Influence of Thermomechanical Processing on the Microstructure and Tensile Behavior of Solution-Treated Al-18%Si-4.5%Cu Alloy

Damavandi, Esmaeil; Nourouzi, Salman; Jamaati, Roohollah; Rabiee, Sayed Mahmood; Szpunar, Jerzy A.

doi:10.1007/s11665-021-05778-1

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…This spherical transformation improves the interfacial diffusion between the eutectic Si– and Al–matrix, by reducing the interfacial energy and increasing the radius of curvature. [ 59–61 ] The presence of intermetallic Al 5 Cu 2 Mg 8 Si 6 was also found in the Al–matrix (marked as 4# , Figure 6d), which should be produced by eutectic reaction α‐Al (Cu) + Mg 2 Si→Al 5 Cu 2 Mg 8 Si 6 . [ 62 ]…”

Section: Resultsmentioning

confidence: 99%

Electromagnetic Preparation and Wear Behavior of In Situ Si‐Reinforced Al–Matrix Gradient Self‐Lubricating Composites

Dong,

Zou,

Kong

et al. 2023

Adv Eng Mater

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In this work, a novel Sn self‐lubricating Al matrix composites with in‐situ Si reinforced gradient structure ([Sn×Si‐rich]◎Al‐matrix composites) is proposed. [Sn×Si‐rich]◎Al‐matrix composites is successfully prepared by controlling synergistic separation of primary Si and Sn under rotating magnetic field. The results show the wear‐resistant structure of “soft Sn surrounding hard Si” persists in [Sn5×Si‐rich] layer. [Sn5×Si‐rich]◎Al‐matrix composites with 5 wt.% Sn addition is advised to balance self‐lubrication of Sn with its negative effects on hardness and tensile strength. The Vickers hardness of [Sn×Si‐rich] layer/Al‐matrix for [Sn5×Si‐rich]◎Al‐matrix composites reaches 1062 HV/120 HV, successfully achieving gradient design of mechanical properties. Meanwhile, tensile strength and average coefficient of friction (COF) value/wear rate are 263 MPa, 0.43/3.81×10‐4 mm3/(N·m), respectively. Furthermore, the average COF and wear rate of [Sn5×Si‐rich]◎Al‐matrix composites increase firstly, then decrease slightly, and finally increase, with increasing wear temperatures. And the lower COF/wear rate of 0.52/5.41×10‐4 mm3/(N·m) occurs at 300 °C as a turning point, because the soft Sn melts into liquid phase and can better spread over wear surface to form a self‐lubricating film to reduce wear. This study can accelerate the development and application of Sn self‐lubricating Al‐matrix composites in high‐temperature industrial systems for automotive lightweight and aerospace.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

Electromagnetic Preparation and Wear Behavior of In Situ Si‐Reinforced Al–Matrix Gradient Self‐Lubricating Composites

Dong,

Zou,

Kong

et al. 2023

Adv Eng Mater

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“…For enhancing Al−Si alloys' mechanical performances, an appropriate amount of alloy elements will usually be added to the alloy and a reasonable heat treatment process will be adopted. Cu is the most common alloy element added in an Al−Si alloy, Cu is added to form θ-Al 2 Cu and other phases in the alloy and then, through ageing and strengthening of these phases, alloy properties are improved [5,6].…”

Section: Introductionmentioning

confidence: 99%

Calculation Based on the Formation of Mg2Si and Its Effect on the Microstructure and Properties of Al–Si Alloys

Hao

Bian

et al. 2021

Materials

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In order to investigate the effect of Mg2Si formation on the microstructure and properties of an Al−Si alloy, the critical point of a hypereutectic Al−17Si−4Cu−Mg alloy was calculated by Pandat software. The calculation results of the equilibrium phase diagram show that the critical point for Mg2Si phase formation for the alloy was obtained when the Mg content was 2.2%. The contents of 0.5 wt.% Mg and 2.5 wt.% Mg were selected as the research object. The content of Mg increased from 0.5 wt.% to 2.5 wt.%, the eutectic Si in the matrix was reduced, and the Chinese character-like Mg2Si phase appeared in the microstructure. In the peak ageing state, in addition to θ″ and Q′ phases that were mainly precipitated, there was also needle-like β″ precipitation in the 2.5 wt.% Mg content alloy. Larger precipitates were found in 2.5 wt.% content alloys, mainly due to the promotion of the solid solution having the aggregation and segregation of more solute elements in the matrix. The tensile strength, elongation, and hardness of hypereutectic Al−17Si−4Cu−0.5Mg alloy under peak ageing were 331 MPa, 3.11%, and 152.1 HB, respectively. The tensile strength and the elongation decreased while the hardness increased with the 2.5 wt.% Mg content, which is due to the formation of hard and brittle Mg2Si and Al8FeMg3Si, which has a splitting effect on the matrix.

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Effects of Prior Solution Treatment on the Superior Strengthening of Texture Component of ECAPed Al–18Si–4.2Cu alloy

Damavandi

2024

Metall Mater Trans A

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Influence of Thermomechanical Processing on the Microstructure and Tensile Behavior of Solution-Treated Al-18%Si-4.5%Cu Alloy

Cited by 5 publications

References 56 publications

Electromagnetic Preparation and Wear Behavior of In Situ Si‐Reinforced Al–Matrix Gradient Self‐Lubricating Composites

Electromagnetic Preparation and Wear Behavior of In Situ Si‐Reinforced Al–Matrix Gradient Self‐Lubricating Composites

Calculation Based on the Formation of Mg2Si and Its Effect on the Microstructure and Properties of Al–Si Alloys

Effects of Prior Solution Treatment on the Superior Strengthening of Texture Component of ECAPed Al–18Si–4.2Cu alloy

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