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2020 bmw x7 sdrive40i rear passenger side axle shaft | 2020 bmw x7 sdrive40i rear passenger side axle shaft sale | 2020 bmw x7 sdrive40i rear passenger side axle shaft buy | 2020 bmw x7 sdrive40i rear passenger side axle shaft price Part 2020 bmw x7 sdrive40i | 2020 bmw x7 sdrive40i parts | 2020 bmw x7 sdrive40i accessory | 2020 bmw x7 sdrive40i parts sale | 2020 bmw x7 sdrive40i parts buy | 2020 bmw x7 sdrive40i parts price made of induction hardened steel removed from the scene of an overturned vehicle was analyzed to determine the most likely cause of the failure. Optical light metallography and scanning electron microscopy with energy dispersive spectroscopy were used to describe the microstructure and mechanical strength was assessed by microstructure measurements. The chemical analysis confirmed that the shaft is made of AISI 4140 steel according to the specifications. However, microstructural characteristics and microstructure measurements showed that the shaft was improperly subjected to heat treatment, resulting in a brittle case, in which crack propagation occurs in an intergranular state relative to shear within the core. This behavior was related to differences in microstructure, R c 58, and a mixture of perlite and ferrite inside the core with R c 25. It is not possible to reconstruct the exact sequence of events leading to fracture, it may be added by A large load inside the brittle started very hard, which could lead to the car overturning and the final fracture due to the overturning collision. However, the onset of cracking cannot be ruled out due to hydrogen produced by rust and water, as well as the possibility that vehicle overturning was the cause of the fracture.
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