Failure analysis of sliding plates of seat assembly

Suresh Kumar, M and Madan, M and Venkataswamy, MA and Sujata, M and Parameswara, MA and Bhaumik, SK (2005) Failure analysis of sliding plates of seat assembly. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

Edge tearing/cracking of sheet metal was noticed during cold forming operation of sliding plates of seat assembly of an automobile vehicle. Investigation revealed that the cracking was due to presence of excessive amount of non-metallic inclusions in the plate material. Microstructural study showed that the inclusion rating in the cracked plate material was ASTM B Thick series, 2 to 3 against the specification of Thin series, 0.5 to 1. The same in the uncracked plate material was found to be B Thin series, 1. It is recommended that cleaner material as per the specification be used to prevent recurrence of similar failures. In addition, inclusion-rating check in the raw material test schedule be incorporated as an acceptance/rejection criterion.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Sliding plate;cold forming;edge tearing/cracking;inclusions
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 20 Sep 2011 11:11
Last Modified: 20 Sep 2011 11:11
URI: http://nal-ir.nal.res.in/id/eprint/9960

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