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研究了电解充氢对Ｌｌ２结构Ａｌ６７Ｔｉ２５Ｍｎ８金属间化合物力学性能的影响．结果表明，在压缩试验条件下，充氢不改变材料的屈服强度，但断裂强度及塑性却明显降低．通过断口分析，发现在三点弯曲的起裂边缘存在沿晶断裂的薄层，而在断口内部则基本仍为解理断裂．试样表面沿晶界开裂，并在晶界附近出现浮凸粒子．能谱分析表明为Ｔｉ富集的新相，经热力学分析应为Ｔｉ－Ｈ化合物．表明氢在晶界富集促进了晶间起裂，致使材料的强度和塑性下降．
The effect of hydrogenation on the mechanical properties of Al67Ti25Mn8 intermetallic compounds with Ll2 structure was studied. The results show that under the compression test conditions, hydrogen charging does not change the yield strength of the material, but the breaking strength and plasticity are significantly reduced. According to the fracture analysis, it is found that there is a thin layer of intergranular fracture at the beginning of the three-point bending, while the fracture is still basically cleaved inside the fracture. The specimen surface cracks along the grain boundaries and appears as embossed particles near the grain boundaries. The energy spectrum analysis shows a new phase enriched in Ti, which should be Ti-H compound by thermodynamic analysis. It shows that the hydrogen enrichment in the grain boundary promotes the intergranular cracking, resulting in the decrease of the strength and ductility of the material.