TY - JOUR ID - 73141 TI - The Analysis of Wheel Loader Diesel Engine Crankshaft Failure JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Aliakbari, K AU - Safarzadeh, N AU - Mortazavi, S. S AD - Department of Mechanical Engineering, Faculty of Montazeri, Khorasan Razavi Branch, Technical and Vocational University (TVU), Mashhad, Iran. AD - aculty of Engineering, Islamic Azad University of Mashhad, Iran Y1 - 2018 PY - 2018 VL - 31 IS - 3 SP - 473 EP - 479 KW - Automotive engineering KW - Wheel loader KW - Crankshaft failure KW - Fatigue crack KW - Failure cause DO - N2 - The main purpose of this study is to review the cause for the crankshaft failure of six-cylinder diesel engine of a wheel loader after passing a short period of time. The failure had occurred after 4800 hours of in-service in the fifth crankpin of the crankshaft. Hardness and tensile tests were carried out to study their mechanical properties. Spectrophotometer machine was used to examine the chemical composition of the crankshaft material. To examine the material microstructure, its defects and the morphology of fracture surface, optical microscopes (OM) and scanning electronic microscopes (SEM) equipped with energy dispersive spectrometry (EDS) were used. The morphology of fracture surface showed that the fracture is of the smooth type and has occurred due to the fatigue. Main origin of the fatigue cracks appeared on the surface of the crankpin might be created by the existence of oil impurities, the impurities on the surface of the crankpin, inappropriate machining on the surface of the crankpin or severe wear and pitting from insufficient lubricating. UR - https://www.ije.ir/article_73141.html L1 - https://www.ije.ir/article_73141_d9b9edffd213b5d3182599d14b5eccfa.pdf ER -