Radiation hardening and IASCC susceptibility of extra high purity austenitic stainless steel
Radiation hardening and IASCC susceptibility of extra high purity austenitic stainless steel
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DOI：
10.1016/j.jnucmat.2010.12.154
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发表时间：
2011-10
影响因子：
3.1
通讯作者：
I. Ioka;Y. Ishijima;K. Usami;Naotoshi Sakuraba;Y. Kato;K. Kiuchi
中科院分区：
文献类型：
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作者：
I. Ioka;Y. Ishijima;K. Usami;Naotoshi Sakuraba;Y. Kato;K. Kiuchi
开发了一种超高纯度奥氏体不锈钢（EHP合金：Fe-25 Cr-35 Ni SAR），并提出了辐射辅助应力腐蚀开裂（IASCC）的对策。为了研究EHP合金的辐射硬化和IASCC敏感性，在553± 20 K的温度下，在1.5× 1025 n/m2的氦氮混合气体中对EHP合金进行了辐照。中子辐照后的试样分别在561 K的空气和561 K的高纯水中进行拉伸试验和慢应变速率试验。在拉伸试验和SSRT后使用SEM检查断裂表面。EHP合金的辐射硬化趋势与304和316不锈钢相同。虽然这些措施对抑制辐照硬化的效果不大。EHP合金具有良好的抗IASCC性能，其强度可达1.5× 1025 n/m2。
An extra high purity austenitic stainless steel (EHP alloy: Fe–25Cr–35Ni SAR) was developed with countermeasures for irradiation assisted stress corrosion cracking (IASCC). To study the radiation-induced hardening and the susceptibility of IASCC for EHP alloy, EHP alloys were irradiated at 553±20K in a helium and nitrogen gas mixture at the fluence level of 1.5×1025n/m2. After neutron irradiation, tensile tests and slow strain rate tests (SSRTs) of irradiated specimens were conducted in air at 561K and in oxygenated high purity water at 561K, respectively. The fracture surfaces were examined using SEM after tensile tests and SSRTs. The tendency of radiation-induced hardening of EHP alloy was the same as irradiated type 304 and type 316 stainless steels. Though there was a little effect of the countermeasures on the suppression of irradiation hardening. EHP alloy had excellent resistance for IASCC up to 1.5×1025n/m2.