锆合金中氢化物的微观力学性能
Micro-mechanical Properties of Hydride in Zirconium Alloy
摘 要
通过吸氢试验在轧制退火态Zr-4锆合金表面制备了氢化物，并使用X射线衍射仪对其物相组成进行了分析，然后使用纳米力学探针结合扫描电镜观察研究了Zr-4锆合金中析出氢化物的微观力学性能。结果表明：Zr-4锆合金中析出的氢化物主要为δ-氢化物，其断裂韧度KIC为（1.93±0.29）MPa·m0.5，远低于α-Zr相的；其杨氏模量为95.113 GPa，与α-Zr相的相当；同时测得该δ-氢化物的纳米硬度为4.047 GPa，高于α-Zr相的；说明Zr-4锆合金中析出的δ-氢化物为硬脆相。
氢化物
微观力学性能
纳米力学探针
断裂韧度
杨氏模量
硬度
zirconium alloy
hydride
micro-mechanical property
nano-indentation
fracture toughness
Young's modulus
hardness
Abstract
Hydride was prepared on the surface of rolled and annealed Zr-4 zirconium alloy by hydrogen absorption test. The phase compositions of the precipitated hydride were analyzed by X-ray diffractometer (XRD), and the micro-mechanical properties were studied with nano-indentation combined with scanning electron microscope (SEM) observation. The results show that the hydride precipitated in the Zr-4 zirconium alloy was mainly δ-hydride. The fracture toughness KIC of the δ-hydride was (1.93±0.29) MPa·m0.5 which was far lower than that of α-Zr phase, the Young's modulus of it was 95.113 GPa which was close to that of α-Zr phase, and the nano-hardness of it was 4.047 GPa which was higher than that of α-Zr phase. So the δ-hydride precipitated in the Zr-4 zirconium alloy is a kind of hard and brittle phase.
中图分类号 TG146.4 DOI 10.11973/lhjy-wl201702002
所属栏目 试验与研究
基金项目 国家自然科学基金资助项目（21171018，51271021）
收稿日期 2016/4/20
修改稿日期
网络出版日期
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备注张诚(1990-),男,博士研究生,主要从事金属基储氢材料研究。
引用该论文: ZHANG Cheng,LIU Jing-ru,YANG Yun,SONG Xi-ping. Micro-mechanical Properties of Hydride in Zirconium Alloy[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2017, 53(2): 85～88
张诚,刘敬茹,杨云,宋西平. 锆合金中氢化物的微观力学性能[J]. 理化检验－物理分册, 2017, 53(2): 85～88
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【3】KIM J S,KIM T H,KOOK D H,et al.Effects of hydride morphology on the embrittlement of Zircaloy-4 cladding[J].Journal of Nuclear Materials,2015,456:235-245.
【4】BILLONE M C,BURTSEVA T A,EINZIGER R E.Ductile-to-brittle transition temperature for high-burnup cladding alloys exposed to simulated drying-storage conditions[J].Journal of Nuclear Materials,2013,433(1):431-448.
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【6】PULS M P,SHI S Q,RABIER J.Experimental studies of mechanical properties of solid zirconium hydrides[J].Journal of Nuclear Materials,2005,336(1):73-80.
【7】YAMANAKA S,YOSHIOKA K,UNO M,et al.Thermal and mechanical properties of zirconium hydride[J].Journal of Alloys and Compounds,1999,293:23-29.
【8】SIMPSON L A,CANN C D.Fracture toughness of zirconium hydride and its influence on the crack resistance of zirconium alloys[J].Journal of Nuclear Materials,1979,87(2):303-316.
【9】杜军,张平,赵军军,等.显微硬度法与纳米压入法测量微米级硬质薄膜硬度的比较[J].理化检验-物理分册,2008,44(4):189-192.
【10】张丽,申亮,李瑞文,等.V-5Cr-5Ti合金富钛相析出区的显微维氏硬度测试[J].理化检验-物理分册,2014,50(9):651-654.
【11】XU J,SHI S Q. Investigation of mechanical properties of ε-zirconium hydride using micro- and nano-indentation techniques[J].Journal of Nuclear Materials,2004,327(2):165-170.
【12】KURODA M,SETOYAMA D,UNO M,et al.Nanoindentation studies of zirconium hydride[J].Journal of Alloys and Compounds,2004,368(1):211-214.
【13】EVANS A G,CHARLES E A.Fracture toughness determinations by indentation[J].Journal of the American Ceramic Society,1976,59(7):371-372.
【14】LAWN B R,EVANS A G,MARSHALL D B.Elastic/plastic indentation damage in ceramics:The median/radial crack system[J].Journal of the American Ceramic Society,1980,63(9):574-581.
【15】NIIHARA K,MORENA R,HASSELMAN D P H.Evaluation of KIC of brittle solids by the indentation method with low crack-to-indent ratios[J]. Journal of Materials Science Letters,1982,1(1):13-16.
【16】ANSTIS G R,CHANTIKUL P,LAWN B R,et al.A critical evaluation of indentation techniques for measuring fracture toughness:I,Direct crack measurements[J].Journal of the American Ceramic Society,1981,64(9):533-538.
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