Effect of Si on Phase Equilibria, Mechanical Properties and Tribological Behaviour of Al-Cu Alloy

Abstract In the current work, novel Al-rich $ Al_{90-X} $$ Cu_{10} $$ Si_{x} $ (x = 2.5 at%, 5 at%, 7.5 at%) ternary alloys were used to evaluate the effect of Si on Al-Cu alloy in an effort to design and develop new lightweight metal alloys with unique microstructure as well as superior mechanical and good wear resistance properties. The solidification behaviour of the studied alloy was predicted by thermodynamic simulation using the ThermoCalc software and compared with experimental results. The microstructure of the studied Al-rich ternary alloys reveals the presence of dendritic phases (i.e., L → L + α-Al) followed by peritectic reaction (i.e., L + α-Al → $ Al_{2} $Cu) or eutectic reaction (i.e., L → α-Al + θ-$ Al_{2} $Cu) and finally the evolution of ternary eutectic reaction (i.e., L → α-Al + θ-$ Al_{2} $Cu + β-Si) for the investigated Al-Cu-Si alloys. It is found that the hardness increased from 150 ± 6.64 HV to 221.9 ± 6.81 HV with the addition of Si from 2.5% to 7.5%. The least wear scar depth of 48 μm is obtained for $ Al_{87.5} $$ Cu_{10} $$ Si_{7.5} $ alloy, signifying better wear resistance properties as compared to other alloys. The wear property is found to be 14.2 KN-m/$ mm^{3} $ for $ AlCuSi_{7.5} $ alloy, which is better as compared to the wear properties of $ AlCuSi_{2.5} $ alloy (i.e., 6.9 KN-m/$ mm^{3} $) at a particular load of 5 N. It is also observed that the wear resistance and microhardness properties increase with the addition of Si % with the slight reduction of tensile strength from 240 MPa to 215 MPa..

Medienart:

E-Artikel

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:15

Enthalten in:

Silicon - 15(2022), 4 vom: 29. Sept., Seite 1807-1820

Sprache:

Englisch

Beteiligte Personen:

Jain, Sandeep [VerfasserIn]
Patel, Mahesh [VerfasserIn]
Kumar, Vinod [VerfasserIn]
Samal, Sumanta [VerfasserIn]

Links:

Volltext [lizenzpflichtig]

Themen:

Fretting wear
Mechanical properties
Multicomponent alloys
Solidification behaviour
ThermoCalc simulation

Anmerkungen:

© The Author(s), under exclusive licence to Springer Nature B.V. 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

doi:

10.1007/s12633-022-02131-6

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

OLC2134354658

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