| 唐晨,张伟,李正阳,蔡振兵.表面纳米化对锆合金微动腐蚀行为的影响[J].装备环境工程,2022,19(11):110-118. TANG Chen,ZHANG Wei,LI Zheng-yang,CAI Zhen-bing.Effect of Surface Nanocrystallization on Fretting Corrosion Behavior of Zirconium Alloy[J].Equipment Environmental Engineering,2022,19(11):110-118. |
| 表面纳米化对锆合金微动腐蚀行为的影响 |
| Effect of Surface Nanocrystallization on Fretting Corrosion Behavior of Zirconium Alloy |
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| DOI：10.7643/issn.1672-9242.2022.11.015 |
| 中文关键词: 锆合金 超声表面滚压 表面纳米化 腐蚀 微动腐蚀中图分类号:TG172 文献标识码:A 文章编号:1672-9242(2022)10-0110-09 |
| 英文关键词:zirconiumalloy ultrasonic surface rolling processing surfacenanocrystallization corrosion frettingcorrosion |
| 基金项目:国家自然科学基金重点项目(U2067221) |
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| Author | Institution |
| TANG Chen | Nuclear Power Institute of China, Chengdu 610213, China |
| ZHANG Wei | Nuclear Power Institute of China, Chengdu 610213, China |
| LI Zheng-yang | Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
| CAI Zhen-bing | Tribology Research Institute, Southwest Jiaotong University, Chengdu 610031, China |
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| 中文摘要: |
| 目的 研究N36锆合金表面纳米化层的形貌和微观结构，分析表面纳米化层的微动腐蚀机理。方法 采用超声表面滚压技术(USRP)对锆合金进行表面纳米化处理，研究不同滚压速度对表面纳米化层形貌、相组成、粗糙度、显微硬度、电化学腐蚀和微动腐蚀行为的影响。结果 USRP处理后，锆合金表面有明显的塑性变形痕迹，致使锆合金表面发生加工硬化，提高了表面的硬度。锆合金的腐蚀电流密度相较于基体更低，最大磨损深度和磨损率均低于基体。结论 USRP处理后的锆合金晶粒细化、晶界增多，提高了锆合金的表面活性，有利于钝化膜的形成。锆合金的磨损机理为氧化磨损和磨粒磨损的共同作用。 |
| 英文摘要: |
| The morphology and microstructureof N36 zirconium (Zr) alloy surface nanocrystallization layer were studied. The frettingcorrosion mechanism of the surface nanocrystallization layer was analyzed. Ultrasonic surface rolling processing (USRP) was used to preparesurface nanocrystallization layer on Zr alloys.The effects of rolling speeds on the morphology, phase composition, roughness, hardness, electrochemical corrosion and fretting corrosion behavior of the surface nanocrystallization layer were studied. Results shows thatZralloyafter USRP present plastic deformation trace.The plastic deformation on the surface of Zr alloy leads to work hardening and increases the surface hardness.The electrochemical corrosion tests indicate that Zr alloy after USRP shows a lower corrosion current density compared with substrate.The wear depth and wear rate of Zr alloy after USRP is lower than thatsubstrate. The Zr alloy after USRP refinegrain and increase the number of grain boundary, which improving the activity of Zr alloy and beneficial to form passivation film. The wear mechanism of Zr alloy after USRP is the interaction of oxidation wear and abrasive wear. |
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