Investigation on the effect of heat treatment and process parameters on the tensile behaviour of SLM Ti-6Al-4V parts

Additive manufacturing (AM) has various independent parameters that affect the mechanical properties and quality of the produced parts that are not linearly the function of each other. Process parameters in metal AM are very hard to control, analyse and optimise because they affect each other even t...

Full description

Saved in:
Bibliographic Details
Published in:International journal of advanced manufacturing technology 2019-04, Vol.101 (9-12), p.3183-3197
Main Authors: Khorasani, Amir Mahyar, Gibson, Ian, Ghaderi, Alireza, Mohammed, Mazher Iqbal
Format: Article
Language:English
Subjects:
CAE) and Design
Computer-Aided Engineering (CAD
Cracks
Design of experiments
Engineering
Heat treating
Heat treatment
Industrial and Production Engineering
Laser beam melting
Lasers
Mathematical models
Mechanical Engineering
Mechanical properties
Media Management
Numerical models
Numerical prediction
Original Article
Porosity
Process parameters
Rapid prototyping
Statistical methods
Tensile strength
Tensile tests
Titanium base alloys
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Additive manufacturing (AM) has various independent parameters that affect the mechanical properties and quality of the produced parts that are not linearly the function of each other. Process parameters in metal AM are very hard to control, analyse and optimise because they affect each other even though they can be independently changed. Changing process parameters in a wide range is not possible due to the formation of problems such as cracks, balling, unmelted powders, porosity and distortion. In this paper, a numerical model to predict the value of tensile strength of selective laser melting (SLM) Ti-6Al-4V parts and analyse the effect of process parameters on the results has been proposed. Taguchi L25 Design of Experiment (DOE) across 125 samples to create a comprehensive and general overview of influential parameters on the build process was investigated. Specifically, parameters included laser power, scan speed, hatch spacing, laser pattern angle and heat treatment (HT). To evaluate and analyse the build process according to established statistical variances, a minimum of five samples based on ASTM standard (for tensile test) were prepared. Heat treatment was added to the DOE to analyse the combined process and post-process effects. Results were compared (cross-validated) against existing values found in the literature and were found to effectively predict and explain the behaviour of tensile strength when changing process parameters.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-018-3162-8