Effect of built orientation on direct metal laser sintering of TI-6AL-4V

P. Chandramohan, Shepherd Bhero, Babatunde Abiodun Obadele, Peter Apata Olubambi, B. Ravisankar

Research output: Contribution to journalArticle

Abstract

The use of direct metal laser sintering for fabrication of three-dimensional engineering parts is fast gaining momentum in the engineering industries. This process consolidates metallic powders by using a laser source. In this study, the effect of built direction (horizontal and vertical) on the microstructure, mechanical properties and corrosion resistance of Ti-6Al-4V alloy printed using direct metal laser sintering (DMLS) technology was investigated. Results show that microstructure of Ti-6Al-4V surface have few pores. The melt pool of vertically built parts revealed the presence of fine cellular-dendritic martensite. Microhardness of vertical built specimens was relatively higher than the horizontal built specimens which could be due to the presence of vanadium carbide. Fractography analysis revealed that horizontal built specimens displayed higher ductility than the vertical built. For horizontal built sample, the corrosion current densities in 3.5% NaCl and 1 M HCl solutions are significantly lower when compared with that of 1 M H 2 SO 4 , which might be because of stable oxide layer formation. Generally, horizontal build parts yield relatively better mechanical properties and corrosion resistance supported by ideal microstructure. In case of vertical built-up, it is better to limit to a maximum height of 40 mm for the set parameters.

Original languageEnglish
Pages (from-to)69-77
Number of pages9
JournalIndian Journal of Engineering and Materials Sciences
Volume25
Issue number1
Publication statusPublished - Feb 2018
Externally publishedYes

Fingerprint

Sintering
Metals
Microstructure
Corrosion resistance
Lasers
Mechanical properties
Vanadium
Fractography
Martensite
Powders
Microhardness
Oxides
Carbides
Ductility
Momentum
Current density
Corrosion
Fabrication
Industry
titanium alloy (TiAl6V4)

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

@article{d7263156f0044d669ad9738dcd197871,
title = "Effect of built orientation on direct metal laser sintering of TI-6AL-4V",
abstract = "The use of direct metal laser sintering for fabrication of three-dimensional engineering parts is fast gaining momentum in the engineering industries. This process consolidates metallic powders by using a laser source. In this study, the effect of built direction (horizontal and vertical) on the microstructure, mechanical properties and corrosion resistance of Ti-6Al-4V alloy printed using direct metal laser sintering (DMLS) technology was investigated. Results show that microstructure of Ti-6Al-4V surface have few pores. The melt pool of vertically built parts revealed the presence of fine cellular-dendritic martensite. Microhardness of vertical built specimens was relatively higher than the horizontal built specimens which could be due to the presence of vanadium carbide. Fractography analysis revealed that horizontal built specimens displayed higher ductility than the vertical built. For horizontal built sample, the corrosion current densities in 3.5{\%} NaCl and 1 M HCl solutions are significantly lower when compared with that of 1 M H 2 SO 4 , which might be because of stable oxide layer formation. Generally, horizontal build parts yield relatively better mechanical properties and corrosion resistance supported by ideal microstructure. In case of vertical built-up, it is better to limit to a maximum height of 40 mm for the set parameters.",
author = "P. Chandramohan and Shepherd Bhero and Obadele, {Babatunde Abiodun} and Olubambi, {Peter Apata} and B. Ravisankar",
year = "2018",
month = "2",
language = "English",
volume = "25",
pages = "69--77",
journal = "Indian Journal of Engineering and Materials Sciences",
issn = "0971-4588",
publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",
number = "1",

}

Effect of built orientation on direct metal laser sintering of TI-6AL-4V. / Chandramohan, P.; Bhero, Shepherd; Obadele, Babatunde Abiodun; Olubambi, Peter Apata; Ravisankar, B.

In: Indian Journal of Engineering and Materials Sciences, Vol. 25, No. 1, 02.2018, p. 69-77.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of built orientation on direct metal laser sintering of TI-6AL-4V

AU - Chandramohan, P.

AU - Bhero, Shepherd

AU - Obadele, Babatunde Abiodun

AU - Olubambi, Peter Apata

AU - Ravisankar, B.

PY - 2018/2

Y1 - 2018/2

N2 - The use of direct metal laser sintering for fabrication of three-dimensional engineering parts is fast gaining momentum in the engineering industries. This process consolidates metallic powders by using a laser source. In this study, the effect of built direction (horizontal and vertical) on the microstructure, mechanical properties and corrosion resistance of Ti-6Al-4V alloy printed using direct metal laser sintering (DMLS) technology was investigated. Results show that microstructure of Ti-6Al-4V surface have few pores. The melt pool of vertically built parts revealed the presence of fine cellular-dendritic martensite. Microhardness of vertical built specimens was relatively higher than the horizontal built specimens which could be due to the presence of vanadium carbide. Fractography analysis revealed that horizontal built specimens displayed higher ductility than the vertical built. For horizontal built sample, the corrosion current densities in 3.5% NaCl and 1 M HCl solutions are significantly lower when compared with that of 1 M H 2 SO 4 , which might be because of stable oxide layer formation. Generally, horizontal build parts yield relatively better mechanical properties and corrosion resistance supported by ideal microstructure. In case of vertical built-up, it is better to limit to a maximum height of 40 mm for the set parameters.

AB - The use of direct metal laser sintering for fabrication of three-dimensional engineering parts is fast gaining momentum in the engineering industries. This process consolidates metallic powders by using a laser source. In this study, the effect of built direction (horizontal and vertical) on the microstructure, mechanical properties and corrosion resistance of Ti-6Al-4V alloy printed using direct metal laser sintering (DMLS) technology was investigated. Results show that microstructure of Ti-6Al-4V surface have few pores. The melt pool of vertically built parts revealed the presence of fine cellular-dendritic martensite. Microhardness of vertical built specimens was relatively higher than the horizontal built specimens which could be due to the presence of vanadium carbide. Fractography analysis revealed that horizontal built specimens displayed higher ductility than the vertical built. For horizontal built sample, the corrosion current densities in 3.5% NaCl and 1 M HCl solutions are significantly lower when compared with that of 1 M H 2 SO 4 , which might be because of stable oxide layer formation. Generally, horizontal build parts yield relatively better mechanical properties and corrosion resistance supported by ideal microstructure. In case of vertical built-up, it is better to limit to a maximum height of 40 mm for the set parameters.

UR - http://www.scopus.com/inward/record.url?scp=85048261237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85048261237&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:85048261237

VL - 25

SP - 69

EP - 77

JO - Indian Journal of Engineering and Materials Sciences

JF - Indian Journal of Engineering and Materials Sciences

SN - 0971-4588

IS - 1

ER -