Publication detail
Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting
MALÝ, M. HÖLLER, C. SKALON, M. MEIER, B. KOUTNÝ, D. PICHLER, R. SOMMITSCH, C. PALOUŠEK, D.
English title
Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting
Type
journal article in Web of Science
Language
en
Original abstract
The aim of this study is to observe the effect of process parameters on residual stresses and relative density of Ti6Al4V samples produced by Selective Laser Melting. The investigated parameters were hatch laser power, hatch laser velocity, border laser velocity, high-temperature preheating and time delay. Residual stresses were evaluated by the bridge curvature method and relative density by the optical method. The effect of the observed process parameters was estimated by the design of experiment and surface response methods. It was found that for an effective residual stress reduction, the high preheating temperature was the most significant parameter. High preheating temperature also increased the relative density but caused changes in the chemical composition of Ti6Al4V unmelted powder. Chemical analysis proved that after one build job with high preheating temperature, oxygen and hydrogen content exceeded the ASTM B348 limits for Grade 5 titanium.
English abstract
The aim of this study is to observe the effect of process parameters on residual stresses and relative density of Ti6Al4V samples produced by Selective Laser Melting. The investigated parameters were hatch laser power, hatch laser velocity, border laser velocity, high-temperature preheating and time delay. Residual stresses were evaluated by the bridge curvature method and relative density by the optical method. The effect of the observed process parameters was estimated by the design of experiment and surface response methods. It was found that for an effective residual stress reduction, the high preheating temperature was the most significant parameter. High preheating temperature also increased the relative density but caused changes in the chemical composition of Ti6Al4V unmelted powder. Chemical analysis proved that after one build job with high preheating temperature, oxygen and hydrogen content exceeded the ASTM B348 limits for Grade 5 titanium.
Keywords in English
Selective Laser Melting; Ti6Al4V; residual stress; deformation; preheating; relative density; powder degradation
Released
20.03.2019
Publisher
MDPI
Location
Švýcarsko
ISSN
1996-1944
Volume
12
Number
6
Pages from–to
1–13
Pages count
13
BIBTEX
@article{BUT156298,
author="Martin {Malý} and Christian {Höller} and Mateusz {Skalon} and Benjamin {Meier} and Daniel {Koutný} and Rudolf {Pichler} and Christof {Sommitsch} and David {Paloušek},
title="Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting",
year="2019",
volume="12",
number="6",
month="March",
pages="1--13",
publisher="MDPI",
address="Švýcarsko",
issn="1996-1944"
}