Preparation and Growth Characterization of Al2Cu Phase Crystal with the Single Orientation Under Directional Solidification

Gao, Ka; Xu, Yueyang; Song, Wenzheng; Guan, Li; Li, Mingliang; Li, Kewei; Guo, Xiaoqin; Zhang, Rui

doi:10.1590/1980-5373-mr-2018-0381

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…This phenomenon is well known and commonly observed in different tetragonal intermetallic materials (e.g. [42]). EBSD maps of the vertical sections (Fig.…”

Section: Ebsdmentioning

confidence: 61%

From arc-melted ingot to MTR fuel plate: A SEM/EBSD microstructural study of U3Si2

Havette

Iltis

Palancher

et al. 2020

Journal of Nuclear Materials

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U 3 Si 2 /Al fuel plates are widely used in Material Testing Reactors (MTRs) as Low Enriched Uranium driver fuel. In this paper, a reinvestigation of the microstructure of U 3 Si 2 particles is proposed to take full advantage of the new capabilities offered by Electron BackScattered Diffraction (EBSD) techniques.Using EBSD we demonstrate that most particles are single crystalline in as-fabricated plates. To understand this characteristic, linked to the microstructure of the starting material, an in-depth study of U 3 Si 2 ingots produced by arc-melting was performed at a laboratory scale; they were extensively characterized by EBSD, scanning electron microscope, energy dispersive spectroscopy and X-ray diffraction. It is shown that U 3 Si 2 grain may be large (up to several thousands of micrometers) and that they exhibit a strong preferential orientation, linked to the axial thermal gradient created in the arcmelting chamber. A significant impact of the cooling rate after arc-melting on the ingot microstructure is noticed: grains are smaller and more columnar when the cooling rate is high. A deviation from 3U/2Si stoichiometry caused for example by impurities induces the formation of a secondary phase, which exhibits a square spiral morphology.We then demonstrate that the cooling rate of U 3 Si 2 ingots has a direct influence on the characteristics of the powders obtained by crushing these ingots. Indeed the powder obtained from "slow" cooled ingots is found very close to the powder used for industrial MTR plates. On the contrary particles obtained from "fast" cooled ingots, are polycrystalline and more resistant to crushing. Thus, this work provides significant advances both in the characterisation of technological products like U 3 Si 2 /Al MTR plates and in more basic knowledge about the U 3 Si 2 phase formation.

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“…This phenomenon is well known and commonly observed in different tetragonal intermetallic materials (e.g. [42]). EBSD maps of the vertical sections (Fig.…”

Section: Ebsdmentioning

confidence: 61%

From arc-melted ingot to MTR fuel plate: A SEM/EBSD microstructural study of U3Si2

Havette

Iltis

Palancher

et al. 2020

Journal of Nuclear Materials

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“…%) 13) . Therefore, it is judged that the microstructure of the part where the high-strength steel base metal is melted in a small amount is precipitation of primary ferrite(α-Fe) and Al-Cu intermetallic compound(Al 4 Cu 9 ), which is a dark gray phase in the Cu matrix 14) . Fig.…”

Section: Microstructure Of Weld Zonementioning

confidence: 99%

Study on the Microstructure and Mechanical Properties of Butt GMAW Al/Fe Dissimilar Joints using Pure Copper Filler Metal

Jung

Park

Baek

2021

Journal of Welding and Joining

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The automobile industry is required to reduce the automotive exhaust emissions and enhance fuel efficiency by reducing the weight of the vehicle body (lightweight body) and increasing the strength of the vehicle. To manufacture a lightweight body, there have been numerous studies on Al/Fe dissimilar joining globally. However, the biggest problem of those studies was the formation of the Al-Fe intermetallic compound (IMC) layer, which broke the weld metal on the Al-Fe IMC layer. Therefore, in this study, Al/Fe dissimilar joining using gas metal arc welding using pure copper (Cu) filler metal was proposed to solve the aforementioned issues. As the travel speed increased 5 to 9 mm/s, the temperature gradient and crystal cooling rate increased. This made the Al-Cu Eutectic and Hypereutectic Zone to be narrow and dendrite α-Al Zone to be wide in the Al-based weld zone (Weld Zone Ⅱ). From the travel speed of 8 mm/s, the hardness at the Weld Zone Ⅱ is lower than the under the travel of 7 mm/s. The tensile test results for fracture was observed in the Al base metal.

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Advent of a Wide-Band-Gap Semiconducting Low-Density Material Possessing Significantly High Specific Hardness

Jaiswal

Maji

Chakrabarty

et al. 2020

J. of Materi Eng and Perform

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Preparation and Growth Characterization of Al2Cu Phase Crystal with the Single Orientation Under Directional Solidification

Cited by 8 publications

References 22 publications

From arc-melted ingot to MTR fuel plate: A SEM/EBSD microstructural study of U3Si2

From arc-melted ingot to MTR fuel plate: A SEM/EBSD microstructural study of U3Si2

Study on the Microstructure and Mechanical Properties of Butt GMAW Al/Fe Dissimilar Joints using Pure Copper Filler Metal

Advent of a Wide-Band-Gap Semiconducting Low-Density Material Possessing Significantly High Specific Hardness

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