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RESEARCH PAPER

Failure Analysis of the Pressure Vessel by Stainless Steel: 1Cr18Ni9Ti

[+] Author and Article Information
Junbo Zhou, Kuisheng Wang

Beijing University of Chemical Technology, Beijing 100029, China

Liping Gao

Hebei Engineering Institute, Handan 056027, China

J. Pressure Vessel Technol 126(4), 414-418 (Dec 01, 2004) (5 pages) doi:10.1115/1.1811106 History: Received July 24, 2003; Revised September 01, 2004; Online December 01, 2004
Copyright © 2004 by ASME
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Figures

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The cracks on the cross section
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The basic structure is austenite and deformed martensite
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The cracks extend along crystals boundary and there is transcrystallization in some area
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The cracks on the vertical section have obvious dendriform branch
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The material structure is austenite deformed martensite and ferrite
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The cracks have branches at the tips and transcrystallization in some area
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Low amplification appearance of cracks
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High amplification appearance on the tips of cracks
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The main components on fracture are composed of trace K, Ca and Si
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The components of inside wall of enveloping heads of oxygen separator
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The components of the tips of cracks are composed of Cl, C, O and Fe, etc.
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The components of fracture are S, Cl, K and Ni, etc.
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The compositions of corrosion products are in two phases, the main compositions are Ca3AlF(SO4)(OH)8 and Fe3O4.
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A huge corrosion cell is made up between hydrogen separator and oxygen separator, in which the oxygen separator

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