In this study, the thermal stability of Ni–Nb–Ti metallic glasses was investigated under isothermal and non-isothermal conditions. The effectiveness of NiTi phases, one of the nanosized crystallized phases, as grain refiners for Al–Cu alloys was also investigated from a crystallographic point of view using the edge-to-edge matching (E2EM) model. Thermal analysis showed that NiTi phases promote solidification of α-Al, and these nanocrystalline phases also promote an Al–Cu eutectic reaction and inhibit the growth of eutectic phases. A significant refining effect of α-Al grains from 402.7 μm to 69.1 μm was achieved with 0.05 wt.% nanocrystalline phases. Simultaneously, values for yield strength, ultimate tensile strength and fracture strain of inoculated Al–Cu alloys were increased by 18%, 13% and 78% to 363.2 MPa, 534.3 MPa and 11.92%, respectively, when compared with those of uninoculated Al–Cu alloys. Strengthening mechanisms of Al–Cu alloys manipulated by the nanocrystalline phases are grain boundary strengthening and precipitation strengthening.

在这项研究中，研究了Ni-Nb-Ti金属玻璃在等温和非等温条件下的热稳定性。还使用边对边匹配（E2EM）模型从晶体学的角度研究了NiTi相（一种纳米晶化相）作为Al-Cu合金晶粒细化剂的有效性。热分析表明，NiTi相促进了α-Al的凝固，而这些纳米晶相也促进了Al-Cu共晶反应并抑制了共晶相的生长。用0.05重量％的纳米晶相实现了从402.7μm到69.1μm的α-Al晶粒的显着细化效果。同时，接种的Al-Cu合金的屈服强度，极限抗拉强度和断裂应变值分别增加了18％，13％和78％，分别为363.2 MPa，534.3 MPa和11.92％。与未接种的Al-Cu合金相比。纳米晶相控制的Al-Cu合金的强化机制是晶界强化和沉淀强化。