http://scholars.ntou.edu.tw/handle/123456789/4685
標題: | Stress corrosion cracking of A588 steel weldments in flue gas related environments | 作者: | Tsay, LW Chen, WY Shiue, RK Shiue, RH |
關鍵字: | hydrogen embrittlement;overlay welding;repair welding;slow strain rate tensile test;stress corrosion cracking;U-bend test | 公開日期: | 六月-2001 | 卷: | 10 | 期: | 3 | 起(迄)頁: | 371-377 | 來源出版物: | Journal of Materials Engineering and Performance | 摘要: | 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://scholars.ntou.edu.tw/handle/123456789/4685 | ISSN: | 1059-9495 | DOI: | 10.1361/105994901770345097 |
顯示於: | 光電與材料科技學系 |
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