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铜基大块非晶合金Cu52.5Ti30Zr11.5Ni6与Cu50.5Ti30Zr11.5Ni6Al2具有高的压缩断裂强度,分别为2212MPa与2286MPa;伸长率均达到2.1%。断口微观形貌分析表明,Cu基大块非晶合金具有3种不同类型的微观形貌,分别与断口的3个断裂扩展区域相对应,并且观察到绝热升温导致的断面局部熔化现象。显微硬度与纳米压痕测试证实了非晶合金的弹塑性变形机制。
Copper-based bulk amorphous alloy Cu52.5Ti30Zr11.5Ni6 and Cu50.5Ti30Zr11.5Ni6Al2 have high compressive strength at break of 2212MPa and 2286MPa, respectively, and the elongation reaches 2.1%. The micro-morphology of the fracture surface shows that the Cu-based bulk amorphous alloy has three different types of micro-morphology, corresponding to the three fracture extension regions respectively, and the phenomenon of localized melting caused by the adiabatic warming is observed. Microhardness and nanoindentation tests confirmed the elastic-plastic deformation mechanism of amorphous alloys.