退火态及马氏体态Zr-Nb合金拉伸性能分析  

Study on Ring Tensile Properties of Martensitic and Annealed Zr-Nb Alloys

作　　者：王正品[1] 渠静雯[1] 高巍[1] 薛飞[2] 石崇哲[1] 

机构地区：[1]西安工业大学材料与化工学院,西安710021 [2]苏州热工研究院,苏州215004

出　　处：《西安工业大学学报》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)

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.

关 键 词：Zr-Nb合金 环向拉伸试验 马氏体 拉伸断口 

分 类 号：TG115.52[金属学及工艺—物理冶金]