聚变应用钒合金抗氢脆性能的合金化设计

金属学报, 2002, 38(8): 839-843. doi: 10.3321/j.issn:0412-1961.2002.08.011

聚变应用钒合金抗氢脆性能的合金化设计

谌继明 ^1, , 室贺健夫 ^2, , 许增裕 ^3, , 邱绍宇 ^4, , 徐颖 ^5,

1.核工业西南物理研究院,成都,610041

2.核融合科学研究所,土岐市,日本

3.核工业西南物理研究院,成都,610041

4.中国核动力研究设计院核燃料与材料国家重点实验室,成都,610041

5.核工业西南物理研究院,成都,610041

基金项目: IEA(国际能源机构)国际合作项目

关键词：钒合金 , 氢脆 , 合金化设计

ALLOYING DESIGN FOR FUSION APPLICATION VANADIUM ALLOYS BASED ON HYDROGEN EMBITTLEMENT RESISTANCE

利用渗氢后的拉伸实验,研究了氢对几种钒合金拉伸性能的影响及其氢脆断裂特性,结果表明,合金元素和氧含量均严重影响钒合金的抗氢脆能力.低氧含量V4Cr4Ti合金发生氢脆断裂的临界氢含量大于200 μg/g,而当氧含量达到700-1100 μg/g时,对所有合金,该临界值低于90μg/g.合金中的置换式合金元素Ti,Si等总是加大钒晶体中的四面体间隙,使氢原子易于偏聚到置换原子周围,增大形成气团的可能性,加重了合金的氢致硬化程度.为改善钒合金的抗氢脆性能,应选用原子尺寸与V接近的合金元素,如W和Re等.

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聚变应用钒合金抗氢脆性能的合金化设计

ALLOYING DESIGN FOR FUSION APPLICATION VANADIUM ALLOYS BASED ON HYDROGEN EMBITTLEMENT RESISTANCE

参考文献