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research-article

Multi-Objective Build Orientation Optimization for Powder Bed Fusion by Laser

[+] Author and Article Information
Salah Eddine Brika

Mechanical engineering student, 212, 5000 Bourret Ave, H3W 1L4, Montreal, Quebec, Canada
sleh.brika@mail.mcgill.ca

Yaoyao Fiona Zhao

Assistant professor - Mechanical engineering department, Room 148, 817 Sherbrooke Street West, H3A 0C3, Montreal, QC, Canada
yaoyao.zhao@mcgill.ca

Mathieu Brochu

Associate professor - Mining and Materials Engineering Department, Room 2640, 3610 University Street, H3A 0C5, Montreal, QC, Canada
mathieu.brochu@mcgill.ca

Justin Mezzetta

Master of engineering - Mining and Materials Engineering, 3610 University Street, H3A 0C5, Montreal, QC, Canada
justinmezzetta@hotmail.com

1Corresponding author.

ASME doi:10.1115/1.4037570 History: Received July 19, 2017; Revised August 01, 2017

Abstract

This paper proposes an integrated approach to determine optimal build orientation for Selective Laser Melting (SLM), by simultaneously optimizing mechanical properties, surface roughness, the amount of support structure and build time-cost. Experimental data analysis has been used to establish the objective functions for different mechanical properties and surface roughness. Geometry analysis of the part has been used to estimate the needed support structure and thus evaluate the build time and cost. Normalized weights are assigned to different objectives depending on their relative importance allowing solving the multi-objective optimization problem using a genetic optimization algorithm. A study case is presented to demonstrate the capabilities of the developed system. The major achievements of this work are the consideration of multiple objectives, establishment of objective function considering different load direction and heat treatments. A user friendly graphical user interface was developed allowing to control different optimization process factors and providing different visualization and evaluation tools.

Copyright (c) 2017 by ASME
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