2007•Physical Testing and Chemical AnalysisRequires access

FAILURE ANALYSIS OF 40Mn18Cr4V STEEL BOLT

Yang Xiang-wei

Abstract

The bolt was ruptured during assembly.The fracture analysis of bolt was carried out by means of microstructure examination and SEM observation.The results showed that,the non-homogeneous distribution of string inclusions and stresses caused axial cracks,which gradually extended till fracture at stress concentration of crack tip under prefastening force and hot expansion action.

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Key concepts: Materials science, Fracture (geology), Homogeneous, Microstructure, Composite material, Mathematics, Combinatorics