CuZr基块体非晶合金室温拉伸力学性能研究  

Tensile mechanical properties of CuZr-based bulk metallic glass at room temperature

作　　者：房连祥 李然[1] 张涛[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《功能材料》2015年第24期24027-24029,共3页Journal of Functional Materials

基　　金：国家自然科学基金重点资助项目(51131002)

摘　　要：由于受到制备尺寸和材料特性的限制,目前块体非晶合金力学性能的研究多集中在压缩力学性能的相关研究。选取Zr_(47)Cu_(46)Al_6Co_1块体非晶合金,研究该合金在室温条件下拉伸力学性能。实验结果表明,样品的拉伸断裂强度约为2 000 MPa,其断裂方式为无征兆的脆性断裂,断口表面光滑平整。其断口主要形貌为放射状的河流花纹,该图案是非晶合金拉伸断裂的典型形貌。根据样品的断口形貌观察,可以推断Zr_(47)Cu_(46)Al_6Co_1块体非晶合金室温拉伸断裂的方式与传统非晶合金拉伸断裂方式相一致。Due to the limitation of sample dimension and material properties,the studies related on the mechanical properties under compressive conditions of bulk metallic glasses are mainly focused so far. In this paper,a Zr_(47)Cu_(46)Al_6Co_1 bulk metallic glass was chosen for the evaluation of tensile mechanical properties at room temperature. The tensile strength of the samples is about 2 000 MPa at room temperature,comparable with the value of other similar Cu Zr-based bulk metallic glasses. The brittle fracture without yielding and ductility can be observed under the present conditions.The fracture surface of the failed samples is smooth with river-like patterns typical for the morphology of metallic glasses after tensile failure. The results suggested that the brittle fracture mechanism reported in other metallic glass systems controls the fracture behavior of the BMG.

关 键 词：块体非晶合金 室温拉伸 力学性能 脆性断裂 河流花纹 

分 类 号：TG139[一般工业技术—材料科学与工程]