Abstract
The science and engineering application of fracture is attractive and complex in nature. The notch provided shear pin geometry design for lower and known stress concentration factor engineered for premature shear pin fracture failure. The shear pin is one among type of mechanical fuse, safeguard bigger industrial rotary components by premature failure. The notch provided in shear pin act as reduced notch toughness where crack initiation and propagation starts from notch surface due to overload stress in the system. Advancement in technologically of mechanical fuses is one such key area, with which design of engineered microstructure analysis of shear failure discussed extensively. In the present investigation, shear pin failure were characterized to determine root cause analysis. Visual examination of fracture surface reveals pure ductile adiabatic shear fracture and metallographic examinations reveals non uniform size of spheroidal cementite carbide particles distributed uniformly slipping in coarse ferrite matrix plane of maximum shear stress causes the reason for shear fracture phenomena during crack propagation.
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