Characterization of semi-solid processing of aluminium alloy 7075 with Sc and Zr additions

Rogal, Łukasz; Dutkiewicz, J.; Atkinson, Helen V.; Lityńska‐Dobrzyńska, Lidia; Czeppe, T.; Modigell, Michael

doi:10.1016/j.msea.2013.04.078

Cited by 69 publications

(29 citation statements)

References 41 publications

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“…Previous research studies have shown that semi-solid processing of composites not only decreases porosity, but also greatly helps in uniform dispersion of particles in the alloy matrix. [14][15][16]. Sidhalingeswara and Herbert et al studied clustering behaviour of particles in Al-4.5Cu-5TiB 2 semi-solid rolled composites and observed that after a critical number of passes , the particles tend to recluster and eventually resulted in formation of agglomerates in MMCs [17,18].…”

Section: Introductionmentioning

confidence: 99%

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

Mathew

Mandal

Warnett

et al. 2016

Materials Characterization

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. (2016) X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites. Materials Characterization. Permanent WRAP URL:http://wrap.warwick.ac.uk/79069 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT1 X-ray tomography studies on porosity and particle size distribution in cast insitu Al-Cu-TiB 2 semi-solid forged composites forging reduction resulted in greater uniformity in distribution of TiB 2 particles within the composite compared to as-cast and the 50% forge reduction in semi-solid state. These results show that the application of forging in semi-solid state enhances particle distribution and reduces porosity formation in cast in-situ Al-Cu-TiB 2 metal matrix composites.

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Section: Introductionmentioning

confidence: 99%

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

Mathew

Mandal

Warnett

et al. 2016

Materials Characterization

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“…Wynikało to z obecności w α(Al) faz η' i metastabilnych dyspersoidów Al3(Sc,Zr), które umocniły stop 7075ScZr, jak również drobnego ziarna. Obróbka cieplna T62 nieznacznie tylko podwyższyła właściwości mechaniczne, które wnosiły Rm -498 MPa przy A5 -4% [11].…”

Section: Odlewnicze Stopy Aluminium Oraz Do Obróbki Plastycznej Ksztaunclassified

“…Rys.4 Wykres słupkowy przedstawiający właściwości wytrzymało-ściowe i plastyczne tikso-odlewów ze stopu 7075ScZr bezpośrednio po kształtowaniu tiksotropowym oraz obróbkach T61 i T62 [11].…”

Section: Odlewnicze Stopy Aluminium Oraz Do Obróbki Plastycznej Ksztaunclassified

Thixoforming – innovative technology production of advanced construction materials

Rogal

2015

Mechanik

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W pracy omówiono technologię formowania stopów metali z zakresu stało-ciekłego. Przedstawiono kryteria termofizyczne jakimi powinien charakteryzować się stop przeznaczony do procesu oraz metody przygotowywania struktury globularnej w fazie ciekłej oraz stałej. Na przykładzie stopu aluminium z serii Al7075 oraz wysokowęglowej stali martenzytycznej określono wpływ zastosowania modyfikatorów na właściwości mechaniczne, mikrostrukturę oraz zakres temperatur pomiędzy solidusem a likwidusem. SŁOWA KLUCZOWE: odlewanie tikstropowe, stal, modyfikacja, borThe paper describes Semi-Solid Metal Processing (SSM) of aluminum alloy and steel. The thermo-physical properties of alloys at semi-solid temperature range and methods globular microstructure preparation were discussed. Influence of modifier on mechanical properties, microstructure and solidus-liquidus range in Al7075 aluminum alloy and H18 martensitic steel was studied. KEYWORDS: thixoforming, steel, modification, boron, Zasady doboru stopów do procesuW procesach kształtowania tiksotropowego stopów metali wykorzystuje się równoczesną obecność fazy ciekłej i stałej w odpowiedniej proporcji (od 20 do 80% fazy ciekłej) [1]. Obszar występowania tych dwóch faz w stopach dotyczy przedziału temperatur pomiędzy likwidusem a solidusem, zgodnie z dwuskładnikowym układem równowagi, który został przedstawiony na rysunku 1a [2,3]. Odpowiedni zakres dwufazowy w stopach metali (obszar zaznaczony na zielono na rys. 1a) można osiągnąć przez krystalizację z fazy ciekłej lub nagrzewanie z fazy stałej [4].

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“…Previous work showed that SSM processing was appropriate for 7075 Al alloy, including rheocasting 12,13) and thixocasting [14][15][16][17] . But the authors found the liquid fraction of the alloy was sensitive with increasing temperature, and not easy to stir the molten 7075 aluminum alloy because the dendrite grains of this alloy are fairly developed during the solidi cation process.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Viscosity of Particles Reinforced 7075 Al Matrix Composites

et al. 2016

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In-situ TiB 2 particle reinforced 7075 Al alloy was produced by molten salt method (LSM). The effects of TiB 2 content on the microstructure, the melting behavior and the viscosity of 7075 Al alloy were investigated. The experimental results have shown that the microstructure became uniform rosette grains and the grain size decreased with increasing TiB 2 particles. The morphology of grains became bigger with dendritic structure when the TiB 2 particles content is more than 4.5% . The liquidus and solidus temperatures of the TiB 2 /7075 composites were rstly increased and then decreased with the increase of the content of TiB 2 particles. The semisolid processing temperature window of 7075 Al alloy became narrow after adding TiB 2 particles, and the liquid fraction of TiB 2 /7075 composites with increasing temperature was more sensitive than 7075 Al alloy. The apparent viscosity of the 4.5%TiB 2 /7075 composite was the lowest among 3.0, 4.5 and 9.0%TiB 2 /7075 aluminum matrix composites respectively. The apparent viscosity of the 9.0%TiB 2 /7075 was less than that of 7075 alloy but was greater than that of 4.5%TiB 2 /7075 composite under the same conditions. The viscosities of the composites decreased sharply with increasing shear rate, and the change with the shear rate were more sensitive than that of the 7075 alloy.

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Characterization of semi-solid processing of aluminium alloy 7075 with Sc and Zr additions

Cited by 69 publications

References 41 publications

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

X-ray tomography studies on porosity and particle size distribution in cast in-situ Al-Cu-TiB2 semi-solid forged composites

Thixoforming – innovative technology production of advanced construction materials

Microstructure and Viscosity of Particles Reinforced 7075 Al Matrix Composites

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