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All Journal Jurnal Teknik Mesin Indonesia Infotekmesin Journal of Mechanical Design and Testing (JMDT) Jurnal Informatika: Jurnal Pengembangan IT Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)
Budi Basuki, Budi
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Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)

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Analisis Kegagalan Material Patahnya Coil Spring pada Track Adjuster Excavator PC 78 Leo Adi Saputra; Santoso, Nugroho; Setyana, Lilik Dwi; Basuki, Budi
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.15707

Abstract

One of the critical components of an excavator's undercarriage is the coil spring, which frequently breaks due to extreme working conditions, lack of routine maintenance, and material defects. This coil spring failure often occurs in the PC 78 excavator unit. The resolution of this issue requires an undetermined period of time. This problem can lead to decreased and suboptimal excavator productivity. The objective of this study is to identify the causes of coil spring fractures, evaluate its mechanical strength, and determine the type of material used. The methods applied include chemical composition analysis, microstructure examination, hardness testing, and impact testing. Visual observations indicate that the coil spring failure is caused by material fatigue, crack initiation, propagation, and final fracture characterized by beach marks and striations. Chemical composition analysis reveals the dominance of iron (Fe), carbon (C), chromium (Cr), and manganese (Mn), classifying the material as AISI 51xx steel. Microstructural examination shows a dominance of bainite, which contributes to the material's hardness. Vickers hardness testing indicates high hardness values consistent with the observed microstructure. Impact testing results suggest that the fractured specimen exhibits ductile behavior.
Co-Authors Al Ihsan, Rozaan Faros Dwi Setyana, Lilik Handoko Handoko Handoko, Handoko Hari Priambodo, Bambang Ignatius Aris Hendaryanto Isyroudin, M. Habib Kurniawan, Wingky Leo Adi Saputra Lestari, Melisa Yufit Lilik Dwi Setyana Mulyaman, Heri Bertus Nugroho Santoso Prabowo, M. Cahyo Adi Prasta, Silvano Virgio Prasta Pratama, Wisnu Bayu Putra, Arya Pratama Radhian Krisnaputra Rakhman, Fikri Arif Septhia Irawati, Inggar Setyawan Bekti Wibowo Sidiq Syamsul Hidayat, Sidiq Syamsul SUGIYANTO Yani Kurniawan, Yani