Scanning Electron Microscopy in Failure Analysis and Accident Investigations

Venkataswamy, MA (2009) Scanning Electron Microscopy in Failure Analysis and Accident Investigations. In: National Conference on Scientific Achievements of SC & ST Scientists & Technologists, 14-16 April 2009, Bangalore.

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Abstract

Fractography is a science of studying fracture surface characteristics. When engineering structure/component fails it leaves certain signatures on its surface. The study of these signatures with the help of Scanning Electron Microscope (SEM) provides valuable information to (a) understand the failure process i.e. crack initiation and propagation directions (b) existence of loading conditions at the time of failure (c) underpin the causes of failure etc. In this paper, a few failure cases viz., failure of LPTR blade of aero engine, failure of engine of an aircraft, failure of roller shaft and input shaft of power steering, failure of bevel gear and pinion of engine gearbox were presented. The failure case studies amply show that fractographic study is inevitable for conducting successful failure analysis and accident investigation. Further, a typical fractographic features observed in CFRP composite laminates failed under different loading conditions were presented. This fractographic data obtained from laboratory control specimens extends SEM role in the analysis of composite material failures.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Scanning Electron Microscope, Failure Analysis, Composites, Fatigue, Fracture.
Subjects: SOCIAL AND INFORMATION SCIENCES > Documentation and Information Science
Depositing User: Users 10 not found.
Date Deposited: 24 Jan 2012 08:30
Last Modified: 24 Jan 2012 08:30
URI: http://nal-ir.nal.res.in/id/eprint/10259

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