国产新锆合金疲劳性能研究  

Research on Fatigue Properties of New Pickaxe Alloy China

作　　者：吴婧[1] 杨忠波[1] 朱其猛 刘然超[1] 梁波[1] WU Jing;YANG Zhong-bo;ZHU Qi-meng;LIU Ran-chao;LIANG Bo(Nuclear Power Institute of China,Chengdu,Sichuan Prov.610041,China)

机构地区：[1]中国核动力研究设计院,四川成都610041

出　　处：《中国核电》2020年第6期842-846,共5页China Nuclear Power

摘　　要：采用高频疲劳试验机对SZA-4和SZA-6两种国产新锆合金进行了320℃、343℃及385℃疲劳试验,用SEM分析了疲劳断口特征。结果表明,随着试验温度从320℃增加至343℃,两种合金疲劳极限均明显下降,但试验温度进一步增加至385℃时,疲劳极限不变;SZA-4的疲劳极限下降趋势对温度的敏感性比SZA-6高,疲劳试样最后的断裂方式为典型的微孔聚集型韧性断裂,韧窝表现为抛物线孔坑。The fatigue life of SZA-4 and SZA-6 at 320℃,343℃and 385℃were measured by high frequency fatigue testing machine,and the fatigue fracture were analyzed by SEM technology.The results show that with the experimental temperature increased from 320℃to 343℃,the two kinds of alloy fatigue limit were significantly decreased,but the experimental temperature increased to 385℃,fatigue limit show almost no change.The fatigue limit of SZA-4,and the final fracture mode of the fatigue specimen is typical of micro air series toughness fracture,and the fossa is represented by parabolic hole.

关 键 词：疲劳寿命 疲劳极限 温度影响 韧性断裂 

分 类 号：TG14[一般工业技术—材料科学与工程]