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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/23632

Title: The effect of sensitization on the hydrogen-enhanced fatigue crack growth of two austenitic stainless steels
Authors: L. W. Tsay;Y. F. Liua;R. T. Huang;R. C. Kuo
Contributors: NTOU:Institute of Materials Engineering
Keywords: A. Stainless steel;C. Hydrogen-accelerated fatigue crack growth;C. Hydrogen embrittlement
Date: 2008-05
Issue Date: 2011-10-20T08:06:52Z
Publisher: Corrosion Science
Abstract: Abstract:Fatigue crack growth tests were performed to evaluate the susceptibility to hydrogen-enhanced crack growth of AISI 304 and 316 stainless steels (SSs). Sensitization treatment at 650 °C 100 h played little effect on the fatigue crack growth behavior in air, regardless of testing specimens. However, hydrogen accelerated the fatigue crack growth of various specimens to different degrees; sensitized specimens were more susceptible as compared with the un-sensitized ones.
Fatigue fracture appearance of various specimens tested in air exhibited mainly transgranular fatigue fracture together with rarely intergranular fracture and twin boundary separation. Meanwhile, intergranular fracture was found for sensitized specimens tested in hydrogen. Extensive quasi-cleavage fracture related to the strain-induced martensite accounted for the hydrogen-accelerated fatigue crack growth of unstable austenitic SSs. On the other hand, the lower susceptibility of 316H specimens could be attributed to the partial austenite transformation, as evidenced by a mixture of transgranular fracture feature and quasi-cleavage.
Relation: 50(5), pp.1360-1367
URI: http://ntour.ntou.edu.tw/handle/987654321/23632
Appears in Collections:[材料工程研究所] 期刊論文

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