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

Nandwana, Peeyush; Lee, Yousub; Ranger, Chasen; Rollett, Anthony D.; Dehoff, Ryan R.; Babu, Sudarsanam S.

doi:10.1007/s11661-019-05247-4

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:

^[1];

^[1]; Ranger, Chasen ^[2]; Rollett, Anthony D. ^[2];

^[1]; Babu, Sudarsanam S. ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Publication Date:: Mon May 13 00:00:00 EDT 2019

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:: 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.

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                    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

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                    Nandwana, Peeyush, Lee, Yousub, Ranger, Chasen, Rollett, Anthony D., Dehoff, Ryan R., and Babu, Sudarsanam S. Mon .  
"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.

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@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},

  journal      = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},

  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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Works referencing / citing this record:

Deformation-free geometric recrystallisation in a metastable β-Ti alloy produced by selective laser melting
journal, January 2020

Zafari, Ahmad; Lui, Edward W.; Xia, Kenong
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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

Citation Formats

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

Nucleation of the titanium α and β phases. in situ study of the dislocation role by synchrotron X-ray topography journal, February 1989

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

A simple model to account for the role of microtexture on fatigue and dwell fatigue lifetimes of titanium alloys journal, March 2014

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

Effect of β grain growth on variant selection and texture memory effect during α→β→α phase transformation in Ti–6 Al–4 V journal, February 2012

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

Optimising the mechanical properties of Ti-6Al-4V components produced by wire + arc additive manufacturing with post-process heat treatments journal, July 2018

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

Revealing martensitic transformation and α/β interface evolution in electron beam melting three-dimensional-printed Ti-6Al-4V journal, May 2016

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

In situ investigation of phase transformations in Ti-6Al-4V under additive manufacturing conditions combining laser melting and high-speed micro-X-ray diffraction journal, November 2017

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

Microstructures and mechanical properties of electron beam-rapid manufactured Ti–6Al–4V biomedical prototypes compared to wrought Ti–6Al–4V journal, February 2009

Massive transformation in Ti–6Al–4V additively manufactured by selective electron beam melting journal, February 2016

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

Anisotropic tensile behavior of Ti–6Al–4V components fabricated with directed energy deposition additive manufacturing journal, April 2015

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

Deformation-free geometric recrystallisation in a metastable β-Ti alloy produced by selective laser melting journal, January 2020

Deformation-free geometric recrystallisation in a metastable β-Ti alloy produced by selective laser melting text, January 2020

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

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

Nucleation of the titanium α and β phases. in situ study of the dislocation role by synchrotron X-ray topography
journal, February 1989

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

A simple model to account for the role of microtexture on fatigue and dwell fatigue lifetimes of titanium alloys
journal, March 2014

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

Effect of β grain growth on variant selection and texture memory effect during α→β→α phase transformation in Ti–6 Al–4 V
journal, February 2012

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

Optimising the mechanical properties of Ti-6Al-4V components produced by wire + arc additive manufacturing with post-process heat treatments
journal, July 2018

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

Revealing martensitic transformation and α/β interface evolution in electron beam melting three-dimensional-printed Ti-6Al-4V
journal, May 2016

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

In situ investigation of phase transformations in Ti-6Al-4V under additive manufacturing conditions combining laser melting and high-speed micro-X-ray diffraction
journal, November 2017

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

Microstructures and mechanical properties of electron beam-rapid manufactured Ti–6Al–4V biomedical prototypes compared to wrought Ti–6Al–4V
journal, February 2009

Massive transformation in Ti–6Al–4V additively manufactured by selective electron beam melting
journal, February 2016

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

Anisotropic tensile behavior of Ti–6Al–4V components fabricated with directed energy deposition additive manufacturing
journal, April 2015

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

Deformation-free geometric recrystallisation in a metastable β-Ti alloy produced by selective laser melting
journal, January 2020

Deformation-free geometric recrystallisation in a metastable β-Ti alloy produced by selective laser melting
text, January 2020