| Z6CNT18-10奥氏体不锈钢扩散管在蒸汽疏水环境中的疲劳开裂特征 |
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| 引用本文： | 李心刚,郭凯,翟新年,黄进财. Z6CNT18-10奥氏体不锈钢扩散管在蒸汽疏水环境中的疲劳开裂特征[J]. 理化检验(物理分册), 2019, 0(5): 294-297 |
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| 作者姓名： | 李心刚 郭凯 翟新年 黄进财 |
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| 作者单位： | 大亚湾核电运营管理有限责任公司;中核深圳凯利核能服务有限公司 |
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| 摘 要： | 采用金相显微镜、扫描电镜、X射线衍射仪等对Z6CNT18-10奥氏体不锈钢扩散管在蒸汽疏水环境下的疲劳断口特征进行了研究。结果表明:与常见的疲劳裂纹常起源于外壁不同,在蒸汽疏水环境下的奥氏体不锈钢扩散管的疲劳裂纹起源于内壁,裂纹源处存在明显的氧化现象;裂纹附近的显微组织中存在一定量的驻留滑移带,疲劳条带间距很窄,几乎不存在瞬断区,属于高周疲劳。
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| 关 键 词： | 奥氏体不锈钢 扩散管 疲劳开裂 滑移带 |
Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment |
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| LI Xingang,GUO Kai,ZHAI Xinnian,HUANG Jincai. Fatigue Cracking Characteristics of Diffusion Pipes for Z6CNT18-10 Austenitic Stainless Steel in Steam Hydrophobic Environment[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2019, 0(5): 294-297 |
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| Authors: | LI Xingang GUO Kai ZHAI Xinnian HUANG Jincai |
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| Affiliation: | (Daya Bay Nuclear Power Operations and Management Co., Ltd., Shenzhen 518000, China;CNNC Shenzhen Kaili Group Co., Ltd., Shenzhen 518000, China) |
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| Abstract: | The fatigue fracture characteristics of diffusion pipes for Z6CNT18-10 austenitic stainless steel in steam hydrophobic environment were studied by means of metallographic microscope,scanning electron microscope and X-ray diffraction.The results show that the fatigue cracks of diffuser pipes for austenitic stainless steel in steam hydrophobic environment originated from the inner wall,and they were unlike common fatigue cracks which often originated from the outer wall.There was obvious oxidation phenomenon at the crack source.There were some stationary slip bands in the microstructures near the cracks.The fatigue bands had very narrow spacing.There was almost no the final fracture zone in the microstructures,which belongs to high cycle fatigue. |
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| Keywords: | austenitic stainless steel diffusion pipe fatigue cracking slip band |
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