Effect of Mn and heat treatment on improvements in static strength and low-cycle fatigue life of an Al–Si–Cu–Mg alloy

Shaha, S.K.; Czerwiński, F.; Kasprzak, W.; Friedman, J.; Chen, D.L.

doi:10.1016/j.msea.2016.01.015

Cited by 59 publications

(26 citation statements)

References 57 publications

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“…4 A trace of the transition alloying element(s) such as Mn, Mo, Ni, Cr, V, Zr, and Ti are often added to Al-Si-Cu-Mg alloys to maintain/improve the fatigue and mechanical properties at high temperatures, because these elements: (1) can form thermally stable strengthening phases such as Al3Zr; (2) have low solid solubility and exhibit low diffusivity in the Al matrix; (3) can retain the ability for the alloy to be conventionally solidified. Shaha et al [11,12,13] have extensively studied the effect of Mn, Mo, Ti, V, and Zr on the mechanical properties of Al-Si-Cu-Mg. It was found that the addition of Mn and/or Mo significantly improved the tensile and low cycle fatigue (LCF) properties of Al-7Si-1Cu-0.5Mg under T6 peak aging condition, leading to the 7% higher of UTS and 16% higher of elongation due to the formation of Mnand Mo-rich dispersoid precipitates [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…Shaha et al [11,12,13] have extensively studied the effect of Mn, Mo, Ti, V, and Zr on the mechanical properties of Al-Si-Cu-Mg. It was found that the addition of Mn and/or Mo significantly improved the tensile and low cycle fatigue (LCF) properties of Al-7Si-1Cu-0.5Mg under T6 peak aging condition, leading to the 7% higher of UTS and 16% higher of elongation due to the formation of Mnand Mo-rich dispersoid precipitates [11,12]. Elhadari et al [9] proposed that Ti, Zr, and V enhanced the tensile and low cycle fatigue properties of Al-7Si-1Cu-0.5Mg, with 60-87% increment in the yield strength.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Liu

Blake

2019

Journal of Alloys and Compounds

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The Zr-modified Al-Si-Cu-Mg alloy with 0.14wt%Zr addition was studied against the counterparts of commercially used EN-AC-42000 (Al7Si0.5Cu) baseline alloy for the effect of Zr on the high cycle fatigue (HCF) and mechanical properties at elevated temperatures of 150, 200, 250 o C. It was found that the fatigue life was significantly improved by 8-10 times at the high stress amplitude of 140 MPa in the Zr-modified alloy at all different temperatures. The

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Liu

Blake

2019

Journal of Alloys and Compounds

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“…The experimental alloys were prepared from commercially pure Al (99.7%), electrolytic grade copper, commercially pure Mg, an Al-30Si master alloy and an Al-10Mn master alloy. These raw materials were melted in an electrical resistance crucible furnace and cast into ingots with a water-cooled copper mold (180 × 100 × 30 mm 3 ). The compositions of the alloy ingots used in the present study are shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, Al-Si alloys have been widely used in engines within the automotive and aerospace industries because of their high specific strength, high wear resistance, high corrosion resistance, low thermal expansion coefficient, low cost and excellent casting performance, making these alloys incomparable to other aluminum alloys [1][2][3][4]. Combinations of Al, Si and other elements is an effective and easy way to modify material performance and expand the use of an alloy.…”

Section: Introductionmentioning

confidence: 99%

Phase Formation and Microstructure Evolution of Al-5Si-0.8Mg Alloys with Different Mn Concentrations

Tian

Wang

Zhou

et al. 2021

Metals

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Mg-containing high-Si aluminum alloys are heat-treatable alloys that are widely used in industry. Substantial attention has been paid to increasing the performance of such alloys by adding a small amount of Mn, which is an effective and common alloying element in aluminum alloys. In the present work, the solidification process of Mn-free Al-5Si-0.8Mg alloy and Al-5Si-0.8Mg-(0.45–1.97)Mn alloys are analyzed by the experimental results combined with thermodynamic calculation. The results showed that α-Al, Si, Mg2Si and π (Al8Mg3FeSi6) are predominant phases in the Mn-free Al-5Si-0.8Mg alloy while the π (Al8Mg3FeSi6) phase are transformed to α-Al(FeMn)Si phase with the addition of 0.45% Mn. With increasing Mn addition to 0.72%, the L→α-Al was replaced by L→α-Al(FeMn)Si and a primary α-Al(FeMn)Si phase appeared. Further increasing the Mn to 1.97%, the solidification reactions remained unchanged. However, the size and number of the primary α-Al(FeMn)Si phase gradually increased, while the divorced eutectic phenomenon of quaternary eutectic structure gradually weakened. Meanwhile, the Mg2Si phase in the quaternary eutectic structure gradually transformed from blocky to fine eutectic lamellar, and the quaternary eutectic structure was significantly refined. Primary blocky α-Al(FeMn)Si began to form when the Mn content was higher than 0.75%.

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“…Fatigue is one of the main failure forms of engineering components of aluminum alloys [7,8]. The structural components of Al-Si series alloys work under extremely severe and complex conditions such as high stress [9,10], and the material will be in a state of plastic strain, resulting in low-cycle fatigue failure of the material [11,12]. In order to ensure the safety of components in service, it is necessary to perform a deep investigation of the fatigue characteristics of materials.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Low-Cycle Fatigue Behavior of Al-9Si-4Cu-0.4Mg-0.3Sc Alloy with Different Casting States

et al. 2020

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The low-cycle fatigue behavior of Al-9Si-4Cu-0.4Mg-0.3Sc alloy with different casting states was investigated by performing low-cycle fatigue tests and by means of observations and analysis with a scanning electron microscope (SEM) and a transmission electron microscope (TEM). It was found that the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys exhibited the cyclic stress response of strain hardening under all imposed total strain amplitudes. The cyclic deformation resistance and fatigue life of the metal-mold cast Al-9Si-4Cu-0.4Mg-0.3Sc alloy were lower than those of the die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloy. The plastic strain and elastic strain amplitudes of the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys were linearly related to the number of reversals to failure, which obeyed the Coffin-Manson and Basquin formulas, respectively. The results of TEM observation revealed that at all imposed total strain amplitudes, the cyclic deformation mechanisms of the metal-mold cast and die-cast Al-9Si-4Cu-0.4Mg-0.3Sc alloys were planar slip and wavy slip at the lower and higher strain amplitudes, respectively.

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Effect of Mn and heat treatment on improvements in static strength and low-cycle fatigue life of an Al–Si–Cu–Mg alloy

Cited by 59 publications

References 57 publications

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Effect of Zr on the high cycle fatigue and mechanical properties of Al–Si–Cu–Mg alloys at elevated temperatures

Phase Formation and Microstructure Evolution of Al-5Si-0.8Mg Alloys with Different Mn Concentrations

Microstructure and Low-Cycle Fatigue Behavior of Al-9Si-4Cu-0.4Mg-0.3Sc Alloy with Different Casting States

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