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  • High Pressure Torsion

    Abstract High pressure torsion HPT was conducted under 6.0 GPa on commercial purity titanium up to 10 turns An ultrafine grained UFG pure Ti with an average grain size of 96 nm was obtained The thermal properties of these samples were studied by using differential scanning calorimeter DSC which allowed the quantitative determination

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  • Powder metallurgy of Al CoCrFeNi high entropy alloy

    2020 11 25 state alloy synthesis processes used in the powder metallurgical approach It involves alloying of elemental powders by ball mill ing alloying of elements occurs due to cyclic welding and frac ture phenomenon between alloying elemental powders and subsequently consolidating the ball milled powders by sintering them at high temperature 45 53

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  • Handbook of Mechanical Nanostructuring 2 Volume Set

    Providing in depth information on how to obtain high performance materials by controlling their nanostructures this ready reference covers both the bottom up and the top down approaches to the synthesis and processing of nanostructured materials The focus is on advanced methods of mechanical nanostructuring such as severe plastic deformation including high pressure torsion equal channel

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  • New In Situ Synthesis Method for Fe /Flake Graphite

    2019 7 30 High pressure torsion HPT a severe plastic deformation SPD method is rarely used in the manufacturing process of functional materials In the present work the authors creatively proposed using HPT as an alternative method an approach forhighenergyball millinginthepreparationofanFe3 O4 and lamellar graphite nanosheet GNS composite

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  • High Energy Ball Milling

    High Energy Ball Milling Download or Read online High Energy Ball Milling full in PDF ePub and kindle This book written by Małgorzata Sopicka Lizer and published by Elsevier which was released on 24 May 2010 with total pages 440.

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  • The effect of equal channel angular pressing ECAP on the

    2020 12 6 Saravanan S Kumaresh Babu S Synthesis characterization and ECAP consolidation of carbon nanotube reinforced AA 4032 nanocrystalline composites produced by high energy ball milling J Eng Mater Technol 2015 137 Google Scholar

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  • Enhancing Hydrogen Storage Properties of Metal

    2021 10 21 by high energy ball milling and subsequent annealing J Alloy Compd 456 1 2 211 215 2008 high pressure torsion on the microstructure and hydrogen absorption kinetics of ball milled Mg70Ni30 J Alloy Nanomaterials by Severe Plastic Deformation Nanospd5 Pts 1

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  • Departmental Publication National Institute of Foundry

    Departmental Publication National Institute of Foundry Forge Technology NIFFT Govt Of India S Chakraborty R.Bagla K.Sikdar Debdas Roy A Basumallick Structure Property Relationship in a Bulk Cu Cr W Composite Synthesized by High energy Ball Milling and Spark Plasma Sintering Materials Chemistry and Physics 256 2020 123708.

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  • Deformation‐Induced Supersaturation in Immiscible

    2016 12 19 The review focuses on the supersaturation process of immiscible elements induced by high‐pressure torsion deformation A variety of investigated material systems offers the systematic analysis of the controlling factors for mechanical intermixing which are mainly determined by the level of the positive heat of mixing and the deformation behavior.

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  • PDF Sampling the Cu–Fe–Co phase diagram by severe

    Initial powder mixtures of Cu Fe and Co are exposed to severe plastic deformation by high pressure torsion to prepare solid solutions A broad range of compositions is investigated whereas this study aims at the synthesis of soft magnetic materials and therefore at the formation of a homogeneous and nanocrystalline microstructure For intermediate ferromagnetic contents high pressure

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  • PDF Synthesis of amorphous and metastable Ti40Al60

    Rapid solidification processing Recent studies on the modelling of the high energy of TiAI alloys has been shown to improve both the hot ball milling of elemental powders have pointed out workability and the low temperature ductility of the that there is a strict dependence between the forma y TiAl phase 1 but neither amorphous alloys nor

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  • High pressure torsion for new hydrogen storage materials

    2018 2 19 High pressure torsion HPT is widely used as a severe plastic deformation technique to create ultrafine grained structures with promising mechanical and functional properties Since 2007 the method has been employed to enhance the hydrogenation kinetics in different Mg based hydrogen storage materials.

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  • Code Topic Presenter Title ThP 002 M1 Colin Webb The

    2014 7 15 Nanomaterials Prepared by High Energy Reactive Ball Milling in Hydrogen at the Presence of Mixed Titanium Iron Oxide ThP 096 M2 Morten Brix Ley Electrochemical performance of LiM BH4 3Cl M = La Ce Gd ThP 097 M2 Nicholas Stadie Supercritical Nitrogen Processing a Route to Clean Hydrogen Storage in γ Mg BH4 2

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  • Nanostructuring of metals by severe plastic deformation

    2004 8 1 a High pressure torsion a sample is held between anvils and strained in torsion under applied pressure P .b Equal channel angular pressing a

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  • High Energy Ball Milling

    High Energy Ball Milling Download or Read online High Energy Ball Milling full in PDF ePub and kindle This book written by Małgorzata Sopicka Lizer and published by Elsevier which was released on 24 May 2010 with total pages 440.

    Get Price
  • INT

    Mechanical Synthesis and Properties of Nanomaterials Mechanical Synthesis and Properties of Nanomaterials High pressure torsion driven phase transformations in Cu–Al–Ni High density of shear bands and enhanced free volume induced in Zr₇₀Cu₂₀Ni₁₀ metallic glass by high energy ball milling Shao H Xu Y Shi B Yu

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  • Perspective High pressure transformations in

    2018 10 29 Presently there are few applications of high pressure in the production of new materials or nanomaterials Historically high pressure synthesis has found few real life applications beyond manufacturing of diamond and diamond like materials The major reason for this is the unstable nature of the high pressure phases at ambient conditions.

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  • Handbook of Mechanical Nanostructuring

    2015 3 23 About this book Providing in depth information on how to obtain high performance materials by controlling their nanostructures this ready reference covers both the bottom up and the top down approaches to the synthesis and processing of nanostructured materials The focus is on advanced methods of mechanical nanostructuring such as severe

    Get Price
  • Enhanced dehydrogenation properties of LiAlH4–Mg2NiH4

    2019 4 24 The composites were prepared by ball milling QM 3SP2 Nanjing Nanda Instrument Plant Bare LiAlH 4 –Mg 2 NiH 4 composite with a mole ratio of 4 1 and the composite doped with 3 wt Ti based catalysts TiO 2 Ti and TiF 3 were milled for 3 h at 400 rpm and ball to powder ratio of 40 1.

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  • Deformation‐Induced Supersaturation in Immiscible

    2016 12 19 The review focuses on the supersaturation process of immiscible elements induced by high‐pressure torsion deformation A variety of investigated material systems offers the systematic analysis of the controlling factors for mechanical intermixing which are mainly determined by the level of the positive heat of mixing and the deformation behavior.

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  • 008

    2021 10 13 Ranked 2 nd in top 25 hottest papers in 07 09 2011 Abstract Cryomilled nanocrystalline Al–7.5Mg in wt powders were consolidated by high pressure torsion HPT Consolidation resulted in elongated nanocrystalline grains of ∼30 nm width along the torsion direction and high microhardness values over 3.5 GPa at five rotations in torsion under applied pressures of 6 GPa.

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  • Synthesis of a bulk nanostructured metastable Al alloy

    2019 11 20 Oh ishi K Edalati K Kim HS Hono K Horita Z High pressure torsion for enhanced atomic diffusion and promoting solid state reactions in the aluminum copper system Acta Mater 2013 61 3482–3489 doi 10.1016/j.actamat.2013.02.042 Google Scholar

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  • Effect of Nanostructuring and High Pressure Torsion

    2015 11 6 Carrier doped chalcopyrite CuFeS 2 has been shown to exhibit a high power factor exceeding 1 mW/K 2 m at room temperature.However it has a relatively high thermal conductivity of 6 W/K m in this temperature range To reduce the thermal conductivity nanostructuring by a ball milling process and the high pressure torsion HPT method have been applied to Zn 0.03 Cu 0.97 FeS 2.

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  • High entropy alloys by mechanical alloying A review

    2019 3 1 Mechanical alloying MA of nanocrystalline HEAs has been carried out in high energy ball mills The majority of HEA synthesis by MA utilizes planetary ball mills some of the other variants include SPEX mills and shaker rod mills .Grinding vials and balls of WC hardened chrome steel ZrO 2 and stainless steel have been frequently employed.Both dry and wet millings have been commonly

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  • metals 02 00022

    ball milling followed by High Pressure Torsion HPT 9 The result was a microstructural refinement accompanied with the creation of straining and/or lattice defects Absorption kinetic data indicated that the maximum H absorption capacity was increased by 30–50 after HPT due to the creation of new possible hydrogen absorption sites at the grain boundaries and at lattice defects.

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  • International Journal of Modern Physics B

    2008 7 30 High energy ball milling was performed on a mixture of titanium and aluminum elemental powders with a composition of Ti 48 at Al Stearic acid was added to this powder mixture as a process control agent PCA to study its effect on the microstructure evolution and crystallite size of the milled powder after various milling times.

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  • Microstructure and mechanical properties of CuxNb1 x

    Armco Iron was severely deformed by means of a high performance high pressure torsion HPT tool at a hydrostatic pressure of 5.4 GPa at low homologous temperatures T m between 0.08 and 0.40 T m .

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  • PDF Sampling the Cu–Fe–Co phase diagram by severe

    Initial powder mixtures of Cu Fe and Co are exposed to severe plastic deformation by high pressure torsion to prepare solid solutions A broad range of compositions is investigated whereas this study aims at the synthesis of soft magnetic materials and therefore at the formation of a homogeneous and nanocrystalline microstructure For intermediate ferromagnetic contents high pressure

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  • Author s personal copy

    2014 3 19 during ball milling 17 20 high pressure torsion 21 23 and other processes Current FEM approaches to high pressure torsion 37 42 and twist 43 or spiral 44 45 extrusion consider plastic ow only while these processing methods are used also 21 23 or can be used for strain induced PTs Acknowledgments

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  • Determination of the Heat of Hydride Formation

    2007 10 31 Among the thermodynamic properties of novel materials for solid state hydrogen storage the heat of formation/decomposition of hydrides is the most important parameter to evaluate the stability of the compound and its temperature and pressure of operation In this work the desorption and absorption behaviors of three different classes of hydrides are investigated under different hydrogen

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  • Study of friction stir processing FSP and high pressure

    2011 1 1 5 High Pressure Torsion HPT HPT is a useful process for the investigation of cumulative strain applied pressure and rotational speed on the structure and properties of the material concerned HPT can also be used for the consolidation of nano structured powders such as cryomilled Al 7.5wt Mg structure 21 .

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  • Handbook of Mechanical Nanostructuring

    2015 3 23 About this book Providing in depth information on how to obtain high performance materials by controlling their nanostructures this ready reference covers both the bottom up and the top down approaches to the synthesis and processing of nanostructured materials The focus is on advanced methods of mechanical nanostructuring such as severe

    Get Price
  • Powder metallurgy of Al CoCrFeNi high entropy alloy

    2020 11 25 state alloy synthesis processes used in the powder metallurgical approach It involves alloying of elemental powders by ball mill ing alloying of elements occurs due to cyclic welding and frac ture phenomenon between alloying elemental powders and subsequently consolidating the ball milled powders by sintering them at high temperature 45 53

    Get Price