Work

The Role of Energy Density in Phase-Microstructure Evolution and Mechanical Properties of Ti-Zr-Cu Alloys Fabricated by Laser Powder-Bed Fusion

Year: 2024

Type: article

Abstract: Laser powder-bed fusion (L-PBF) additive manufacturing technique offers significant advantages in fabricating Ti-Zr-Cu alloys by enabling precise control over microstructure through process parameter variation.This study investigates the impact of energy density on phase formation, microstructure evolution, and mechanical properties of Ti-Zr-Cu alloys produced from blended elemental powders.By adjusting laser scan speeds to achieve different energy densities, the study reveals that high energy densities result in homogeneous β-(Ti,Zr) phases, while lower energy densities lead to incomplete melting, phase segregation, and inhomogeneous microstructures.Advanced characterisation techniques, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), were utilised to analyse phase composition and microstructural transformations.Vickers hardness testing demonstrated a correlation between energy density and mechanical properties, with higher energy densities improving overall material hardness.The findings offer valuable insights into optimising L-PBF process parameters for enhanced performance in additively manufactured Ti-Zr-Cu alloys, providing a pathway for advanced applications in biomedical and structural components.

Source: Engineering Journal

DOI: 10.4186/ej.2024.28.12.101

Authors: Pattarapong Wannapraphai, Thanawat Phetrattanarangsi, Surasak Kuimalee, Boonrat Lohwongwatana, Chedtha Puncreobutr

Institutions: Chulalongkorn University, Maejo University

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: diamond

Funder: Royal Academy of Engineering