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      KCI등재 SCI SCIE SCOPUS

      Microstructure‑Strengthening Interrelationship of an Ultrasonically Treated Hypereutectic Al–Si (A390) Alloy

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      https://www.riss.kr/link?id=A105941019

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      다국어 초록 (Multilingual Abstract)

      Ultrasonic melt treatment (UST) was applied to an A390 hypereutectic Al–Si alloy in a temperature range of 750–800 °Cand its influence on the solidification structure and the consequent increase in strength was investigated. UST at such a hightem...

      Ultrasonic melt treatment (UST) was applied to an A390 hypereutectic Al–Si alloy in a temperature range of 750–800 °Cand its influence on the solidification structure and the consequent increase in strength was investigated. UST at such a hightemperature, which is about 100 °C above the liquidus temperature, had little effect on the grain refinement but enhanced thehomogeneity of the microstructure with the uniform distribution of constituent phases (e.g. primary Si, α-Al and intermetallics)significantly refined. With the microstructural homogeneity, quantitative analysis confirmed that UST was found tosuppress the formation of Cu-bearing phases, i.e., Q-Al5Cu2Mg8Si6, Al2Cuphases that form in the final stage of solidificationwhile notably increasing the average Cu contents in the matrix from 1.29 to 2.06 wt%. A tensile test exhibits an increasein the yield strength of the as-cast alloy from 185 to 208 MPa, which is mainly associated with the solute increment withinthe matrix. The important role of UST in the microstructure evolution during solidification is discussed and the mechanismcovering the microstructure-strengthening interrelationship of the ultrasonically treated A390 alloy is proposed.

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      참고문헌 (Reference)

      1 G.I. Eskin, "Ultrasonic Treatment of Light Alloy Melts" Gordon and Breach Science Publishers 1998

      2 P. Kapranos, "Thixoforming of an automotive part in A390 hypereutectic Al–Si alloy" 135 : 271-277, 2003

      3 G. Wang, "The role of ultrasonic treatment in refining the as-cast grain structure during the solidification of an Al–2Cu alloy" 408 : 119-124, 2014

      4 L. Ding, "The natural aging and precipitation hardening behaviour of Al–Mg–Si–Cu alloys with different Mg/Si ratios and Cu additions" 627 : 119-126, 2015

      5 H. Puga, "The combined effect of melt stirring and ultrasonic agitation on the degassing efficiency of AlSi9Cu3 alloy" 63 : 2089-2092, 2009

      6 J. -G. Jung, "Synergistic effect of ultrasonic melt treatment and fast cooling on the refinement of primary Si in a hypereutectic Al–Si alloy" 144 : 31-40, 2018

      7 X.T. Li, "Study of ultrasonic melt treatment on the quality of horizontal continuously cast Al–1%Si alloy" 13 (13): 121-125, 2006

      8 T.W. Clyne, "Solute redistribution during solidification with rapid solid state diffusion" 12A : 965-971, 1981

      9 V. Abramov, "Solidification of aluminium alloys under ultrasonic irradiation using watercooled resonator" 37 : 27-34, 1998

      10 M.C. Flemings, "Solidification Processing" McGraw-Hill 1974

      1 G.I. Eskin, "Ultrasonic Treatment of Light Alloy Melts" Gordon and Breach Science Publishers 1998

      2 P. Kapranos, "Thixoforming of an automotive part in A390 hypereutectic Al–Si alloy" 135 : 271-277, 2003

      3 G. Wang, "The role of ultrasonic treatment in refining the as-cast grain structure during the solidification of an Al–2Cu alloy" 408 : 119-124, 2014

      4 L. Ding, "The natural aging and precipitation hardening behaviour of Al–Mg–Si–Cu alloys with different Mg/Si ratios and Cu additions" 627 : 119-126, 2015

      5 H. Puga, "The combined effect of melt stirring and ultrasonic agitation on the degassing efficiency of AlSi9Cu3 alloy" 63 : 2089-2092, 2009

      6 J. -G. Jung, "Synergistic effect of ultrasonic melt treatment and fast cooling on the refinement of primary Si in a hypereutectic Al–Si alloy" 144 : 31-40, 2018

      7 X.T. Li, "Study of ultrasonic melt treatment on the quality of horizontal continuously cast Al–1%Si alloy" 13 (13): 121-125, 2006

      8 T.W. Clyne, "Solute redistribution during solidification with rapid solid state diffusion" 12A : 965-971, 1981

      9 V. Abramov, "Solidification of aluminium alloys under ultrasonic irradiation using watercooled resonator" 37 : 27-34, 1998

      10 M.C. Flemings, "Solidification Processing" McGraw-Hill 1974

      11 "Smithells Metals Reference Book" Elsevier Butterworth-Heinemann 2004

      12 G. Wang, "Role of ultrasonic treatment, inoculation and solute in the grain refinement of commercial purity aluminium" 7 : 9-, 2017

      13 X. Jian, "Refinement of eutectic silicon phase of aluminum A356 alloy using high-intensity ultrasonic vibration" 54 : 893-896, 2006

      14 M. Prokic, "Multifrequency ultrasonic structural actuators"

      15 C. L. Xu, "Morphologies of primary silicon in hypereutectic Al-Si alloys with melt overheating temperature and cooling rate" 437 (437): 451-455, 2006

      16 H. R. Kotdia, "Modification of solidification microstructure in hypo- and hyper-eutectic Al–Si alloys under high-intensity ultrasonic irradation" 620 : 1-4, 2015

      17 O.R. Myhr, "Modelling of the age hardening behaviour of Al–Mg–Si alloys" 49 : 65-75, 2001

      18 L.J. Colley, "Microstructure-yield strength models for heat treatment of Al–Si–Mg casting alloy II: modelling microstructure and yield strength evolution" 53 (53): 138-150, 2014

      19 I.G. Brodova, "Liquid Metal Processing" Taylor & Francis 2002

      20 L. Zhang, "Light Metals 2012" Wiley 999-1004, 2012

      21 Y.-H. Cho, "Influence of ultrasonic treatment on the microstructure of hypoeutectic Al–17wt%Si alloys" 794–796 : 89-94, 2014

      22 H. Puga, "Influence of ultrasonic melt treatment on microstructure and mechanical properties of AlSi9Cu3 alloy" 211 : 1729-1735, 2011

      23 H. Puga, "Influence of indirect ultrasonic vibration on the microstructure and mechanical behavior of Al–Si–Cu alloy" 560 : 589-595, 2013

      24 J. G. Jung, "Improved mechanical properties of near-eutectic Al–Si piston alloy through ultrasonic melt treatment" 669 : 187-195, 2016

      25 "FactSage"

      26 R. Chen, "Effects of ultrasonic vibration on the microstructure and mechanical properties of high alloying TiAl" 7 : 41463-, 2017

      27 A.K. Gupta, "Effects of silicon additions on aging behaviour of Al–1.52Cu–0.75Mg alloy" 5 : 52-55, 1989

      28 X. Jian, "Effect of power ultrasound on solidification of aluminum A356 alloy" 59 : 190-193, 2005

      29 W.J. Kyffin, "Effect of phosphorus additions on the spacing between primary silicon particles in a Bridgman solidified hypereutectic Al–Si alloy" 36 : 2667-2672, 2001

      30 P. Li, "Effect of melt overheating, cooling and solidification rates on Al–16wt%Si alloy structure" 332 (332): 371-374, 2002

      31 A. Das, "Effect of high-intensity ultrasonic irradiation on the modification of solidification microstructure in a Sirich hypoeutectic Al–Si alloy" 125 : 853-859, 2011

      32 T.A. Atamanenko, "Criteria of grain refinement induced by ultrasonic melt treatment of aluminum alloys containing Zr and Ti" 41A : 2056-2066, 2010

      33 C.L. Xu, "Cooling rate and microstructure of rapidly solidified Al–20wt%Si alloy" 417 (417): 275-280, 2006

      34 G. I. Eskin, "Cavitation mechanism of ultrasonic melt degassing" 2 (2): 137-141, 1995

      35 G. I. Eskin, "Broad prospects for commercial application of the ultrasonic (cavitation) melt treatment of light alloys" 8 : 319-325, 2001

      36 L.F. Mondolfo, "Aluminum Alloys: Structure and Properties" Butterworth & Co 1976

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