Analysis and Development of Cucrzr Alloy Fabrication in Lpbf: Impact of Process Parameters and Heat Treatments on Thermo-Mechanical Properties

44 Pages Posted: 18 Nov 2024

See all articles by Massimiliano Bonesso

Massimiliano Bonesso

affiliation not provided to SSRN

Mattia Lago

affiliation not provided to SSRN

Giacomo Favero

affiliation not provided to SSRN

Pietro Rebesan

affiliation not provided to SSRN

Mehrdad Faraji

affiliation not provided to SSRN

Alberto Campagnolo

affiliation not provided to SSRN

Giovanni Meneghetti

affiliation not provided to SSRN

Simone Mancin

University of Padua

Andrea Friso

affiliation not provided to SSRN

Adriano Pepato

affiliation not provided to SSRN

Razvan Dima

affiliation not provided to SSRN

Irene Calliari

affiliation not provided to SSRN

Abstract

This study explores the manufacturing and characterization of CuCrZr alloy using the Laser Powder Bed Fusion (LPBF) process, focusing on the optimization of process parameters and the impact of heat treatments on the thermo-mechanical properties. The research demonstrates the feasibility of producing dense using a low-power LPBF machine, achieving a relative density of 99.75% through process parameter tuning. Two heat treatments have been tested, the standard Solution Annealed and Age-Hardened (SA+AH) heat treatment and the Direct Age-Hardened (DAH) heat treatment, both of which produce metallic chromium precipitates that enhance the material's conductivity and mechanical properties. The as-built (AB) parts exhibit a unique microstructure, characterized by columnar grains and minimal lack of fusion porosities, which remains unchanged with the DAH heat treatment. However, annealing the material partially recrystallizes the microstructure, resulting in larger grains and lowering the mechanical strength of the material. Specifically, the DAH heat treatment resulted in a yield strength that was doubled and an Ultimate Tensile Strength (UTS) that was 40% higher compared to the solution annealed parts. The SA+AH heat treatment results in partial recrystallization of the microstructure, which makes the material more ductile. It increases the material's thermal and electrical conductivity although to the same extent of the DAH heat treatment. The study concludes that directly ageing an LPBF part is the optimal choice to achieve an excellent combination of high mechanical strength and high thermal and electrical conductivity.

Keywords: Laser powder bed fusion, CuCrZr Alloy, Aging Heat Treatments, mechanical properties, Thermal Properties

Suggested Citation

Bonesso, Massimiliano and Lago, Mattia and Favero, Giacomo and Rebesan, Pietro and Faraji, Mehrdad and Campagnolo, Alberto and Meneghetti, Giovanni and Mancin, Simone and Friso, Andrea and Pepato, Adriano and Dima, Razvan and Calliari, Irene, Analysis and Development of Cucrzr Alloy Fabrication in Lpbf: Impact of Process Parameters and Heat Treatments on Thermo-Mechanical Properties. Available at SSRN: https://ssrn.com/abstract=5025000 or http://dx.doi.org/10.2139/ssrn.5025000

Massimiliano Bonesso (Contact Author)

affiliation not provided to SSRN ( email )

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Mattia Lago

affiliation not provided to SSRN ( email )

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Giacomo Favero

affiliation not provided to SSRN ( email )

No Address Available

Pietro Rebesan

affiliation not provided to SSRN ( email )

No Address Available

Mehrdad Faraji

affiliation not provided to SSRN ( email )

No Address Available

Alberto Campagnolo

affiliation not provided to SSRN ( email )

No Address Available

Giovanni Meneghetti

affiliation not provided to SSRN ( email )

No Address Available

Simone Mancin

University of Padua ( email )

Andrea Friso

affiliation not provided to SSRN ( email )

No Address Available

Adriano Pepato

affiliation not provided to SSRN ( email )

No Address Available

Razvan Dima

affiliation not provided to SSRN ( email )

No Address Available

Irene Calliari

affiliation not provided to SSRN ( email )

No Address Available

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