Hardness and Microstructure Analysis of Original and Non-Original Yamaha Mio Engine Cylinder Blocks

Authors

  • Muhammad Akbar Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia Author
  • Muhammad Balfas Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia Author
  • Akhiruddin Pasdah Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muslim Indonesia Author

Keywords:

Blok Silinder, Kekerasan, Struktur Mikro, Pengujian

Abstract

Testing is a process to ensure that something works properly and to identify potential defects, especially in automotive component materials. Therefore, this study aims to investigate the changes in microstructure and hardness of the Mio J engine cylinder block, using both Original and Non-Original cylinder blocks as the research materials. The tests conducted include microstructure analysis, hardness testing, and SEM examination.

Based on the data analysis, the hardness test results show hardness values of 107 N/mm² at the upper part, 113 N/mm² at the inner part, 102 N/mm² at the right side, and 89 N/mm² at the left side. In the microstructure test, ferrite and pearlite phases were observed. The Original cylinder block contained 92.3% pearlite phase and 7.7% ferrite phase. Meanwhile, SEM testing revealed that both the Original and Non-Original cylinder block specimens contained Al (aluminum), Si (silicon), Fe (iron), B (boron), and O (oxygen).

From the hardness, microstructure, and SEM test results, it can be concluded that the most dominant hardness value in the Original cylinder block was found at the inner part with 121 N/mm², while in the Non-Original block it was found at the upper part with 147 N/mm². The microstructure test showed that the Original cylinder block displayed reddish (β) phases compared to whitish-grey (α) phases. Similarly, the Non-Original block also showed reddish (β) phases compared to whitish-grey (α) phases.

The SEM results for the Original cylinder block indicated that the Al K element had a value of 1.486 keV, with 24.82 mass% and 35.89 mol%, K = 1.0000. Si K showed a value of 1.739 keV, with 12.34 mass% and 34.28 mol%, K = 3.9430. The total was 100.00 mass%, 100.00 mol%, with a cation value of 15.05. For the Non-Original cylinder block, O K had a value of 0 keV with 44.96 mass%, 0 mol%, K = 0, while Fe K showed 6.398 keV, with 38.02 mass%, 48.14 mol%, K = 1.0000. The total composition was 100.00 mass%, 100.00 mol%, with a cation value of 17.73.

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Published

2023-08-31

Issue

Vol. 5 No. 2 (2023): J-Move: Journal of Mechanical Engineering

Section

Articles

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