不同氢含量的新锆合金(NZ2)的力学性能  

Mechanical Properties of New Zirconium Alloy (NZ2) with Different Hydrogen Content

作　　者：周军[1,2] 李中奎[2] 张建军[2] 王文生[2] 田锋[2] 周廉[1,2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2008年第12期2244-2248,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50571083)

摘　　要：通过研究不同氢含量(未渗氢,200,450,730μg/g)对NZ2新型Zr-Sn-Nb系锆合金的室温单调拉伸性能和低周疲劳性能的影响,发现氢化物能够提高NZ2合金的抗拉强度,降低其塑性。随着氢含量的增加,相同应变下材料的低周疲劳寿命下降,但含氢量达到某一饱和值时材料的低周疲劳性能降低幅度变缓。材料有循环软化趋势,NZ2锆合金含氢试样比无氢试样更容易出现循环软化现象。NZ2 is a new generation Zr-Sn-Nb zirconium alloy. The effects of hydrogen contents including 0 μg/g （natural hydrogen content）, 200 μg/g, 450 μg/g, 730 μg/g on the tensile and low cycle fatigue properties of Zr-Sn-Nb zirconium alloy at room temperature were investigated. The results show that hydrides can enhance the tensile strength, decrease ductility of NZ2 alloy, and shorten the LCF life, but when the hydrogen content reaches a certain value, the decline rate of LCF life will be very slow. NZ2 alloy emerges a property of cyclic softening, in addition, the extent of cyclic softening for hydrogen containing samples is higher than that of those without hydrogen containing at the same test conditions.

关 键 词：新锆合金(NZ2) 抗拉强度 低周疲劳 氢化物 

分 类 号：TG146.414[一般工业技术—材料科学与工程]