氢渗透引起金属膜的塑性形变  

PLASTIC DEFORMATION OF METALLIC MEMBRANE INDUCED BY HYDROGEN PERMEATION

作　　者：侯民强[1] 张武寿[1] 

机构地区：[1]中国科学院化学研究所胶体界面与化学热力学实验室,北京100080

出　　处：《金属学报》2007年第3期327-331,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金项目20673129;20103009;10176030;10145006;科技部基础研究前期专项2002CCD01900资助~~

摘　　要：将板壳力学、弹塑性力学、热应力理论与金属-氢相互作用理论相结合,讨论了氢进入金属柱形薄膜后晶格膨张产生的弹性应力、塑性应力和残余应力及这些应力对氢分布和输运、材料性质的影响．结果表明,塑性区中氢的扩散变慢,残余应力改变了样品局域的吸氢热力学性质;在充氢过程中,只有小的充氢流才可能避免材料的塑性损伤,该结果可为氢的提纯、同位素分离以及氢的贮存与输运等应用提供参考．A model for hydrogen diffusion across a metallic tube type membrane is established. This model is a combination of the shell mechanics, elastoplastic mechanics, theories of thermo-stresses and metal-hydrogen interactions. Elastic, plastic and residual stresses and their effects on hydrogen distribution and transportation and material properties are discussed. It is found that the hydro- gen diffusion slows down in the plastic region and local thermodynamic properties of metal-hydrogen systems are modified. The plastic stress can be avoided by using small charging current during hydrogen charging processes. This result can be used for applications of hydrogen purification, isotopic separation, storage and transportation.

关 键 词：氢渗透膜 钯合金 自应力 塑性应力 

分 类 号：TG146[一般工业技术—材料科学与工程] O646[金属学及工艺—金属材料]