【摘要】 对2种新型Zr-Sn-Nb系锆合金(SZA-4和SZA-6)管材和传统Zr-4合金管材在电解渗氢条件下的吸氢性能及机制进行了研究。结果表明,在供货状态下,SZA-4锆合金管材的吸氢倾向高于SZA-6锆合金管材,但经过完全再结晶退火处理后发现,SZA-4锆合金管材的吸氢倾向降低,而SZA-6锆合金管材的吸氢倾向增加,并且SZA-6锆合金管材的吸氢倾向反而高于SZA-4锆合金管材。与传统Zr-4合金管材相比,完全再结晶退火态的SZA-4和SZA-6锆合金管材在电解渗氢条件下的吸氢倾向均高于Zr-4合金管材。SZA-4和SZA-6锆合金管材吸氢倾向的变化与其内部析出的第二相有关。大量fcc结构的(Zr, Nb)2Fe第二相析出是导致完全再结晶退火态SZA-6锆合金吸氢倾向增加的主要原因。更多还原

【Abstract】 The hydrogen absorption properties and mechanism of two kinds of newly developed zirconium alloy(SZA-4 and SZA-6) tubes and Zr-4 alloy tube under the electrolytic hydrogenation condition were investigated. The results show that the hydrogen absorption tendency of SZA-4 alloy is higher than that of SZA-6 alloy under the as-received condition, while, after the recrystallization annealing, the hydrogen absorption tendency of SZA-4 alloy decreases, and the hydrogen absorption tendency of SZA-6 alloy increases. As a result, the hydrogen absorption tendency of SZA-6 alloy is higher than that of SZA-4 alloy, and both of them have a higher hydrogen absorption tendency than that of the traditional Zr-4 alloy. The changes of the hydrogen absorption tendency of SZA-4 and SZA-6 zirconium alloys are related to the precipitation of SPPs. A large amount of precipitated(Zr, Nb)2 Fe SPPs with fcc crystal structure in the SZA-6 alloy after recrystallization annealing lead to the hydrogen absorption tendency increasing.更多还原