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  • Work softening behavior of the ultrafine grained Al alloy

    Commercially pure Al alloy sheets were processed using high strain rate dissimilar channel angular pressing DCAP for as many as 100 passages through a channel with φ = 120 deg to investigate the work hardening caused by a low strain level ε < 2 and the work softening caused by an extremely high strain level 3 < ε < 58 .

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  • A new insight into ductile fracture of ultrafine grained

    2015 4 8 Ultrafine grained Al Mg alloy sheets were fabricated using different rolling techniques at room and cryogenic temperatures It is proposed for the first time that features of the microstructure near the fracture surface can be used to explain the ductile fracture post necking directly We found that as grains are refined to a nano size which

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  • China Ultrafine Grinding Impact Rotor Mill for D50 3

    China Ultrafine Grinding Impact Rotor Mill for D50 3 45um Chemical Industry Find details about China Rotor Mill Rotor Impact Mill from Ultrafine Grinding Impact Rotor Mill for D50 3 45um Chemical IndustryShandong ALPA Powder Technology Co Ltd.

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  • Effect of heat treatments on the microstructures and

    2019 12 16 Effect of heat treatments on the microstructures and tensile properties of an ultrafine grained Al Zn Mg alloy processed by ECAP Mohamed A Afifia Ying Chun Wanga b Pedro Henrique R Pereirac Yi Huangc Yangwei Wanga b Xingwang Chenga b Shukui Lia b Terence G Langdonc aSchool of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

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  • Mechanical Behavior of an Ultrafine/Nano Grained

    2021 10 13 deformation behavior of ultrafine nano grained magnesium alloys The results reported by Zúberová et al 12 indicated that compressive yield strength of an AZ31 alloy was increased after applying four ECAP passes On the other hand strain to failure was found to drop with decreasing grain size However no explanation was given for

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  • On the origin of extremely high strength of ultrafine

    2021 9 1 icantly affects the crystal lattice parameter a of the Al alloys 6 In the alloy 1570 its value is considerably reduced after processing compared to the initial state from a = 4.0765±0.0001 ˚A to a = 4.0692± 0.0003 ˚A The lattice parameter of Al–Mg alloys

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  • Ultrafine Grained AlCoCrFeNi2.1 Eutectic High Entropy

    2020 4 9 High entropy alloys HEAs are multicomponent alloys originally based on the novel alloy design approach of mixing five or more elements in equiatomic or near equiatomic proportions 1 Despite the presence of sev eral constituents the HEAs can show the presence of single phases with simple structure such as FCC or BCC or FCC BCC 1

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  • Yielding behaviour and Hall­–Petch relationship in ultrafine

    2021 2 23 This study investigates yielding behaviour Hall–Petch relationship and strengthening mechanism of ultrafine grained Al–Mg binary alloys Ultrafine grained Al–Mg samples reveal unusual discontinuous yielding and extra Hall–Petch strengthening The

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  • Formation of Bands of Ultrafine Beryllium Particles During

    Formation of bands of ultrafine beryllium particles during rapid solidification of Al Be alloys Modeling and direct observations Acta Materialia 42 4 1065 1080 Abstract Rapid solidification of dilute hyper eutectic and monotectic alloys sometimes produces a dispersion of ultrafine randomly oriented particles that lie in arrays parallel to

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  • TUNING THE STRUCTURE AND THE MECHANICAL

    2018 8 23 PROPERTIES OF ULTRAFINE GRAIN Al–Zn ALLOYS BY SHORT TIME ANNEALING E.V Bobruk1 2 X Sauvage3 A.M Zakirov1 and N.A Enikeev1 2 1I n stiu eofP h ycAd v aM rl US T 12K .x Ufa 450008 Russia 2L abo rtyf M ech n isB ulkN d SP g Uv 28 Universitetsky pr Peterhof Saint Petersburg 198504 Russia

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  • On the origin of extremely high strength of ultrafine

    Ultrafine grained Al alloys produced by high pressure torsion are found to exhibit a very high strength considerably exceeding the Hall Petch predictions for the ultrafine grains The phenomena can be attributed to the unique combination of ultrafine structure and deformation induced segregations of solute elements along grain boundaries which may affect the emission and mobility of

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  • Characteristics of diffusion in Al Mg alloys with

    Equal channel angular pressing ECAP was used to refine the grain sizes of pure Al and an Al–3 wt Mg alloy containing minor additions of either Sc or Zr Following ECAP the grain sizes were in the ultrafine submicrometre range Diffusion couples were prepared from the fine grained material produced by ECAP and from the coarse grained material without ECAP and these couples were used to

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  • PDF Ultrafine versus coarse grained Al 5083 alloys from

    Ultrafine versus coarse grained Al 5083 alloys from low cycle to very high cycle fatigue

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  • A new insight into ductile fracture of ultrafine grained

    2015 4 8 Ultrafine grained Al Mg alloy sheets were fabricated using different rolling techniques at room and cryogenic temperatures It is proposed for the first time that features of the microstructure near the fracture surface can be used to explain the ductile fracture post necking directly We found that as grains are refined to a nano size which

    Get Price
  • what is ultrafine grinding of al alloys

    what is ultrafine grinding of al alloys ultra fine grinding grinding aluminum an analysis of strength and ductility of ultrafine objectives of ultrafine grinding More All About Abrasives All About Abrasiv and for internal grinding wheels Aluminum oxide fused with chrome oxide is a pink broad surface and toolroom grinding on hard alloy

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  • What Is Ultrafine Grinding Of Al Alloys

    2021 7 20 What Is Ultrafine Grinding Of Al Alloys What is ultrafine grinding of al alloys kpprof what is ultrafine grinding of al alloys grinding mill aero vac alloy forge inc productsroudly made in the usa our extensive product offerings include alloy stainless nickel aluminum titanium carbon and cast iron aerovac provides 718 inconel stainless .

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  • what is ultrafine grinding of al alloys

    what is ultrafine grinding of al alloys what is ultrafine grinding of al alloys As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any sizereduction requirements including quarry aggregate and different kinds of minerals We can provide you the complete stone crushing and beneficiation plantWe also supply

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  • Stress corrosion cracking susceptibility of ultrafine

    Abstract General corrosion and stress corrosion cracking SCC behavior of coarse grained fine grained and ultrafine grained UFG AA5083 and Al–Mg–Sc–Zr alloy in different thermomechanical conditions were studied in the present work Friction stir processing FSP was carried out to refine the grain size The average grain size achieved after FSP for AA5083 was 7±3 μm whereas that

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  • Surface Engineering of Aluminum and Aluminum Alloys

    2016 3 29 Ultrafine glass bead blasting is an alternative to wet blasting All aluminum alloys can be safely finished by wet barrel methods Limitations imposed by workpiece size and shape are essentially the same as for steel and other metals There are two gen

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  • Room Temperature Superplasticity in Fine/Ultrafine

    Three Zn Al alloys namely Zn 22Al Zn 5Al and Zn 0.3Al were subjected to equal channel angular pressing ECAP and the effect of ECAP on their microstructure and room temperature RT superplastic behavior were investigated in detail referring to previous studies reported by the authors of the current study ECAP remarkably refined the microstructures of three alloys as compared to their

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  • Machining nickel alloys

    These alloys are best machined in the cold drawn or cold Alloy 800HT N08811 32.5 46.0 21.0 Al Ti 1.0 C 0.08 drawn and stress relieved conditions Allo y 802 N08802 32.5 46.0 21.0 C 0.4 Alloy 270 N02270 99.98 C 0.01 Alloy K 500 unaged N05500 65.5 29.5 1.0 2.7 0.6 Alloy 75 N06075 80.0 19.5

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  • Ultrafine Grinding

    The technology is a sulfate based process employing ultrafine grinding P 80 of 10–15 μm at temperatures of around 85–90 C atmospheric pressure to accelerate the kinetics and increase copper recovery level from chalcopyrite in conventional agitated tanks with corrosion resistant alloy steel shells Nazari et al 2012a Kowalczuk and

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  • Additive manufacturing of ultrafine grained high strength

    Additive manufacturing often known as three dimensional 3D is a process in which a part is built layer by layer and is a promising approach for creating components close to their final net shape This process is challenging the dominance of conventional manufacturing processes for pro

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  • Concurrent strengthening of ultrafine grained age

    2017 5 18 Li Cu alloy but also to other alloys that decompose via spinodal decomposition e.g highly concentrated Al Mg alloys Although there exists different terminology regarding how to indicate the formed zones or phases 12 the phase decomposition sequence of Al Mg alloys with high Mg concentrations can be

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  • Machining of Aluminum and Aluminum Alloys

    2016 4 4 tools with surfaces that are free of grinding marks and scratches Alloys containing more than 10 Si are the most difficult to machine because hard particles of free silicon cause rapid tool wear Alloys containing more than 5 Si will not finish to the bright machined sur faces of other high strength aluminum al

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  • Tensile Deformation of Ultrafine Grained Fe Mn Al Ni C

    To clarify the role of the intermetallic particles in the excellent tensile properties of such alloys the tensile deformation behavior of an ultrafine grained Fe Mn Al Ni C alloy containing austenite matrix and B2 intermetallic particles was investigated by using in situ synchrotron radiation X

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  • Age Hardening in Ultrafine Grained Al 2 Pct Fe Alloy

    The thermal stability of the ultrafine grained structure was verified to exceed 16 days at 373 K 100 C and 12 hours at 473 K 200 C ABA cast Al 2 wt pct Fe alloy was processed by high pressure torsion HPT at room temperature and then subjected to artificial aging

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  • Composite and Surface Functionalization of Ultrafine

    In this study the ultrafine grained Ti23Zr25Nb based composites with 45S5 Bioglass and Ag Cu or Zn additions were produced by application of the mechanical alloying technique Additionally the base Ti23Zr25Nb alloy was electrochemically modified in

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  • Selection of Ultrafine Grinding Equipment for Traditional

    2021 9 9 Among the above mentioned various ultra fine grinding equipments jet mills and vibration mills are widely used Among the jet mills the fluidized bed type jet ultrafine pulverizer is the most widely used Vibration mill is a kind of ultrafine grinding equipment for traditional Chinese medicine with the most research and application.

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  • PDF Microalloying Ultrafine Grained Al Alloys with

    2014 1 8 The mechanical properties of the ultrafine grained UFG Al–1.5Cu wt alloy were investigated The UFG structure was obtained using high pressure torsion HPT technique.

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  • The mechanical behaviour of an ultrafine grained Ti 47Al

    A bulk ultrafine grained UFG Ti 47Al 2Cr at alloy has been produced using a powder metallurgy process that combines high energy mechanical milling HEMM of a mixture of Ti Al and Cr powders to produce a Ti/Al/Cr composite powder and hot isostatic pressing HIP of the composite powder compact.

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  • A new insight into ductile fracture of ultrafine grained

    2020 7 2 Ultrafine grained Al Mg alloy sheets were fabricated using different rolling techniques at room and cryogenic temperatures It is proposed for the first time that features of the microstructure near the fracture surface can be used to explain the ductile fracture post necking directly We found that as grains

    Get Price
  • Achieving room temperature superplasticity in an ultrafine

    2015 2 6 In this report synthesis of an ultrafine grained Zn 22 Al eutectoid alloy was demonstrated through solutionizing followed by thermo mechanical processing Microstructural investigations revealed there are stable equiaxed ultrafine grain sizes of 0.63 μm with homogeneous distributions of Zn and Al

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