Mechanism of grain refinement in aluminium

Mohanty, Prasanna; Gruzleski, J. E.

doi:10.1016/0956-7151(94)00405-7

Cited by 463 publications

(256 citation statements)

References 20 publications

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“…As it was shown by Dahle et al [9] it is possible to reduce compound alloy to binary alloy in terms of calculating diffusion coefficients and growth restriction parameters with additive rule. It was successively used for aluminium alloys [12]. According to additive rule, desired parameter, K, can be approximated with following formula:…”

Section: Compound Alloys Reduction To Binary Alloymentioning

confidence: 99%

Model of Dendrite Growth in Metallic Alloys

Żak¹,

Lelito²,

Krajewski³

et al. 2010

mafe

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Section: Compound Alloys Reduction To Binary Alloymentioning

confidence: 99%

Model of Dendrite Growth in Metallic Alloys

Żak¹,

Lelito²,

Krajewski³

et al. 2010

mafe

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“…This can also be related to the fading of the potential nuclei probably due to the gravity action of the TiB 2 compound. 18 …”

Section: Effects Of the Holding Time And Melt Stirring On The Grain Sizementioning

confidence: 99%

Investigation of the effect of holding time and melt stirring on the grain refinement of an A206 alloy

Akar¹,

Tanyel²,

Kocatepe³

et al. 2016

Mater. Tehnol.

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Effects of melt stirring and holding time were studied with an Al-4.5 % of mass fractions of Cu (A206) alloy. The optimum level of a grain refiner was determined in conjunction with both continuously stirred and non-stirred melts during the holding time. Results showed that a mass fraction of a Ti addition of as low as 0.03 % was sufficient to obtain the 82 μm average grain size, while a Ti addition exceeding the mass fraction of 0.03 % showed no significant effect on the grain size of castings. The grain refinement tends to fade with a long holding time in a non-stirred liquid. The results also showed that an effective grain refinement of the A206 alloy can be achieved with a long holding time as long as the liquid alloy is continually stirred.Keywords: grain refinement, melt stirring, holding time, Al-4.5Cu alloy, A206 alloy Raziskan je bil vpliv me{anja in~asa zadr`evanja taline zlitine Al-4,5 % masnega dele`a Cu (A206). Dolo~ena je bila optimalna koli~ina udrobnjevalca zrn, v povezavi s stalnim me{anjem ali brez me{anja taline med zadr`evanjem. Rezultati so pokazali, da je bilo`e 0,03 % masnega dele`a dodatka Ti, dovolj za doseganje povpre~ne velikosti zrn 82 μm, medtem ko dodatek Ti ve~ji od 0,03 % masnega dele`a, ni pokazal vpliva na velikost zrn ulitkov. U~inkovitost drobnjenja zrn se zmanj{a pri dolgih~asih zadr`anja in brez me{anja taline. Rezultati so pokazali {e, da je mogo~e dose~i u~inkovito drobnjenje zrn tudi pri dolgih~asih zadr`evanja, dokler se talina stalno me{a. Klju~ne besede: drobnjenje zrn, me{anje taline,~as zadr`evanja, zlitina Al-4.5Cu, zlitina A206

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“…As a result, Al-Ti-B grain refiners have limited use in alloys for aerospace industries [11]. Despite considerable research done in the production and optimization of an Al-5% Ti-1% B grain refiner over the past three decades, the problems associated with TiB 2 agglomeration, large Al 3 Ti particles and impurities from KF-AlF 3 flux still exist and therefore there is a need for a novel and efficient grain refiner to be developed [3,[6][7][8][9][10]. Addition of Al5Ti1B rod to an AA1050-type alloy produces a grain size typically between 150 µm and 200 µm but the ingots are huge (1.5110 m).…”

Section: Introductionmentioning

confidence: 99%

Processing of Metal Matrix Composites under External Fields and Their Application as Grain Refiner

Djan¹,

Madam²,

Babu³

et al. 2014

Light Metals 2014

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In an attempt to develop an efficient grain refiner by application of external fields, aluminium-based metal matrix composite AlMg-Ti/TiB 2 , has been processed by mechanical stirring and treated by external field such as ultrasonication. In this study we present the microstructural features of the composite and the grain structure of Al-Mg-Ti alloy when this composite is added as a master alloy. Preliminary tests with the addition of Al-3% Mg-0.01% Ti/TiB 2 master alloys to Al-3% Mg-0.01% Ti showed indication of grain refinement and improvement in Brinell hardness.

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Mechanism of grain refinement in aluminium

Cited by 463 publications

References 20 publications

Model of Dendrite Growth in Metallic Alloys

Model of Dendrite Growth in Metallic Alloys

Investigation of the effect of holding time and melt stirring on the grain refinement of an A206 alloy

Processing of Metal Matrix Composites under External Fields and Their Application as Grain Refiner

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