Al-Qadisiyah Journal for Engineering Sciences

Mechanical properties of functionally graded Al-Cr-Fe alloy fabricated by sequential casting with influence of vibration

Document Type : Research Paper

Authors

Abdul Raheem Kadhim Abid Ali
Haydar Al-Ethari
Ali Abbas Hasan

Department of Metallurgical Engineering, Materials Engineering College, University of Babylon, Babylon, Iraq.

10.30772/qjes.2024.151081.1280
Abstract
The performance of functionally graded materials is much better than materials with unchanged properties and compositions. Al-Cr-Fe alloys with different Cr concentrations were proposed for this work. Potential applications for these materials include automotive pistons. FGM was fabricated by a successive stage of the sequential casting method with mechanical vibration during the solidification. The FGM sample consists of two alloys with different chemical compositions (Al-8Si-2Fe) and (Al-2Cr-2Fe). Two types of samples were studied and compared, with and without mold vibration. The method of mechanical mold vibration, which in turn reduces the segregation and pores in the cast and refines the microstructure. The results of the XRD showed the presence of α-Al phase,  Al₈₀Cr₁₃.₅Fe₆.₅, Al₁₃Cr₂, and Al₁₃Fe₄ compounds that enhance the strength of the alloy.  Optical microscope images showed a difference in the microstructure at both sides of the interface between the two alloys. There is variation in the hardness values ​​due to the difference in the chemical composition of the alloys. The recorded improvement in the tensile strength was 17%, and a decrease in Compression by 1.5%.

Keywords

Aluminum alloy
Sequential casting
Vaibration moled
Finer granular
Interface
Automotive pistons
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Al-Qadisiyah Journal for Engineering Sciences
Volume 18, Issue 2
Spring 2025
Pages 126-130

  • Receive Date 24 June 2024
  • Revise Date 27 September 2024
  • Accept Date 12 April 2025

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