Evaluation of delayed fracture property of outdoor-exposed high strength AISI 4135 steels
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- 作者：Songjie Li ; Eiji Akiyama ; Nobuyoshi Uno ; Keiji Hirai ; Kaneaki Tsuzaki ; Boping Zhang
- 关键词：A. Steel ; B. Hydrogen permeation ; B. SEM ; C. Hydrogen embrittlement ; C. Hydrogen absorption ; C. Atmospheric corrosion
- 刊名：Corrosion Science
- 出版年：2010
- 出版时间：October 2010
- 年：2010
- 卷：52
- 期：10
- 页码：3198-3204
- 全文大小：1281 K
文摘
Delayed fracture properties of AISI 4135 high strength steels with 1490 and 1310 MPa of tensile strength, represented as B15 and B13, respectively, have been studied by means of slow strain rate test (SSRT) of notched bar specimens after outdoor exposure at rural and coastal areas. The exposed specimens were kept at humid medium before SSRT to reproduce active hydrogen entry influenced by the rust layer and to homogenize hydrogen distribution. The influences of exposure site and exposure time on fracture stress have been investigated. The susceptibility of B15 to delayed fracture was obviously higher than that of B13.