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.

引用

页码：3341 / 3349

页数：9

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