The effect of beam pulsing on laser beam processing of Ti-6Al-4V using a prototype laser additive manufacturing platform
department or school: Applied Science, Faculty of
department or school: Materials Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Varghese Ayrookuzhy, Ebbie
issued: 2025-01-02T21:03:50Z
issued: 2024
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Recent advancements in additive manufacturing have highlighted the limitations of conventional beam motion techniques in manipulating cooling rates and melt pool dynamics. This pursuit has led to the investigation of alternative approaches including multi-beam motion, beam oscillation, beam shaping and beam pulsing, all aimed at refining control over the manufacturing process. Notably, recent research emphasizes the potential benefits of operating in a keyhole regime during laser powder bed additive manufacturing. The primary focus of this research is to provide preliminary insights for our industrial partner (CANMORA TECH Inc.) on the feasibility of beam pulsing as a mechanism for controlling microstructure and particularly defects when melting under conditions that lead to keyholing. The aim is to achieve this control by dynamically adjusting the beam's position over time and modulating power within different duty cycles and frequencies in Laser Powder Bed Additive Manufacturing. The laser tracks are built under these varied pulsing conditions and the results of heat transfer modelling will be presented to predict the impact of pulsing on melt pool geometry.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/90014
note: The effect of beam pulsing on laser beam processing of Ti-6Al-4V using a prototype laser additive manufacturing platform by Ebbie Varghese Ayrookuzhy B.Tech. (Metallurgy), Mahatma Gandhi University, 2018 M.Sc. (Material Science and Engineering), University of Sheffield, 2020 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Materials Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) December 2024 © Ebbie Varghese Ayrookuzhy, 2024 ii The following individuals certify that they have read and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis entitled: The effect of beam pulsing on laser beam processing of Ti-6Al-4V using a prototype laser additive manufacturing platform submitted by Ebbie Varghese Ayrookuzhy in partial fulfillment of the requirements for the degree of Master of Applied Science in Materials Engineering Examining Committee: Dr. Chad W Sinclair, Professor, Materials Engineering, UBC Supervisor Dr. Daan Maijer, Professor, Materials Engineering, UBC Supervisory Committee Member Dr Adam Thomas Clare, Professor, Mechanical Engineering, UBC Supervisory Committee Member iii Abstract Recent advancements in additive manufacturing have highlighted the limitations of conventional beam motion techniques in manipulating cooling rates and melt pool dynamics. This pursuit has led to the investigation of alternative approaches including multi-beam motion, beam oscillation, beam shaping and beam pulsing, all aimed at refining control over the manufacturing process. Notably, recent research emphasizes the potential benefits of operating in a keyhole regime during laser powder bed additive manufacturing, The primary focus of this research is to provide preliminary insights for our industrial partner (CANMORA TECH Inc.) on the feasibility of beam pulsing as a mechanism for controlling microstructure and particularly defe…
has type: Thesis/Dissertation
date issued: 2025-05
is shown at: 10.14288/1.0447638
language: eng
degree discipline: Materials Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Sinclair, Chad W.
type: Text
type: Still Image
identifier URI: http://hdl.handle.net/2429/90014