Effect of Mn Addition on the Mechanical Properties of Al–12.6Si Alloy: Role of Al15(MnFe)3Si2 Intermetallic and Microstructure Modification

Biswas, Prosanta; Patra, Surajit; Roy, Himadri; Tiwary, Chandra Sekhar; Paliwal, Manas; Mondal, Manas Kumar

doi:10.1007/s12540-019-00535-5

Cited by 23 publications

(4 citation statements)

References 43 publications

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“…Accordingly, Quality Index ( Q. I. ) is calculated which considers both ductility and UTS in the following relationship [10]: As the UTS and % elongation increase with Zr concentration, the Q.I. will also increase continuously (Figure 20).…”

Section: Resultsmentioning

confidence: 99%

“…In conclusion, modifying eutectic Si, Fe-based intermetallics, and α-Al grains is critical for the hypoeutectic Al-Si alloys. Several modifiers and refiners have been utilised to modify the Al-Si alloys in recent times, including Bi [3], Al-P master alloy [4], Ag [18], Yb and Gd [34], Eu [37], Ca [41], Al-Ti-Nb-B master alloy [42], Si-Mg-15La master alloy [43], Al-V-B master alloy [44], Mn [10], and Al-Ti-B master alloy [45]. Previous researchers have explored two main modification mechanisms, namely, restricted growth theory and nucleation theory.…”

Section: Introductionmentioning

confidence: 99%

“…Among these materials, the Al-Si alloys are the most popular for shaped castings, accounting for 90% of all such materials [4,5]. These alloys have many advantages, such as high specific strength, low thermal expansion coefficient, resistance to wear and seizure, low density, good stiffness, excellent corrosion resistance, damping capacity, good formability, heat durability, electrical conductivity, and low manufacturing cost [6][7][8][9][10][11][12][13]. Owing to the Si eutectic and low solidification shrinkage, the Al-Si alloys offer exceptional casting qualities, including excellent castability and high fluidity [14].…”

Section: Introductionmentioning

confidence: 99%

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Thermochemical modelling and mechanical property of the Al-7.6Si-xZr alloy

Biswas

Das

et al. 2023

Materials Science and Technology

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This study utilised the gravity casting method to modify hypoeutectic Al-7.6Si alloys with Zr at varying weight percentages (0.1%, 0.2%, and 0.3%). The unmodified alloy typically consists of a needle or platelike eutectic silicon within the dendritic α-Al phase. The addition of Zr increases the liquidus temperature of the alloy and results in the formation of ZrSi and ZrSi2 compounds, which act as nucleation sites for both the eutectic Si and α-Al grains. As a result, the needle or platelike eutectic silicon transforms into a fibrous structure with a more uniform distribution, and the α-Al phase becomes finer and globular. These microstructural changes lead to improved bulk hardness, ductility, and mechanical properties of the alloy.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermochemical modelling and mechanical property of the Al-7.6Si-xZr alloy

Biswas

Das

et al. 2023

Materials Science and Technology

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“…The needle-like Fe-rich phases formed can cleave the alloy matrix, thereby reducing the mechanical performance of the alloy. The addition of Mn elements can improve the morphology of the needle-like Fe-rich phases and mitigate their impact on the mechanical properties of the alloy [23][24][25][26]. Therefore, this study also considers adding an appropriate amount of Mn element to improve the morphology of the Fe-rich phase.…”

Section: Introductionmentioning

confidence: 99%

Effects of Low Nickel Content on Microstructure and High-Temperature Mechanical Properties of Al-7Si-1.5Cu-0.4Mg Aluminum Alloy

Chen,

Wu,

et al. 2024

Metals

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In this paper, the effects of Ni content on the room and elevated temperature (250 °C) tensile strength of Al-7Si-1.5Cu-0.4Mg-0.3Mn-0.1RE-xNi (x = 0, 0.3, 0.6, 0.9 wt.%) alloys were investigated, along with microstructure characterization and tensile testing. In the as-cast state, the dominant Ni-rich phases were primarily the γ-Al7Cu4Ni and δ-Al3CuNi phases. Following the solution heat treatment, a significant reduction in the γ-Al7Cu4Ni phase was noted, accompanied by the emergence of numerous small ε-Al3Ni phases. Both room temperature strength and high temperature strength at 250 °C exhibited a consistent increase with rising Ni content, reaching 405 MPa and 261 MPa, respectively, at 0.9 Ni content, which were increased by 6.4% and 16.8%, respectively, compared with 0 Ni content. The elongation exhibited an oscillating increase within the Ni content range of 0 to 0.6, reaching peak values of 2.6% in room temperature and 4.3% in high temperature at 0.6 Ni, followed by a rapid decline. At 0.6 Ni content, the alloy demonstrated a well-balanced combination of mechanical properties, featuring commendable strength and plasticity.

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