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

Manufacturing Engineering

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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	American English
Journal	Technologies
Volume	7
DOIs	https://doi.org/10.3390/technologies7020044
State	Published - Jun 12 2019

Disciplines

Mechanical Engineering
Manufacturing
Engineering

Keywords

Ti-6Al-4V
additive manufacturing
defects
micro-CT
porosity

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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 = "Ti-6Al-4V, additive manufacturing, defects, micro-CT, porosity",

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

note = "Publisher Copyright: {\textcopyright} 2019 by the authors.",

year = "2019",

month = jun,

day = "12",

doi = "10.3390/technologies7020044",

language = "American English",

volume = "7",

journal = "Technologies",

issn = "2227-7080",

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TY - JOUR

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

PY - 2019/6/12

Y1 - 2019/6/12

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 - Ti-6Al-4V

KW - additive manufacturing

KW - defects

KW - micro-CT

KW - porosity

UR - https://digitalcommons.georgiasouthern.edu/manufact-eng-facpubs/100

U2 - 10.3390/technologies7020044

DO - 10.3390/technologies7020044

M3 - Article

SN - 2227-7080

VL - 7

JO - Technologies

JF - Technologies

ER -

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

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