Effect of Build Geometry and Porosity in Additively Manufactured CuCrZrSource: Journal of Engineering Materials and Technology:;2024:;volume( 146 ):;issue: 003::page 31004-1DOI: 10.1115/1.4064003Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The current work presents an understanding of microstructure and mechanical properties as a function of build geometry and build orientation in Cu-Cr-Zr via the laser powder bed fusion (LPBF) technique. Porosity, microstructure, and mechanical properties have been compared in as-printed (AP) and heat-treated (HT) LPBF Cu-Cr-Zr, between cylindrical and cube geometries, along the longitudinal (L) and transverse (T) build orientations. Varying porosity levels were observed that yielded parts with 96–97% relative density in the AP condition. The AP microstructure demonstrated a hierarchical microstructure, comprising grains (2.5–100 μm) with a cellular substructure (400–850 nm) and intracellular nanoscale (20–60 nm) precipitates. Unlike most materials in the AP condition, crystallographic texture was found to be absent; however, very distinct river-like patterns highlighted a novel feature of the LPBF Cu-Cr-Zr. Upon solutionizing and aging, Cr precipitates were seen heterogeneously nucleating along cell boundaries (0.5–1.3 μm), causing up to 45% enhancement in the strength and a 4–5% lower ductility. The yield strength along the transverse orientation was 10–16% higher than that of longitudinal orientation, in both the AP and HT conditions. Fracture surface of the tensile samples exhibited micro-voids, cleavage facets, and unmelted particles. Despite the porosity, overall mechanical properties matched well with those obtained in nearly dense (>99%) samples and the mechanical property debit was less than 10%.
|
Collections
Show full item record
contributor author | Kulkarni, Anup | |
contributor author | Peddiraju, Vivek C. | |
contributor author | Chatterjee, Subhradeep | |
contributor author | Srinivasan, Dheepa | |
date accessioned | 2024-04-24T22:40:00Z | |
date available | 2024-04-24T22:40:00Z | |
date copyright | 2/12/2024 12:00:00 AM | |
date issued | 2024 | |
identifier issn | 0094-4289 | |
identifier other | mats_146_3_031004.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4295644 | |
description abstract | The current work presents an understanding of microstructure and mechanical properties as a function of build geometry and build orientation in Cu-Cr-Zr via the laser powder bed fusion (LPBF) technique. Porosity, microstructure, and mechanical properties have been compared in as-printed (AP) and heat-treated (HT) LPBF Cu-Cr-Zr, between cylindrical and cube geometries, along the longitudinal (L) and transverse (T) build orientations. Varying porosity levels were observed that yielded parts with 96–97% relative density in the AP condition. The AP microstructure demonstrated a hierarchical microstructure, comprising grains (2.5–100 μm) with a cellular substructure (400–850 nm) and intracellular nanoscale (20–60 nm) precipitates. Unlike most materials in the AP condition, crystallographic texture was found to be absent; however, very distinct river-like patterns highlighted a novel feature of the LPBF Cu-Cr-Zr. Upon solutionizing and aging, Cr precipitates were seen heterogeneously nucleating along cell boundaries (0.5–1.3 μm), causing up to 45% enhancement in the strength and a 4–5% lower ductility. The yield strength along the transverse orientation was 10–16% higher than that of longitudinal orientation, in both the AP and HT conditions. Fracture surface of the tensile samples exhibited micro-voids, cleavage facets, and unmelted particles. Despite the porosity, overall mechanical properties matched well with those obtained in nearly dense (>99%) samples and the mechanical property debit was less than 10%. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Effect of Build Geometry and Porosity in Additively Manufactured CuCrZr | |
type | Journal Paper | |
journal volume | 146 | |
journal issue | 3 | |
journal title | Journal of Engineering Materials and Technology | |
identifier doi | 10.1115/1.4064003 | |
journal fristpage | 31004-1 | |
journal lastpage | 31004-8 | |
page | 8 | |
tree | Journal of Engineering Materials and Technology:;2024:;volume( 146 ):;issue: 003 | |
contenttype | Fulltext |