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  • Processing aluminum alloy with hybrid wire arc additive manufacturing and ultrasonic nanocrystalline surface modification to improve porosity, surface finish, and hardness
Title: Processing aluminum alloy with hybrid wire arc additive manufacturing and ultrasonic nanocrystalline surface modification to improve porosity, surface finish, and hardness
In this paper, a novel hybrid wire arc additive manufacturing (WAAM) and ultrasonic nanocrystal surface modification (UNSM) on porosity manipulation and surface properties of aluminum 5356 alloys was studied. The goal is to improve the quality of the WAAM-built part by eliminating bigger pores and reducing its size, reducing surface roughness, and increasing surface hardness. The as-built WAAM and WAAM-UNSM-treated samples were quantitatively studied for porosity using an X-ray micro-computed tomography (μ-CT). The surface roughness was measured on the surface profile of the same samples before and after UNSM treatment. Followed by the Vickers micro-hardness tests to evaluate the hardness modified by the influence of the UNSM treatment. It was found that the bigger pores in the as-built WAAM samples were eliminated and the medium-sized pores were shrunk to almost half the size after the UNSM treatment. Further, the UNSM treatment showed a significant improvement in both surface roughness and hardness on the WAAM Al5356 samples. This experimental work demonstrates the critical advantages of hybrid WAAM-UNSM in improving the qualities of the WAAM processed parts.  more » « less
Award ID(s):
2219347
PAR ID:
10472066
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ;
Editor(s):
S. Kapoor, editor-in-chief
Publisher / Repository:
Elsvier
Date Published:
Journal Name:
Journal of Manufacturing Processes
Volume:
103
Issue:
C
ISSN:
1526-6125
Page Range / eLocation ID:
181 to 192
Subject(s) / Keyword(s):
Wire arc additive manufacturing Ultrasonic nanocrystal surface modification Porosity Surface roughness Hardness.
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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