氢含量对Zr-Sn-Nb合金低周疲劳行为的影响(英文)  

Effect of Hydrogen Content on Low-Cycle Fatigue Behavior of Zr-Sn-Nb Alloy

作　　者：周军[1,2] 李中奎[2] 张建军[2] 田锋[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》2012年第9期1531-1534,共4页Rare Metal Materials and Engineering

基　　金：NSFC(50571083);National High-Tech Research and Development Projects“863”(2008AA031071)

摘　　要：研究氢对NZ2新锆合金(Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr)低周疲劳行为的影响规律,采用4种不同氢含量(未渗氢,200,450,730?g/g)的板材试样进行室温和375℃下的低周疲劳试验。结果表明,在375℃下,循环变形时发现了动态应变时效现象,渗氢及氢含量的变化不会影响动态应变时效的发生;氢可以提高375℃下NZ2合金的低周疲劳寿命并且导致氢致循环软化。The effects of absorbed hydrogen on behavior of NZ2 zirconium alloy （Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cr, in wt% designated as NZ2） were investigated. The sheet specimens were hydrided with different hydrogen contents： unhydrided （original hydrogen content）, 200, 450 and 730μg/g H and tested at room temperature and 375 ℃, respectively. The results show that dynamic strain ageing （DSA） can be observed during cyclic deformation of NZ2 alloy at 375 ℃. Even if the hydriding content is up to 730 μg/g it has no influence on DSA. Hydrogen can improve the fatigue life of NZ2 alloy at 375 ℃ and cause the cyclic softening.

关 键 词：锆合金 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]