Publication result 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

WoS Article

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

Key words in English

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

Authors

MALÝ, M.; HÖLLER, C.; SKALON, M.; MEIER, B.; KOUTNÝ, D.; PICHLER, R.; SOMMITSCH, C.; PALOUŠEK, D.

RIV year

2019

Released

20.03.2019

Publisher

MDPI

Location

Švýcarsko

ISBN

1996-1944

Periodical

Materials

Volume

12

Number

6

State

Swiss Confederation

Pages from

1

Pages to

13

Pages count

13

URL

https://www.mdpi.com/1996-1944/12/6/930

Full text in the Digital Library

http://hdl.handle.net/11012/138396

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",
  journal="Materials",
  year="2019",
  volume="12",
  number="6",
  pages="1--13",
  doi="10.3390/ma12060930",
  url="https://www.mdpi.com/1996-1944/12/6/930"
}

Documents

materials-12-00930