摘要
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。
Both bulk Cu52.5Ti30Zr11.5Ni6and Cu50.5Ti30Zr11.5Ni6Al2amorphous alloys exhibit high fracture strength of 2 212 MPa and 2 286 MPa,respectively,and the compressive elongation of the both reaches nearly 2.1%.Three different micro-morphologies can be observed on the fracture surfaces of the samples,which correspond to three fracture propagation zones on fracture surface.Meanwhile,localized melting induced by adiabatic heating may occur in the final failure micro-morphology.The elastic-plastic model via shear bands of the tested bulk metallic glasses was verified by micro-hardness and nano-indentation experiments.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第1期13-16,共4页
Special Casting & Nonferrous Alloys
关键词
铜基大块非晶合金
压缩断裂强度
断口微观形貌
弹塑性机制
Cu-Based Bulk Amorphous Alloy
Compressive Fracture Strength
Microstructure of Fracture Surface
Elastic-Plastic Mechanism
