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Title: Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting

Abstract

Additively manufactured Ti-6Al-4V has columnar β grains along the build direction with a ⟨001⟩ fiber texture. Due to Burgers Orientation Relationship, the resulting α phase becomes textured albeit less strongly than the β phase. Microtexture zones have been identified in the α phase in laser-based systems. There have been limited studies on α phase texture and its impact on mechanical behavior of Ti-6Al-4V fabricated via electron beam melting (EBM) powder bed additive manufacturing along with the use of super-transus heat treatments to modify the resulting α phase texture. We present the role of texture on influencing the tensile behavior of EBM Ti-6Al-4V. We observed that super-transus heat treatment of the alloy also results in columnar to equiaxed transition of β grains with a subsequent change in α phase texture. Possible mechanisms for the formation of equiaxed β are reported on.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [2]; ORCiD logo [1];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1546541
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 50; Journal Issue: 7; Journal ID: ISSN 1073-5623
Publisher:
ASM International
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Ti-6Al-4V; Additive Manufacturing; Martensite Decomposition; Texture; Phase; Transformation

Citation Formats

Nandwana, Peeyush, Lee, Yousub, Ranger, Chasen, Rollett, Anthony D., Dehoff, Ryan R., and Babu, Sudarsanam S. Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting. United States: N. p., 2019. Web. doi:10.1007/s11661-019-05247-4.
Nandwana, Peeyush, Lee, Yousub, Ranger, Chasen, Rollett, Anthony D., Dehoff, Ryan R., & Babu, Sudarsanam S. Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting. United States. https://doi.org/10.1007/s11661-019-05247-4
Nandwana, Peeyush, Lee, Yousub, Ranger, Chasen, Rollett, Anthony D., Dehoff, Ryan R., and Babu, Sudarsanam S. 2019. "Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting". United States. https://doi.org/10.1007/s11661-019-05247-4. https://www.osti.gov/servlets/purl/1546541.
@article{osti_1546541,
title = {Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting},
author = {Nandwana, Peeyush and Lee, Yousub and Ranger, Chasen and Rollett, Anthony D. and Dehoff, Ryan R. and Babu, Sudarsanam S.},
abstractNote = {Additively manufactured Ti-6Al-4V has columnar β grains along the build direction with a ⟨001⟩ fiber texture. Due to Burgers Orientation Relationship, the resulting α phase becomes textured albeit less strongly than the β phase. Microtexture zones have been identified in the α phase in laser-based systems. There have been limited studies on α phase texture and its impact on mechanical behavior of Ti-6Al-4V fabricated via electron beam melting (EBM) powder bed additive manufacturing along with the use of super-transus heat treatments to modify the resulting α phase texture. We present the role of texture on influencing the tensile behavior of EBM Ti-6Al-4V. We observed that super-transus heat treatment of the alloy also results in columnar to equiaxed transition of β grains with a subsequent change in α phase texture. Possible mechanisms for the formation of equiaxed β are reported on.},
doi = {10.1007/s11661-019-05247-4},
url = {https://www.osti.gov/biblio/1546541}, journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
issn = {1073-5623},
number = 7,
volume = 50,
place = {United States},
year = {Mon May 13 00:00:00 EDT 2019},
month = {Mon May 13 00:00:00 EDT 2019}
}

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Cited by: 18 works
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Works referenced in this record:

Austenite Reconstruction Elucidates Prior Grain Size Dependence of Toughness in a Low Alloy Steel
journal, July 2018


The effect of microstructure and texture on mechanical properties of Ti6-4
journal, November 2009


Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM)
journal, February 2017


Effects of post-processing on cyclic fatigue response of a titanium alloy additively manufactured by electron beam melting
journal, January 2017


Influence of tempering temperature and time on the α′-Ti-6Al-4V martensite
journal, February 1996


Impact of texture on mechanical properties in an advanced titanium alloy
journal, December 2001


Effect of microtexture on fatigue cracking in Ti–6Al–4V
journal, September 2007


Phase transformations during cooling in α+β titanium alloys
journal, March 1998


Microstructure and mechanical behavior of Ti–6Al–4V produced by rapid-layer manufacturing, for biomedical applications
journal, January 2009


The Origin of Microstructural Diversity, Texture, and Mechanical Properties in Electron Beam Melted Ti-6Al-4V
journal, August 2010


Effect of crystallographic texture on the isothermal beta grain-growth kinetics of Ti–6Al–4V
journal, July 2002


Variant Selection During Cooling after Beta Annealing of Ti-6Al-4V Ingot Material
journal, June 2012


Texture effects under tension and torsion loading conditions in titanium alloys
journal, October 2005


Influence of texture on fatigue properties of Ti-6Al-4V
journal, August 1984


Electron beam melted Ti–6Al–4V: Microstructure, texture and mechanical behavior of the as-built and heat-treated material
journal, January 2016


Crystallography of Fatigue Crack Initiation and Growth in Fully Lamellar Ti-6Al-4V
journal, November 2009


Heterogeneous nucleation during the titanium αaiβ transformation studied by Synchrotron X-ray topography
journal, November 1988


Texture Evolution During Laser Direct Metal Deposition of Ti-6Al-4V
journal, January 2016


The role of microtexture on the faceted fracture morphology in Ti–6Al–4V subjected to high-cycle fatigue
journal, June 2010


Works referencing / citing this record: