Analysis of fractured JOHNSON SCREEN of HPNA absorption chamber

Venkataswamy, MA and Sujata, M and Keshab, Barai and Bhaumik, SK (2003) Analysis of fractured JOHNSON SCREEN of HPNA absorption chamber. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A failed Johnson screen was sent to the laboratory for analysis. The screen was found to have failed at the flange hub – screen joint. Analysis showed that the failure was due to inadequate welding of the flange hub with the ribs/stiffeners of the screen. The failure was by sudden overload. There were no indications of delayed failure like fatigue or stress corrosion cracking. Semi-quantitative analysis by EDX showed that the helical coil of the screen was made of SS 304 steel while the ribs/stiffener were made of SS 316 steel.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Johnson screen;welding;overload failure
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 07 Jul 2011 14:56
Last Modified: 07 Jul 2011 14:56
URI: http://nal-ir.nal.res.in/id/eprint/9288

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