Failure analysis of fasteners used in pressure safety index valve
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Failure analysis of fasteners used in pressure safety index valve
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| Creator |
Madan, M
Venkataswamy, MA Sujata, M Bhaumik, SK |
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| Subject |
Aeronautics (General)
Chemistry and Materials (General) |
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| Description |
Three out of the four fasteners sent for investigation were found to have fractured in the threaded region. The fractographic features were completely obliterated due to post fracture corrosion. However, microstructural study and compositional analysis confirmed that the failure of the studs was by chloride stress corrosion cracking (SCC). Examination revealed that the SCC was promoted due to high hardness of the studs. Measurements showed that studs have average hardness of 582 HV as against the specification of 321 BHN. A detailed analysis of the failure is presented in this report.
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| Publisher |
National Aerospace Laboratories
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| Date |
2007
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| Type |
Proj.Doc/Technical Report
NonPeerReviewed |
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| Identifier |
Madan, M and Venkataswamy, MA and Sujata, M and Bhaumik, SK (2007) Failure analysis of fasteners used in pressure safety index valve. Project Report. National Aerospace Laboratories, Bangalore, India.
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| Relation |
http://nal-ir.nal.res.in/9576/
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