ACCOMMODATION EFFECTS DURING ROOM-TEMPERATURE HYDROGEN TRANSFORMATIONS IN THE NIOBIUM HYDROGEN SYSTEM

被引：32
作者：
BALASUBRAMANIAM, R
机构：
[1] Department of Metallurgical Engineering, Indian Institute of Technology, Kanpur
来源：
ACTA METALLURGICA ET MATERIALIA | 1993年 / 41卷 / 12期
关键词：
D O I：
10.1016/0956-7151(93)90215-E
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The free energy loss has been theoretically evaluated in the model Nb-H system at 313 K for the solid solution --> monohydride and monohydride --> dihydride transformations. The origin for this hysteresis loss has been explained by considering the elasto-plastic accommodation processes that occur in the Nb-H system during these hydrogen transformations. The calculated free energy loss for the solid solution --> monohydride transformation shows excellent agreement with experimental results. Possible sources of error in the calculations have been elucidated. The present elasto-plastic approach is compared with previous theories of hysteresis. It is found that the elasto-plastic accommodation theory offers the best explanation for the hysteresis phenomenon observed in metal-hydrogen systems.
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页码：3341 / 3349
页数：9
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