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  1. Article: Optical image and Vickers hardness dataset for repair of 1080 steel using additive friction stir deposition of Aermet 100

    Chou, Kathleen / Eff, Michael / Cox, Chase D. / Saukas, Connor / Carroll, Jason

    Data in Brief. 2022 Apr., v. 41

    2022  

    Abstract: This article presents optical images, measurements of heat affected zone depths, and peak Vickers hardness values from the heat affected zone regions of a 1080 steel plate substrate with a machined groove “flaw” repaired using additive friction stir ... ...

    Abstract This article presents optical images, measurements of heat affected zone depths, and peak Vickers hardness values from the heat affected zone regions of a 1080 steel plate substrate with a machined groove “flaw” repaired using additive friction stir deposition of Aermet 100. The deposition of Aermet 100 was performed using a L3 Meld machine with 9.525 mm (0.375 inch) square bar profile Aermet 100 feedstock rods fed through a hollow, 10.16 mm (0.4 inch) diameter, rotating tool onto a 1.02 mm thick 1080 steel plate with a machined groove “flaw” along the plate's length and bisecting the plate's width. The depth of the machined groove “flaw” ranged from 4.7625, 6.35, and 9.525 mm. The data is categorized into four groups: multi-layer builds deposited at room temperature with and without a cooling plate, 2-layer builds deposited at room temperature without a cooling plate, single-layer builds deposited at room temperature without a cooling plate, and a design of experiments for single-layer builds that varied the spindle rotation speed (RPM), travel speed (mm/min), material feed rate (mm/min), and pre-heat temperature (°C) of the deposition. The data shows the parameter conditions that achieved flaw-free consolidated repairs and the associated depth and peak Vickers hardness of the heat affected zone. Optical images of cross-sectioned deposition regions were obtained using an optical microscope with Leco Olympus DP27 macro camera, and Vickers hardness line traces were measured along the depth of the deposited and heat affected zone extending into the substrate on cross-sectioned samples using a Leco LM 247AT microhardness tester. The depth of the heat affected zone is reported as the measured average of five individual data points. Peak values for Vickers hardness for the heat affected zone decreased for pre-heated conditions at 329°C compared to builds conducted at room temperature of 21°C. This dataset provides visual characterization and associated hardness measurements of as-deposited repairs of dissimilar steel alloys. This article can be used to inform parameter selection for additive friction stir deposition of dissimilar steel materials for repair and solid-state additive manufacturing applications.
    Keywords ambient temperature ; cameras ; data collection ; feedstocks ; friction ; hardness ; heat ; light microscopes ; steel
    Language English
    Dates of publication 2022-04
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 2786545-9
    ISSN 2352-3409
    ISSN 2352-3409
    DOI 10.1016/j.dib.2022.107862
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Optical image and Vickers hardness dataset for repair of 1080 steel using additive friction stir deposition of Aermet 100.

    Chou, Kathleen / Eff, Michael / Cox, Chase D / Saukas, Connor / Carroll, Jason

    Data in brief

    2022  Volume 41, Page(s) 107862

    Abstract: This article presents optical images, measurements of heat affected zone depths, and peak Vickers hardness values from the heat affected zone regions of a 1080 steel plate substrate with a machined groove "flaw" repaired using additive friction stir ... ...

    Abstract This article presents optical images, measurements of heat affected zone depths, and peak Vickers hardness values from the heat affected zone regions of a 1080 steel plate substrate with a machined groove "flaw" repaired using additive friction stir deposition of Aermet 100. The deposition of Aermet 100 was performed using a L3 Meld machine with 9.525 mm (0.375 inch) square bar profile Aermet 100 feedstock rods fed through a hollow, 10.16 mm (0.4 inch) diameter, rotating tool onto a 1.02 mm thick 1080 steel plate with a machined groove "flaw" along the plate's length and bisecting the plate's width. The depth of the machined groove "flaw" ranged from 4.7625, 6.35, and 9.525 mm. The data is categorized into four groups: multi-layer builds deposited at room temperature with and without a cooling plate, 2-layer builds deposited at room temperature without a cooling plate, single-layer builds deposited at room temperature without a cooling plate, and a design of experiments for single-layer builds that varied the spindle rotation speed (RPM), travel speed (mm/min), material feed rate (mm/min), and pre-heat temperature (°C) of the deposition. The data shows the parameter conditions that achieved flaw-free consolidated repairs and the associated depth and peak Vickers hardness of the heat affected zone. Optical images of cross-sectioned deposition regions were obtained using an optical microscope with Leco Olympus DP27 macro camera, and Vickers hardness line traces were measured along the depth of the deposited and heat affected zone extending into the substrate on cross-sectioned samples using a Leco LM 247AT microhardness tester. The depth of the heat affected zone is reported as the measured average of five individual data points. Peak values for Vickers hardness for the heat affected zone decreased for pre-heated conditions at 329°C compared to builds conducted at room temperature of 21°C. This dataset provides visual characterization and associated hardness measurements of as-deposited repairs of dissimilar steel alloys. This article can be used to inform parameter selection for additive friction stir deposition of dissimilar steel materials for repair and solid-state additive manufacturing applications.
    Language English
    Publishing date 2022-01-22
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2786545-9
    ISSN 2352-3409 ; 2352-3409
    ISSN (online) 2352-3409
    ISSN 2352-3409
    DOI 10.1016/j.dib.2022.107862
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Data on the early oxidation of SiO2-coated pure Ti and bulk Ti5Si3 at 800 °C

    Chou, Kathleen / Chu, Peng-Wei / Marquis, Emmanuelle A.

    Data in Brief. 2018 Oct., v. 20

    2018  

    Abstract: Oxidation of pure Ti sputtered with a 250 nm layer of amorphous SiO₂ and bulk Ti₅Si₃ was conducted at 800 °C for 2 or 32 h in a 1 standard cubic centimeter per minute (SCCM) O₂/4 SCCM Ar environment (approximately pO₂ = 0.2 atm/20.3 kPa). Specimens were ... ...

    Abstract Oxidation of pure Ti sputtered with a 250 nm layer of amorphous SiO₂ and bulk Ti₅Si₃ was conducted at 800 °C for 2 or 32 h in a 1 standard cubic centimeter per minute (SCCM) O₂/4 SCCM Ar environment (approximately pO₂ = 0.2 atm/20.3 kPa). Specimens were characterized using transmission electron microscopy, scanning transmission electron microscopy, and energy dispersive spectroscopy. The data in this article accompanies research article “Early oxidation behavior of Si-coated titanium” [1], which contains further discussion. The data for this article is hosted at the Materials Commons data repository and is available for download at https://materialscommons.org/mcapp/#/data/dataset/b8bc8038-a735-4cb9-9a9e-a0fb912b248c.
    Keywords energy-dispersive X-ray analysis ; oxidation ; titanium ; transmission electron microscopy
    Language English
    Dates of publication 2018-10
    Size p. 1263-1268.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 2786545-9
    ISSN 2352-3409
    ISSN 2352-3409
    DOI 10.1016/j.dib.2018.08.173
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Data on the early oxidation of SiO

    Chou, Kathleen / Chu, Peng-Wei / Marquis, Emmanuelle A

    Data in brief

    2018  Volume 20, Page(s) 1263–1268

    Abstract: Oxidation of pure Ti sputtered with a 250 nm layer of amorphous ... ...

    Abstract Oxidation of pure Ti sputtered with a 250 nm layer of amorphous SiO
    Language English
    Publishing date 2018-09-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2786545-9
    ISSN 2352-3409
    ISSN 2352-3409
    DOI 10.1016/j.dib.2018.08.173
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Influence of a silicon-bearing film on the early stage oxidation of pure titanium

    Chou, Kathleen / Peng-Wei Chu / Carlos G. Levi / Emmanuelle A. Marquis

    Journal of materials science. 2017 Aug., v. 52, no. 16

    2017  

    Abstract: Oxidation of pure titanium with and without silicon-bearing thin films was investigated using transmission electron microscopy, X-ray energy-dispersive spectroscopy, and nanoindentation to understand the initial stages of scale formation mechanisms. For ... ...

    Abstract Oxidation of pure titanium with and without silicon-bearing thin films was investigated using transmission electron microscopy, X-ray energy-dispersive spectroscopy, and nanoindentation to understand the initial stages of scale formation mechanisms. For pure titanium, results showed a two-layer oxide scale with dense outer and porous inner layers attributed to the simultaneous outward titanium and inward oxygen diffusion fluxes assessed through the use of a marker layer. Titanium specimens coated with Si before oxidation yielded a thinner oxide with an outer columnar scale and minimal porous inner oxide growth. These findings suggest that Si hinders oxygen transport to the oxide/metal interface, thus reducing overall oxide growth and oxygen ingress into the titanium metal substrate over short-term exposures.
    Keywords oxidation ; oxygen ; silicon ; titanium ; transmission electron microscopy
    Language English
    Dates of publication 2017-08
    Size p. 9884-9894.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2015305-3
    ISSN 1573-4803 ; 0022-2461
    ISSN (online) 1573-4803
    ISSN 0022-2461
    DOI 10.1007/s10853-017-1143-1
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Beads on a Chain (BoC) Polymers with Model Dendronized Beads. Copolymerization of [(4-NH2C6H4SiO1.5)6(IPhSiO1.5)2] and [(4-CH3OC6H4SiO1.5)6(IPhSiO1.5)2] with 1,4-Diethynylbenzene (DEB) Gives Through-Chain, Extended 3-D Conjugation in the Excited State That Is an Average of the Corresponding Homopolymers

    Jung, Jae Hwan / Chou Kathleen / Clark Sarah / Furgal JosephC / Laine Richard M / Schwartz Matthew

    Macromolecules. 2013 Oct. 08, v. 46, no. 19

    2013  

    Abstract: The general objectives of the work reported here and in accompanying papers are to identify optimal tools for the synthesis of silsesquioxane (SQ)-based BoC oligomers and polymers, especially those that show 3-D, through-chain (cage) conjugation in the ... ...

    Abstract The general objectives of the work reported here and in accompanying papers are to identify optimal tools for the synthesis of silsesquioxane (SQ)-based BoC oligomers and polymers, especially those that show 3-D, through-chain (cage) conjugation in the excited state. Here we first examine the utility of polymerizing (p-IPhSiO1.5)8 with divinylbenzene (DVB) using Heck catalytic cross-coupling as baseline systems for BoCs with model dendrons. Thereafter, we functionalize the remaining IPh groups by cross-coupling with 4-MeOC6H4CHCH2 or 4-NH2C6H4CHCH2. As an alternate approach, we first functionalize (p-IPhSiO1.5)8 with 4-MeOC6H4CHCH2 or 4-NH2C6H4CHCH2 by catalytic cross-coupling such that only an average of two iodophenyls remain and then polymerized with DVB or 1,4-diethynylbenzne (DEB). This latter approach permits synthesis of copolymers as demonstrated using 1:1 mixtures of the two SQs with R = NH2 or OMe. Here we assess the utility of two different routes to conjugated BoC polymers. Investigation of the UV–vis absorption and emission properties of these BoCs indicates the DVB polymers exhibit no emission red-shifts because a significant portion of the DVB used is the 1,3-isomer. However, the DEB polymers reveal ∼40 nm red-shifts and charge transfer (CT) behavior, suggesting electronic interactions between SQ cages through the conjugated, bridging moieties. DEB copolymers with R = NH2– and MeO–stilbene functional groups on the cages show red-shifts intermediate between the red-shifts of the simple homopolymers, rather than independent emissions from both units as would obtain with a physical mixture again supporting electronic communication along the polymer chains and through the cages via the conjugated linkers.
    Keywords composite polymers ; copolymerization ; cross-coupling reactions ; emissions ; models ; moieties ; ultraviolet-visible spectroscopy
    Language English
    Dates of publication 2013-1008
    Size p. 7580-7590.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1491942-4
    ISSN 1520-5835 ; 0024-9297
    ISSN (online) 1520-5835
    ISSN 0024-9297
    DOI 10.1021%2Fma401422t
    Database NAL-Catalogue (AGRICOLA)

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