The Effects of Solidification Conditions and Heat Treatment on the Microstructure and Mechanical Properties of EN-AC 44400 Alloy

Sadrossadat, S. Mohsen; Johansson, Sten

doi:10.4028/www.scientific.net/msf.649.505

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Studies on the transient solidifi cation of ternary alloys relating microstructural parameters and their correlations with mechanical properties have been developed in the literature (Atwood and Lee 2003, Costa et al 2015, Ferreira et al 2010, Sadrossadat and Johansson 2010, Swaminathan and Voller 1997, Voller 1998. The vast majority has been developed for vertical upward directional solidification (Easton et al 2010, Ferreira et al 2010, Rappaz and Boettinger 1999, Sadrossadat and Johansson 2010, Swaminathan and Voller 1997, Voller 1998.…”

Section: Introductionmentioning

confidence: 99%

“…The vast majority has been developed for vertical upward directional solidification (Easton et al 2010, Ferreira et al 2010, Rappaz and Boettinger 1999, Sadrossadat and Johansson 2010, Swaminathan and Voller 1997, Voller 1998. In the case of vertical upward directional solidifi cation, the infl uence of the convection is minimized when solute is rejected for the interdendritic regions, providing the formation of an interdendritic liquid denser than the global volume of liquid metal.…”

Section: Introductionmentioning

confidence: 99%

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Interconnection between microstructure and microhardness of directionally solidified binary Al-6wt.%Cu and multicomponent Al-6wt.%Cu-8wt.%Si alloys

Vasconcelos

Kikuchi

Barros

et al. 2016

An. Acad. Bras. Ciênc.

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An experimental study has been carried out to evaluate the microstructural and microhardness evolution on the directionally solidifi ed binary Al-Cu and multicomponent Al-Cu-Si alloys and the infl uence of Si alloying. For this purpose specimens of Al-6wt.%Cu and Al-6wt.%Cu-8wt.%Si alloys were prepared and directionally solidifi ed under transient conditions of heat extraction. A water-cooled horizontal directional solidifi cation device was applied. A comprehensive characterization is performed including experimental dendrite tip growth rates (V L ) and cooling rates (T R ) by measuring Vickers microhardness (HV), optical microscopy and scanning electron microscopy with microanalysis performed by energy dispersive spectrometry (SEM-EDS). The results show, for both studied alloys, the increasing of T R and V L reduced the primary dendrite arm spacing (λ 1 ) increasing the microhardness. Furthermore, the incorporation of Si in Al-6wt.%Cu alloy to form the Al-6wt.%Cu-8wt.%Si alloy infl uenced signifi cantly the microstructure and consequently the microhardness but did not affect the primary dendritic growth law. An analysis on the formation of the columnar to equiaxed transition (CET) is also performed and the results show that the occurrence of CET is not sharp, i.e., the CET in both cases occurs in a zone rather than in a parallel plane to the chill wall, where both columnar and equiaxed grains are be able to exist.

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