Microstructures and Mechanical Properties of Al-Zn-Sn Bearing Alloys for High Performance Applications - World Journal of Engineering and Technology

WJET > Vol.9 No.3, August 2021

World Journal of Engineering and Technology

Volume 9, Issue 3 (August 2021)

ISSN Print: 2331-4222 ISSN Online: 2331-4249

Google-based Impact Factor: 0.80 Citations

Microstructures and Mechanical Properties of Al-Zn-Sn Bearing Alloys for High Performance Applications ()

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Download as PDF (Size: 2791KB) PP. 637-652

DOI: 10.4236/wjet.2021.93045 213 Downloads 1,286 Views Citations

Author(s)

Nermin Ali Abdelhakim^*, Rizk Mostafa Shalaby

Affiliation(s)

Metal Physics Laboratory Researsh, Department of Physics, Faculty of Science, Mansoura University, Mansoura, Egypt.

ABSTRACT

The mechanical behavior and indentation creep of Al-20 wt% Zn bearing alloy has been modified with adding 0.2 wt%, 0.5 wt%, 1 wt%, 1.5 wt% Sn. These bearing alloys were prepared by melt spinning technique. The scanning electron microscopy (SEM) was used to study the morphology of the melt spun alloys and x-ray diffractometer (XRD) for the identification of the phases pre- sent in these melt-spun bearing alloys. The results show that the structure of Al_80-x-Zn₂₀-Sn_X (X = 0.2%, 0.5%, 1% and 1.5%) bearing alloys is characterized by the presence of α-Al of FCC structure and SnZnintermetallic compound of anorthic structure. The Al-20Zn-1.5Sn has a smaller crystallite size and grain size as indicated from X-ray and SEM analysis respectively, which leading to the enhancement of the mechanical properties. The mechanical properties and indentation creep of these bearing alloys were studied by tensile test machine and vickers indentation testing at room temperature, respectively. The Al-20Zn-1.5Sn has higher hardness value and creep resistance than other alloys. This was attributed to the strengthen effect of Sn as a strong solid solution element in Al-matrix. The stress exponent values in the range 2.4 - 4.2 indicate that the grain boundary sliding is the possible mechanism during room temperature creep deformation of melt-spun Al-Zn-Sn bearing alloys.

KEYWORDS

Bearing Alloys, Microstructure, Mechanical Properties, Microhardness, Indentation Creep

Share and Cite:

Abdelhakim, N. and Shalaby, R. (2021) Microstructures and Mechanical Properties of Al-Zn-Sn Bearing Alloys for High Performance Applications. World Journal of Engineering and Technology, 9, 637-652. doi: 10.4236/wjet.2021.93045.

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