Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

Haijun Gong; Venkata Karthik Nadimpalli; Khalid Rafi; Thomas Starr; Brent Stucker

doi:10.3390/technologies7020044

Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

Haijun Gong^*, Venkata Karthik Nadimpalli, Khalid Rafi, Thomas Starr, Brent Stucker

^*Corresponding author for this work

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Abstract

In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan.

Original language	English
Article number	44
Journal	Technologies
Volume	7
Issue number	2
Pages (from-to)	12
ISSN	2227-7080
DOIs	https://doi.org/10.3390/technologies7020044
Publication status	Published - 2019

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords

Micro-CT
Defects
Porosity
Ti-6Al-4V
Additive manufacturing

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title = "Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing",

abstract = "In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan.",

keywords = "Micro-CT, Defects, Porosity, Ti-6Al-4V, Additive manufacturing",

author = "Haijun Gong and Nadimpalli, {Venkata Karthik} and Khalid Rafi and Thomas Starr and Brent Stucker",

note = "This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.",

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language = "English",

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T1 - Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

AU - Gong, Haijun

AU - Nadimpalli, Venkata Karthik

AU - Rafi, Khalid

AU - Starr, Thomas

AU - Stucker, Brent

N1 - This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PY - 2019

Y1 - 2019

N2 - In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan.

AB - In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan.

KW - Micro-CT

KW - Defects

KW - Porosity

KW - Ti-6Al-4V

KW - Additive manufacturing

U2 - 10.3390/technologies7020044

DO - 10.3390/technologies7020044

M3 - Journal article

SN - 2227-7080

VL - 7

SP - 12

JO - Technologies

JF - Technologies

IS - 2

M1 - 44

ER -

Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

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