Effects of Zr Additive on Microstructure, Mechanical Properties, and Fractography of Al-Si Alloy

Qian, Hui; Zhu, Donghui; Hu, Chunfeng; Jiang, Xiaosong

doi:10.3390/met8020124

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…According to Adeyemi et al [1] and Qian et al [22], these hard precipitates and second phase particles compared to the other samples provided desirable impediment to dislocation motion within the matrices. Thus, their tensile strength was enhanced from 118.7 MPa to 171.6 MPa at 6 wt.% IMS particle addition.…”

Section: Tensile Strengthmentioning

confidence: 99%

Mechanical and Thermal Characterisation of Millscale Modified Al-Cu Alloy for Artificial Intelligence Systems

Sekunowo

Kuforiji

Ajibodu

2021

J. Inst. Engineering

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Continuous research into critical functional property enhancement of materials employed in artificial intelligence systems is imperative to overcome performance limitations. This study investigated the thermal and mechanical properties of stir-cast fabricated Al-Cu alloy modified with addition of iron-millscale (IMS) particles varied from 2-6 wt.%. The alloys microstructure was analysed using both optical and scanning electron microscope coupled with energy dispersive spectroscopy (SEM/EDS). PerkinElmer Thermogravimetry/Derivative thermal analyser was used to assess the alloys thermal characteristics while the mechanical properties were evaluated using relevant state of the art equipment. Results show that the best thermal and mechanical properties comparable to established standards were achieved at 6 wt.% IMS particle addition. Contributions to the alloy enhanced performances stemmed from the structure refining propensity of IMS particles. Based on the thermal and mechanical properties demonstrated, the alloy is recommended for application in pneumatic offshore valve actuator used in oil and gas flow process lines.

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Section: Tensile Strengthmentioning

confidence: 99%

Mechanical and Thermal Characterisation of Millscale Modified Al-Cu Alloy for Artificial Intelligence Systems

Sekunowo

Kuforiji

Ajibodu

2021

J. Inst. Engineering

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“…Addition of Mg increases the amount of reinforcing phase Al3Mg2 which is brittle [49]. When Zr is added into the alloy, a typical plastic deformation and a large amount of pits are formed into the Al-Mg alloys due to presence of fine precipitates of Al3Zr as well as grain refining effect [50,51].…”

Section: Sem and Edx Observationmentioning

confidence: 99%

Role of magnesium and minor zirconium on the wear behavior of 5xxx series aluminum alloys under different environments

Kaiser

Matin

Shorowordi

2020

Journal of Mechanical and Energy Engineering

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The tribological performance of 5xxx series aluminum alloys with ternary zirconium is evaluated at ambient conditions under dry, wet and saline environment. The experiment has been done using a Pin-on-Disk apparatus under an applied load of 20N. The sliding distances varies ranging from 116m-2772m at a sliding velocity of 0.385 ms-1. The results show that presence of Mg and Zr into this alloy helps to increase their strength and wear resistance under dry sliding condition. But they significantly suffer under wet and corrosive environment due to formation of β-phase Al3Mg2, to slip bands and grain boundaries which may lead to and stress-corrosion cracking. The variation of friction coefficient is observed in wet and corrosive environment due to the formation of oxidation film, lubrication, and corrosion action in solution. The SEM fracture surface shows that brittle Al3Mg2 phase initiate the brittle fracture surface for Al-Mg alloy and Zr addition accelerate the brittleness of the alloy owing the fine precipitates of Al3Zr.

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“…Grain size refinement was promoted by the reaction between Al and Zr, forming Al 3 Zr and ZrSi 2 compounds. Compared to a Zr-free alloy, the additive enhanced the tensile strength, compressive strength, shear strength, and hardness [ 20 ]. On the other hand, Lu, in his work, describes how the addition of Zr significantly refined the microstructure of Al-Si-Cu-Mg baseline alloy, with the a-Al grain size decreasing from 335 to 253 µm and the SDAS decreasing from 39 to 28 µm.…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Zirconium, Titanium and Strontium on the Properties and Microstructure of AlSi7Mg0.3Cu0.5 Alloy

et al. 2022

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The aim of the paper is to describe and specify the properties and microstructure of Al-Si alloy using Zr, a combination of Zr with elements used in the grafting of Al (Ti) alloys, and modification (Sr). Al-Si alloys with a combination of Zr and Ti and Sr elements represent an opportunity for the development of new aluminum alloys with a specific use. The experiment focused on the analysis of the synergistic effects of Zr with Ti and Zr with Sr on a AlSi7Mg0.3Cu0.5 alloy. The experimental alloys contained a constant Zr content of 0.15 wt. % and were alloyed with a gradual addition of Ti and Sr in the range of 0.1 to 0.3 wt. % for Ti, and 0.1 to 0.3 wt. % for Sr. The experimental samples were cast by meltable model casting technology. In variants with a constant addition of Zr 0.15 wt. % and a gradual addition of Ti, we observed an increase in the values of mechanical characteristics, with a significant decrease in ductility. When evaluating the structure of experimental alloys, Ti affected it by increasing the number of precipitated Zr phases. Experimental alloys with Zr and Sr addition were characterized by nucleation of Zr phases in angular morphology. It can be concluded that the investigated elements are expected to have a positive (strengthening) effect even at higher operating temperatures.

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Effects of Zr Additive on Microstructure, Mechanical Properties, and Fractography of Al-Si Alloy

Cited by 20 publications

References 24 publications

Mechanical and Thermal Characterisation of Millscale Modified Al-Cu Alloy for Artificial Intelligence Systems

Mechanical and Thermal Characterisation of Millscale Modified Al-Cu Alloy for Artificial Intelligence Systems

Role of magnesium and minor zirconium on the wear behavior of 5xxx series aluminum alloys under different environments

Study of the Influence of Zirconium, Titanium and Strontium on the Properties and Microstructure of AlSi7Mg0.3Cu0.5 Alloy

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