摘要
为研究马氏体对锆合金拉伸性能的影响,采用静态环向拉伸试验方法对退火态及马氏体状态的Zr-Nb合金核燃料包壳管在室温和400℃下的环向拉伸性能进行了研究,并对拉伸断口进行了微观形貌的观察.结果表明:室温和400℃相比,马氏体状态的Zr-Nb合金相比退火态Zr-Nb合金强度高,韧性好,退火态Zr-Nb合金的局部塑性变形较大;从微观上看退火态和马氏体态Zr-Nb合金室温与400℃的拉伸断裂后均呈现微孔聚集型韧性断裂.
The tensile properties of martensitic and annealed Zr-Nb alloy nuclear fuel cladding tubes were studied by means of static ring tensile test at room temperature and 400℃.The tensile fractures were analysed by using SEM.The results show that martensitic Zr-Nb alloys have higher strength and better toughness than annealed Zr-Nb alloys,the annealed Zr-Nb alloys have larger local plastic tuan martensitic Zr-Nb alloys.The tensile fracture of martensitic and annealed Zr-Nb alloy occurs in the manner of microvoid coalescence at room temperature and 400 ℃ according to the SEM fracture surface observation.
出处
《西安工业大学学报》
CAS
2013年第4期319-323,共5页
Journal of Xi’an Technological University
基金
陕西省自然基金资助(2011JM7006)
