Stress corrosion cracking and hydrogen embrittlement studies of austenitic and ferritic steels by small punch test
Stress corrosion cracking and hydrogen embrittlement studies of austenitic and ferritic steels by small punch test
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通过小冲头试验研究奥氏体和铁素体钢的应力腐蚀开裂和氢脆
DOI：
10.1016/0022-3115(88)90409-6
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发表时间：
1988
影响因子：
3.1
通讯作者：
M. Saito
中科院分区：
文献类型：
--
作者：
T. Misawa;Y. Hamaguchi;M. Saito
成功开发了一种在高温高压水溶液中使用小型化试样的小型冲头（SP）测试装置，用于评估候选结构钢在水冷却环境中辐照下的抗应力腐蚀开裂（SCC）和腐蚀能力。在 523 K 的硼酸盐缓冲溶液中测量 304 型奥氏体和 HT-9 铁素体不锈钢的阳极极化曲线，并获得应力腐蚀的 SP 断裂起始能作为电位和应变速率的函数。使用小样本进行的 SP-SCC 测试表明，在腐蚀电位和钝化电位区域，304 型钢和 SCC 敏感性变得敏感。由于本工作中获得的 SCC 敏感性评估结果与使用单轴拉伸试样的流行慢应变率试验 (SSRT) 所证明的结果相当一致，因此提出 SP-SCC 试验作为使用辐照小型试样的 SCC 测试方法之一。观察了充氢对HT-9钢SP断裂行为的影响，并证实SP试验可用于评估候选铁素体钢的氢脆敏感性。
A small punch (SP) testing apparatus using miniaturized specimens in high temperature and high pressure aqueous solutions was successfully developed to evaluate the resistance to stress corrosion cracking (SCC) and corrosion of candidate structural steels in water-coolant environment under irradiation. Anodic polarization curves of Type 304 austenitic and HT-9 ferritic stainless steels were measured in borate buffered solutions at 523 K and SP fracture initiation energies of stress corrosion were obtained as a function of potential and strain rate. SP-SCC tests using small specimens showed that sensitized Type 304 steel and SCC susceptibility at the regions of corrosion potential and passive potential. Since the result of SCC susceptibility evaluation obtained in the presented work was in fair agreement with that demonstrated by popular slow strain rate test (SSRT) using uniaxial tensile specimens, the SP-SCC test was proposed as one of the SCC testing methods using irradiated miniaturized specimens. The effect of hydrogen charging on SP fracture behavior of HT-9 steel was observed and the SP test was confirmed to be useful for the evaluation of the susceptibility of candidate ferritic steels to hydrogen embrittlement.