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.
作者
吴婧
杨忠波
朱其猛
刘然超
梁波
WU Jing;YANG Zhong-bo;ZHU Qi-meng;LIU Ran-chao;LIANG Bo(Nuclear Power Institute of China,Chengdu,Sichuan Prov.610041,China)
出处
《中国核电》
2020年第6期842-846,共5页
China Nuclear Power
关键词
疲劳寿命
疲劳极限
温度影响
韧性断裂
fatigue life
fatigue limit
temperature influence
ductile fracture
