Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V

Gigliotti, M F.X.; Gilmore, R S; Perocchi, L C

doi:10.1007/BF02648853

Title: Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V

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Abstract

Nitrogen and oxygen stabilize the alpha phase in titanium. Regions within Ti alloy parts containing high local levels of N and O can stabilize a hard-alpha phase. The ultrasonic properties of titanium-nitrogen-oxygen inclusions within Ti-6Al-4V (Ti64) blocks were measured and related to inclusion chemistry. Sound velocities were measured on Ti-N-O alloy samples that had been prepared by powder metallurgy and ingot-melting techniques. The contributions to sound velocity from oxygen and nitrogen contents were determined. Then, Ti64 blocks were hot isostatic pressing (HIP) bonded to contain inclusions of the Ti-N-O alloys. The signal-to-noise ratios of reflections from uncracked inclusions were found to be an increasing function of inclusion interstitial content and were related to changes in sound velocity with inclusion chemistry. Measurements were made of the reflectance of titanium-nitrogen inclusions in titanium and Ti64.

Authors:

Gigliotti, M F.X.; Gilmore, R S; Perocchi, L C ^[1]

General Electric Co., Schenectady, NY (United States). Corporate Research and Development

Publication Date:: Tue Nov 01 00:00:00 EST 1994

OSTI Identifier:: 6824383

Resource Type:: Journal Article

Journal Name:: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

Additional Journal Information:: Journal Volume: 25:11; Journal ID: ISSN 0360-2133

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; INCLUSIONS; CHEMICAL COMPOSITION; MICROSTRUCTURE; TITANIUM BASE ALLOYS; VANADIUM ALLOYS; EXPERIMENTAL DATA; NITROGEN; PHASE STUDIES; TITANIUM-ALPHA; ULTRASONIC TESTING; ACOUSTIC TESTING; ALLOYS; DATA; ELEMENTS; INFORMATION; MATERIALS TESTING; METALS; NONDESTRUCTIVE TESTING; NONMETALS; NUMERICAL DATA; TESTING; TITANIUM; TITANIUM ALLOYS; TRANSITION ELEMENTS; 360102* - Metals & Alloys- Structure & Phase Studies

Citation Formats


                    Gigliotti, M F.X., Gilmore, R S, and Perocchi, L C. Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V.  United States: N. p., 1994. 
        Web.  doi:10.1007/BF02648853.

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                    Gigliotti, M F.X., Gilmore, R S, & Perocchi, L C. Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V.  United States.  https://doi.org/10.1007/BF02648853

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                    Gigliotti, M F.X., Gilmore, R S, and Perocchi, L C. 1994.  
        "Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V".  United States.  https://doi.org/10.1007/BF02648853.

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@article{osti_6824383,

  title        = {Microstructure and sound velocity of Ti-N-O synthetic inclusions in Ti-6Al-4V},

  author       = {Gigliotti, M F.X. and Gilmore, R S and Perocchi, L C},

  abstractNote = {Nitrogen and oxygen stabilize the alpha phase in titanium. Regions within Ti alloy parts containing high local levels of N and O can stabilize a hard-alpha phase. The ultrasonic properties of titanium-nitrogen-oxygen inclusions within Ti-6Al-4V (Ti64) blocks were measured and related to inclusion chemistry. Sound velocities were measured on Ti-N-O alloy samples that had been prepared by powder metallurgy and ingot-melting techniques. The contributions to sound velocity from oxygen and nitrogen contents were determined. Then, Ti64 blocks were hot isostatic pressing (HIP) bonded to contain inclusions of the Ti-N-O alloys. The signal-to-noise ratios of reflections from uncracked inclusions were found to be an increasing function of inclusion interstitial content and were related to changes in sound velocity with inclusion chemistry. Measurements were made of the reflectance of titanium-nitrogen inclusions in titanium and Ti64.},

  doi          = {10.1007/BF02648853},

  url          = {https://www.osti.gov/biblio/6824383},
  journal      = {Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)},

  issn         = {0360-2133},

  number       = ,

  volume       = 25:11,

  place        = {United States},

  year         = {Tue Nov 01 00:00:00 EST 1994},

  month        = {Tue Nov 01 00:00:00 EST 1994}

}

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