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Title: Fractographic study of a thick wall pressure vessel failure

Abstract

The pressure vessel described in this paper is identified as Intermediate Test Vessel 1 (ITV-1) and was fabricated of SA508, Class 2 Steel. It was tested to failure at 54/sup 0/C (130/sup 0/F). The gross failure appeared to be a brittle fracture although accompanied by a measured strain of 0.9%. Seven regions of the fracture were examined in detail and the observed surfaces were compared to Charpy V-notch (C/sub v/) specimens of SA508, Class 2 steel broken at temperatures above and below the ductile to brittle transition temperature. Three samples from the vessel were taken in the region around the fatigue notch and four from areas well removed from the notch. All these were carefully examined both optically and by scanning electron microscopy (SEM). It was established that early crack extension was by ductile mode until a large flaw approximately 500 mm long 83 mm wide was developed. At this point the vessel could no longer contain the internal pressure and final rupture was by brittle fracture.

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
6160844
Report Number(s):
CONF-790730-2
TRN: 79-017446
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Conference
Resource Relation:
Conference: International Metallographic Society conference, Tamiment, PA, USA, 8 Jul 1979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 22 GENERAL STUDIES OF NUCLEAR REACTORS; PRESSURE VESSELS; STEEL-ASTM-A508; FAILURES; FRACTURE PROPERTIES; BRITTLENESS; CHARPY TEST; CRACKS; DUCTILITY; FRACTURES; TESTING; ALLOYS; CONTAINERS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; STEELS; TENSILE PROPERTIES; 360103* - Metals & Alloys- Mechanical Properties; 220200 - Nuclear Reactor Technology- Components & Accessories

Citation Formats

Canonico, D.A., Crouse, R.S., and Henson, T.J. Fractographic study of a thick wall pressure vessel failure. United States: N. p., 1979. Web.
Canonico, D.A., Crouse, R.S., & Henson, T.J. Fractographic study of a thick wall pressure vessel failure. United States.
Canonico, D.A., Crouse, R.S., and Henson, T.J. Mon . "Fractographic study of a thick wall pressure vessel failure". United States. https://www.osti.gov/servlets/purl/6160844.
@article{osti_6160844,
title = {Fractographic study of a thick wall pressure vessel failure},
author = {Canonico, D.A. and Crouse, R.S. and Henson, T.J.},
abstractNote = {The pressure vessel described in this paper is identified as Intermediate Test Vessel 1 (ITV-1) and was fabricated of SA508, Class 2 Steel. It was tested to failure at 54/sup 0/C (130/sup 0/F). The gross failure appeared to be a brittle fracture although accompanied by a measured strain of 0.9%. Seven regions of the fracture were examined in detail and the observed surfaces were compared to Charpy V-notch (C/sub v/) specimens of SA508, Class 2 steel broken at temperatures above and below the ductile to brittle transition temperature. Three samples from the vessel were taken in the region around the fatigue notch and four from areas well removed from the notch. All these were carefully examined both optically and by scanning electron microscopy (SEM). It was established that early crack extension was by ductile mode until a large flaw approximately 500 mm long 83 mm wide was developed. At this point the vessel could no longer contain the internal pressure and final rupture was by brittle fracture.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

Conference:
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