Date of Award
2025
Document Type
Thesis
Degree Name
Master of Science in Engineering (MSE)
Department
Mechanical and Aerospace Engineering
Committee Chair
Judith Schneider
Committee Member
Nicholas Ginga
Committee Member
Jeffrey Gaddes
Research Advisor
Judith Schneider
Subject(s)
Aluminum alloys--Mechanical properties, Aluminum alloys--Heat treatment, Additive manufacturing
Abstract
Mechanical and microstructural evaluation was carried out on a modified 2XXX series aluminum alloy designed for laser powder bed fusion (LPBF). Aluminum 2139AM samples printed via LPBF were given three distinct heat treatments: baseline T4 with water quench, modified T4 with hot isostatic pressing (HIP) and natural cooling, and modified T4 with HIP and rapid gas quench. This study examines the effects of the experimental HIP treatment with rapid gas cooling on the LPBF samples to increase ductility and assess the potential of the material as an AM replacement for 2024-T4 aluminum parts. Use of HIP processing on 2139AM was successful at increasing elongation at break to 11% compared to 8% without HIP attributed to decreased porosity. Al2Cu precipitates were identified as the principal strengthening precipitate, and precipitate size and dispersion with respect to cooling rates are discussed.
Recommended Citation
Wagnon, James, "Influence of hot isostatic pressing and quench rate on aluminum 2139AM, a novel alloy for LPBF" (2025). Theses. 788.
https://louis.uah.edu/uah-theses/788