Microstructure and mechanical behavior of Al9Si0.8Fe alloy with different Mn contents

Abstract

It has been reported that the detrimental effect of Fe on the mechanical properties of Al alloys can be eliminated through the addition of Mn. In this study, we examine the effects of the addition of different Mn contents (0.1, 0.2, 0.4 and 0.7 wt-% of Mn) on the microstructure and mechanical behaviour of Al9Si0.8Fe alloy. It is shown that the presence of up to 0.4 wt-% of Mn changed the platelike morphology of β-Al 5 FeSi into α-Al 15 (Fe,Mn) 3 Si 2 with a Chinese script-like morphology. Mn contents higher than 0.4 wt-% promoted the formation of α-Al 15 (Fe,Mn) 3 Si 2 phase with a polygonal morphology. The effect of the addition of up to 0.7 wt-% of Mn on the mechanical properties of Al9Si0.8Fe alloys is in fact quite negligible.

In Situ Formation of Titanium Diboride in A356/B4C + TiB2 Hybrid Composite: Evaluation of Microstructure, Mechanical Properties, and Wear Behavior

“…This is confirmed by Al-Si-Fe-Mn phase diagram in Fig. 3 [17,18]. Looking carefully at the EDS spectrum of the point number (2), Fig.…”

The Influence of La and Ce on Microstructure and Mechanical Properties of an Al-Si-Cu-Mg-Fe Alloy at High Temperature

“…The second point marked (2) in Figure 4 shows the presence of Fe and Mn and Si suggesting that this is a Fe intermetallic with some dissolved Mn. From the literature [33,34], it was reported that Ce could modify the morphology of the α-Al 15 (Fe, Mn) 3 Si 2 phase from large Chinese script-like into small and discrete blocky shape particles. No well-developed Chinese script-like particles could be found in the current study, suggesting that a similar modification occurred in the current study.…”

Understanding the effect of Ni content on microstructure and mechanical properties of A384 HPDC alloy

“…The main reasons of selecting this alloy are its castability, high strength to weight ratio, machinability, and also the possibility of improving the properties with heat treatments. Other than silicon this alloy contains Cu in order to increase strength, Fe to achieve an easy release of the cast parts from the die, and Mn to overcome the detrimental effects of Fe [2][3][4][5]. The silicon level of the A384 alloy is very close to the eutectic point in the Al-Si binary phase diagram which means that the microstructure is consisting of Al-Si eutectic phase with a small amount of α-Al dendrites and different intermetallic phases.…”