• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (20): 133-140.doi: 10.3901/JME.2021.20.133

• 材料科学与工程 • 上一篇    下一篇

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氢化物对锆合金薄板焊缝断裂行为的影响

王博1, 包陈1, 魏连峰2, 何广伟1   

  1. 1. 西南交通大学力学与工程学院 成都 610031;
    2. 中国核动力研究设计院反应堆燃料与材料重点实验室 成都 610041
  • 收稿日期:2020-04-20 修回日期:2021-03-05 出版日期:2021-10-20 发布日期:2021-12-15
  • 作者简介:王博,男,1994年出生。主要研究方向为材料断裂行为。E-mail:wyb54635593@163.com;包陈,男,1982年出生,副教授。主要研究方向为结构完整性评价。E-mail:bchxx@163.com;魏连峰,男,1981年出生,硕士,助理研究员。主要研究方向为核燃料与材料焊接技术及工程。E-mail:252044665@qq.com;何广伟,男,1991年出生,博士研究生。主要研究方向为材料断裂行为。E-mail:619041277@qq.com

Effect of Hydride on Fracture Behavior of Zirconium Alloy Platy Welds

WANG Bo1, BAO Chen1, WEI Lianfeng2, HE Guangwei1   

  1. 1. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031;
    2. Science and Technology on Reactor Fuel and Material Laboratory, Nuclear Power Institute of China, Chengdu 610041
  • Received:2020-04-20 Revised:2021-03-05 Online:2021-10-20 Published:2021-12-15

摘要: 锆合金被广泛应用于反应堆的燃料管包壳材料,当服役过程中锆合金的力学性能改变时,对其力学性能完整性的评估至关重要。基于小尺寸三点弯曲试样,建立锆合金薄板焊缝的断裂韧度测试方法,完成腐蚀渗氢后锆合金焊缝在室温和360℃下准静态断裂韧度试验,分析氢腐蚀和温度对锆合金焊缝断裂性能的影响。研究结果表明,氢腐蚀和温度均能对锆合金焊缝断裂性能产生显著影响,由于高温条件下聚集在裂尖附近的氢化物溶解,使得360℃下锆合金渗氢焊缝断裂韧度较室温下的断裂韧度有显著提升。

关键词: 锆合金, 焊缝, 渗氢腐蚀, 小试样, 断裂韧度

Abstract: Zirconium alloys are widely used in reactor fuel tube cladding, it is very important to evaluate the mechanical integrity of zirconium alloys when their mechanical properties change in service. Fracture toughness test method of small zirconium alloy platy welds was established based on small size three-point bending sample. The quasi-static fracture toughness tests of hydrogenated zirconium alloy welds at room temperature and 360℃ were carried out. The influence of hydrogen corrosion and temperature on fracture performance of zirconium alloy welds was analyzed. The results show that hydrogen corrosion and temperature can significantly affect the fracture properties of zirconium alloy welds. The fracture toughness of hydrogenated zirconium alloy welds at 360℃ enhances evidently compared with that at room temperature because of the dissolution of the hydrides distributed around crack tip.

Key words: zirconium alloy, weld, hydrogen corrosion, small sample, fracture toughness

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