2010
DOI: 10.1007/s11661-009-0133-6
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Effects of Mg Content on Microstructure and Mechanical Properties of Al-14.5Si-4.5Cu Alloy

Abstract: This study elucidates how Mg content affects the microstructure and mechanical properties of Al-14.5Si-4.5Cu alloy by adding 0.45 and 0.90 wt pct Mg. Primary silicon, eutectic silicon, acicular b-Al 5 FeSi, Al 2 Cu, and Al 5 Cu 2 Mg 8 Si 6 phases were observed under the as-cast condition in low-Mg alloy. In high-Mg alloy, a large proportion of the acicular b-Al 5 FeSi phase was converted to Chinese script Al 8 Mg 3 FeSi 6 phase. Neither the acicular b-Al 5 FeSi phase nor the Chinese script Al 8 Mg 3 FeSi 6 pha… Show more

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Cited by 14 publications
(10 citation statements)
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“…From Figure 3d and the XRD analysis, it was presumed that the modification of the (β-Al 5 FeSi) phase did not occur even after the T6 heat treatment. Thus, the T6 heat treatment showed a negligible effect on the β-Al 5 FeSi phase, which was also observed by Costa et al [2] and Wu et al [23]. Oxygen discrete peaks were not observed, since the oxygen content was in a very narrow range, undetectable by X-ray analysis.…”
Section: Resultssupporting
confidence: 76%
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“…From Figure 3d and the XRD analysis, it was presumed that the modification of the (β-Al 5 FeSi) phase did not occur even after the T6 heat treatment. Thus, the T6 heat treatment showed a negligible effect on the β-Al 5 FeSi phase, which was also observed by Costa et al [2] and Wu et al [23]. Oxygen discrete peaks were not observed, since the oxygen content was in a very narrow range, undetectable by X-ray analysis.…”
Section: Resultssupporting
confidence: 76%
“…The recorded tensile strength values were 366, 388, and 420 MPa for alloy A, B, C, respectively, and the elongation rates were 10, 9.7, and 9.4 %. The obtained tensile strength of 420 MPa was greater than those previously reported by Wu et al [23] and Ke et al [8].…”
Section: Resultscontrasting
confidence: 68%
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“…3b, regions marked by A, arrow and B respectively). A detailed discussion about the Chinese script Fe-rich phase is available elsewhere [93,94]. The matrix structure of the composites remained practically unchanged due to TiC addition (Fig.…”
Section: Microscopymentioning
confidence: 99%
“…The heat of U and q 0 precipitation of alloy AT8 still increases from 5.1 J/g to 6.3 J/ g. The next section on the electrical conductivity will interpret the result of the DSC in greater detail. The dissolution and precipitation of solute atoms influences the lattice structure of the alloy in the form of point defects that scatter the conduction electrons, resulting in variations in electrical conductivity [16,19]. Table 4 lists the electrical conductivities of four alloys under the hot rolling (C H ), as-quenched (after solution treatment and cold working, C 0 ), 24 h natural aging (C 01 ) and artificial aging (C AA ) conditions.…”
Section: Microstructurementioning
confidence: 99%