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Title: Correlations Between Powder Feedstock Quality, In Situ Porosity Detection, and Fatigue Behavior of Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting: A Step Towards Qualification

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
ORCiD logo [1];  [1];  [2];  [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division. Manufacturing Demonstration Facility
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility. Electrical and Electronics Systems Research Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace, and Biomedical Engineering

Ti-6Al-4V is the most studied alloy via electron beam melting (EBM) with regards to microstructure and mechanical behavior, but there have been no attempts to correlate in situ porosity detection and fatigue behavior. This is required for widespread adoption of EBM because conventional evaluation is often time-consuming and expensive. This study presents the use of near-infrared imaging to detect and quantify porosity in Ti-6Al-4V builds fabricated from different powder feedstocks and its correlation to their fatigue response. Finally, we report that, for identical processing parameters, the variability in powder feedstock causes variations in porosity and scatter in the respective fatigue response.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1474677
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Journal Name: JOM. Journal of the Minerals, Metals & Materials Society Journal Issue: 9 Vol. 70; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (21)

In situ flaw detection by IR‐imaging during electron beam melting journal June 2012
Impact of texture on mechanical properties in an advanced titanium alloy journal December 2001
Effects of post-processing on cyclic fatigue response of a titanium alloy additively manufactured by electron beam melting journal January 2017
Titanium book January 2003
Evaluation of Orientation Dependence of Fracture Toughness and Fatigue Crack Propagation Behavior of As-Deposited ARCAM EBM Ti-6Al-4V journal February 2015
Closed-loop automatic feedback control in electron beam melting journal January 2015
Evaluating the Effect of Processing Parameters on Porosity in Electron Beam Melted Ti-6Al-4V via Synchrotron X-ray Microtomography journal January 2016
Solidification and solid-state transformation sciences in metals additive manufacturing journal July 2017
Influence of microstructure on high-cycle fatigue of Ti-6Al-4V: Bimodal vs. lamellar structures journal March 2002
On the mechanical behaviour of titanium alloy TiAl6V4 manufactured by selective laser melting: Fatigue resistance and crack growth performance journal March 2013
Location specific solidification microstructure control in electron beam melting of Ti-6Al-4V journal January 2018
Massive transformation in Ti–6Al–4V additively manufactured by selective electron beam melting journal February 2016
Metal Additive Manufacturing: A Review of Mechanical Properties journal July 2016
Microstructure and mechanical behavior of Ti–6Al–4V produced by rapid-layer manufacturing, for biomedical applications journal January 2009
Effects of the microstructure and porosity on properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM) journal April 2016
Improvement of fatigue resistance and ductility of TiAl6V4 processed by selective laser melting journal June 2015
Effects of defects, inclusions and inhomogeneities on fatigue strength journal April 1994
Anisotropic high cycle fatigue behavior of Ti–6Al–4V obtained by powder bed laser fusion journal January 2017
Defect distribution and microstructure heterogeneity effects on fracture resistance and fatigue behavior of EBM Ti–6Al–4V journal January 2017
Influence of texture on fatigue properties of Ti-6Al-4V journal August 1984
DREAM.3D: A Digital Representation Environment for the Analysis of Microstructure in 3D journal April 2014

Cited By (3)

Fatigue Performance of Additively Manufactured Ti-6Al-4V: Surface Condition vs. Internal Defects journal January 2020
In Operando Monitoring by Analysis of Backscattered Electrons during Electron Beam Melting journal December 2019
Powder Recycling Effects on the Tensile and Fatigue Behavior of Additively Manufactured Ti-6Al-4V Parts journal November 2018