friction of the surfaces as well as the Young’s Modulus of the samples. Given if time permits mechanical and tribological evaluations will be done on the ABS samples to observe the change in mechanical strength and serve as another method of observing the surface topography of the samples.This has been a rather engaging experience that has allowed me to pursue my interest in the naval engineering field. Furthermore, working with Dr. Beheshti has allowed me to gather a sense of the lab working environment and has compelled me to develop my understanding of the 3D printing process and corrosive behavior of the ocean through whichever future opportunities may be presented.