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Abstract
ABSTRACTFractographical examinations present a good relationship between fracture surfacetopography and basic rupture mechanism. Fracture consists of crack formation (cracknucleation) and crack growth (crack propagation). Many parametres such as type ofloading, sensitivity of materials to crack play an important role on failure. Fracture inengineering alloys can occur by a transgranular (through the grains) or an intergranular(along the grain boundaries) fracture path.In this study newly developed boron added armor steel has been rolled to form sheetproduct. Heat treatment series including austenitization, quenching and then temperinghave been applied on boron added armor steel respectively. The effects of formedmicrostructures on mechanical properties have been studied extensively. Furthermorefailure mechanism has been determined through fractografical examinations by usingScanning Electron Microscopy (SEM). due to its high resolution. In general SEMexaminations are an important part of failure analysis.Failure analysis and type of fracture provide also a good approach to understand theballistic behaviour of armor steel. When the material is exposed to any kind of impactloading as performed by kinetic penetrator etc., it is obvious that the failure mode willgive information about its ballistic performance.
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