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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Finite element evaluation of hydrogen solubility enhancements due to thermal residual stresses in palladium-alumina composites
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Finite element evaluation of hydrogen solubility enhancements due to thermal residual stresses in palladium-alumina composites

机译：钯-氧化铝复合材料中由于热残余应力导致氢溶解度提高的有限元评估

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摘要

Residual tensile stresses in materials result in hydrogen solubility enhancements. The residual thermal stresses and strains developed in Pd-alumina composites on cooling from several different high temperatures have been modeled by the finite element method (FEM). Two cases (alumina forming the inner core in the first case and Pd in the second case) were considered for modeling spherical alumina precipitates distributed in a spherical Pd matrix. The advantage of utilizing the FEM model is highlighted, namely the variation of stress components in different states of stress can be determined as a function of position in the composite. The FEM model provides insights into the locations where hydrogen will segregate. The stresses evaluated have also been related to hydrogen solubility enhancements.
机译：材料中的残余拉伸应力会导致氢溶解度提高。已经通过有限元方法（FEM）对Pd-氧化铝复合材料在几种不同的高温下冷却时产生的残余热应力和应变进行了建模。考虑了两种情况（在第一种情况下形成内芯的氧化铝和在第二种情况下形成Pd的氧化铝）来模拟分布在球形Pd基质中的球形氧化铝沉淀物。突出了利用FEM模型的优势，即可以确定应力在不同应力状态下的变化作为复合材料中位置的函数。有限元模型提供了对氢分离位置的见解。评估的应力也与氢溶解度的提高有关。

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