Evaluation of delayed fracture property of outdoor-exposed high strength AISI 4135 steels
Evaluation of delayed fracture property of outdoor-exposed high strength AISI 4135 steels
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DOI：
10.1016/j.corsci.2010.05.038
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发表时间：
2010-10
影响因子：
8.3
通讯作者：
Songjie Li;E. Akiyama;N. Uno;K. Hirai;K. Tsuzaki;Boping Zhang
中科院分区：
文献类型：
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作者：
Songjie Li;E. Akiyama;N. Uno;K. Hirai;K. Tsuzaki;Boping Zhang
本文用缺口试件慢应变速率试验（SSRT）研究了抗拉强度分别为1490和1310MPa的AISI 4135高强钢B15和B13在农村和沿海地区户外暴露后的延迟断裂性能。在SSRT前将暴露的试样保持在潮湿介质中，以再现受锈层影响的活性氢进入并使氢分布均匀。研究了暴露位置和暴露时间对断裂应力的影响。B15的延迟断裂敏感性明显高于B13。
Delayed fracture properties of AISI 4135 high strength steels with 1490 and 1310MPa 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.