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Effects Of Partial Remelting On Microstructure Of Al-Si-Ti Bulk Alloy Prepared By Cold Pressing Mixed Powders

Y. Wang, T. Chen, S. Q. Zhang, Y. Qin, X. Zhang
Published 2016 · Materials Science

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The microstructural evolution and phase transformations have been investigated during the partial remelting of a bulk alloy prepared by the cold pressing of A356, pure Ti and pure Al powders. A dropping experiment was used to investigate the reaction kinetics of Ti powders and the Al matrix simultaneously. The results show that a semi-solid microstructure with ne and spheroidal primary α-Al particles suspended in the liquid phase could be obtained after the bulk alloy was heated to 595°C for 30 min. The microstructural evolution process was divided into four stages, involving the transformation of the powders into primary particles, the formation of a liquid phase and the increase in its amount, which results in the formation of a continuous liquid layer, the rapid coarsening of the primary particles and the increase in the liquid phase amount, and the nal coarsening of the primary particles. Chemical reactions between the Ti powders and the Al element in the matrix occurred simultaneously. Next, core-shell structured, reinforced particles composing both an intermetallic shell and a soft Ti metal core formed in situ. The compact shell subsequently ruptured and peeled off when its thickness increased to a given value for a given size of Ti powder particles. Finally, the Ti powders were consumed completely because of the formation and the subsequent peeling of the shell. Results of the dropping simulation experiment show that the reaction product layer grows in a linear kinetic manner characterized by an activation energy of 374 kJ/mol. [doi:10.2320/matertrans.M2016070]
This paper references
10.1016/S0927-796X(00)00024-3
Microstructural and mechanical characteristics of in situ metal matrix composites
S. C. Tjong (2000)
Dobrzañski and J.M
M. Adamiak (2004)
Effect of Si in alloy on intermetallic compounds growth behavior during reaction between solid Ti and liquid Al
J. Li (2010)
10.1016/J.JALLCOM.2011.05.032
Influence of Si and Ti contents on the microstructure, microhardness and performance of TiAlSi intermetallics in Al–Si–Ti alloys
Tong Gao (2011)
10.1007/S11661-007-9153-2
The Effect of Particle Shape on the Sintering of Aluminum
Z. Liu (2007)
10.1016/S0921-5093(01)01894-9
The effect of processing variables on the structure and chemistry of Ti-aluminide based LMCS
D. Goda (2002)
Benesovsky: Monatshefte für Chemie und verwandte Teile anderer Wissenschaften
C. Brukl (1961)
10.1007/S11669-014-0282-1
On the Liquid/Solid Phase Equilibria in the Al-Rich Corner of the Al-Si-Ti Ternary System
O. Dezellus (2014)
10.1016/j.jallcom.2008.05.068
Micro structural features and mechanical properties of Al-Al3Ti composite fabricated by in-situ powder metallurgy route
V. Abbasi Chianeh (2009)
10.1016/J.JALLCOM.2014.02.107
Experimental investigation and thermodynamic calculation of the Al–Si–Ti system in Al-rich corner
Qun Luo (2014)
10.1023/A:1017572624976
Fabrication of TiAl by blended elemental powder semisolid forming
C. Wen (2001)
10.1016/S1359-6454(00)00036-7
THE DEVELOPMENT OF SPATIAL CORRELATIONS DURING OSTWALD RIPENING: A TEST OF THEORY
V. Snyder (2000)
Engineered materials handbook
T. J. Reinhart (1987)
10.1007/s11661-012-1326-y
Formation of Small Blocky Al3Ti Particles via Direct Reaction Between Solid Ti Powders and Liquid Al
Zhiwei Liu (2012)
10.1016/J.MATCHEMPHYS.2012.09.052
Reaction pathways, activation energies and mechanical properties of hybrid composites synthesized in-situ from Al-TiO2-C powder mixtures
Heguo Zhu (2012)
10.4028/www.scientific.net/AMR.820.20
Microstructural Evolution during Partial Remelting of 6061 Aluminum Bulk Alloy Prepared by Cold-Pressing of Alloy Powder
Yu Chen (2013)
10.3390/MET5020547
Research on Semisolid Microstructural Evolution of 2024 Aluminum Alloy Prepared by Powder Thixoforming
Pubo Li (2015)
Handbook of Ternary Alloy Phase Diagrams
P. Villars (1995)
10.1016/S0921-5093(03)00070-4
Microstructure and bonding mechanism of Al/Ti bonded joint using Al–10Si–1Mg filler metal
W. H. Sohn (2003)
10.1007/BF02646001
Thermodynamic Assessment and Calculation of the Ti-Al System
U. Kattner (1992)
10.1016/S1003-6326(09)60181-3
Microstructure of in situ Al3Ti/6351Al composites fabricated with electromagnetic stirring and fluxes
Gui-rong Li (2010)
10.1007/BF00918638
Die Kristallstruckturen von TiSi, Ti(Al,Si)2 und Mo(Al,Si)2
C. Brukl (1961)
10.1023/A:1004761116824
The effect of extrusion parameters on the fretting wear resistance of Al-based composites produced via powder metallurgy
J. Zhou (1999)
10.1016/J.MSEA.2003.08.049
In situ fabrication of Al3Ti particle reinforced aluminium alloy metal–matrix composites
X. Wang (2004)
10.1016/J.JMATPROTEC.2005.06.037
The effect of mechanical alloying on SiC distribution and the properties of 6061 aluminum composite
N. Zhao (2005)
10.1016/J.JALLCOM.2010.06.106
Effect of initial as-cast microstructure of AZ91D magnesium alloy on its semisolid microstructure
T. Chen (2010)
10.1016/J.MATDES.2008.04.071
Fabrication of high wear resistant Al/Al3Ti metal matrix composite by in situ hot press method
Mohammadreza Nofar (2009)
10.1016/S1001-0521(06)60010-7
Preparation of Al-Al3Ti in situ composites by direct reaction method
H. Yu (2006)
10.1016/J.POWTEC.2013.07.005
Fabrication of in situ Al3Ti/Al composites by using ultrasound assisted direct reaction between solid Ti powders and liquid Al
Zhiwei Liu (2013)
10.1016/S0921-5093(00)00908-4
Evolution of near-equiaxed microstructure in the semisolid state
E. Tzimas (2000)
Lomello-Ta n and J.C
O. Dezellus (2014)
10.1016/J.COMPOSITESA.2007.10.018
Fracture behavior of particle reinforced metal matrix composites
A. Rabiei (2008)
10.1016/J.JALLCOM.2014.09.009
Fabrication, microstructure and mechanical properties of Al–Fe intermetallic particle reinforced Al-based composites
Yang Xue (2015)
Study on semi-solid microstructural evolution of powder mixed thixoforming formed SiCp/Al matrix composite
W. Fu (2013)
10.1016/J.JMATPROTEC.2004.04.202
Mechanically milled AA6061/(Ti3Al)P MMC reinforced with intermetallics – the structure and properties
M. Adamiak (2004)
10.1016/J.MSEA.2006.07.077
Growth of intermetallic layer in multi-laminated Ti/Al diffusion couples
L. Xu (2006)



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