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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50778

Title: Stress Corrosion Cracking of A588 Steel Weldments in Flue Gas Related Environments
Authors: L.W. Tsay
W.Y. Chen
R.K. Shiue
R.H. Shiue
Contributors: 國立臺灣海洋大學:材料工程研究所
Keywords: hydrogen embrittlement
overlay welding
repair welding
slow strain rate tensile test
stress cor-rosion cracking
U-bend test
Date: 2001-08
Issue Date: 2018-10-23T07:56:07Z
Publisher: J Mats. Eng. Performance
Abstract: Abstract: This study investigated stress corrosion cracking (SCC) of A588 steel welds as determined by U-bend
immersion tests and slow strain rate tensile (SSRT) tests to evaluate the steel’s cracking susceptibility in
various regions of the weldments. The immersion test results indicated that the fusion zone (FZ) had better
corrosion resistance than the other regions in the weld. It was also demonstrated that the columnar grain
boundaries exhibited a higher resistance to corrosion than the grain interior of the FZ. However, the
coarse elongated ferrite in the FZ is susceptible to hydrogen embrittlement (HE), which results in the
formation of microcracks. As a result, a severe degradation of the weld’s tensile properties in the saturated
H2S solution was observed. Scanning electron microscope (SEM) fractographs of tensile specimens reveal
a cleavage fracture in the coarse-grained heat-affected zone (CGHAZ) and featherlike rupture in the FZ,
both indicating a high sensitivity to HE.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50778
Appears in Collections:[材料工程研究所] 期刊論文

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