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.

Original Title

Effect of Process Parameters and High-Temperature Preheating on Residual Stress and Relative Density of Ti6Al4V Processed by Selective Laser Melting

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

Selective Laser Melting; Ti6Al4V; residual stress; deformation; preheating; relative density; powder degradation

Released

20.03.2019

Publisher

MDPI

Location

Švýcarsko

Pages from

1

Pages to

13

Pages count

13

URL

Full text in the Digital Library

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",
  annote="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.",
  address="MDPI",
  chapter="156298",
  doi="10.3390/ma12060930",
  howpublished="online",
  institution="MDPI",
  number="6",
  volume="12",
  year="2019",
  month="march",
  pages="1--13",
  publisher="MDPI",
  type="journal article in Web of Science"
}