论文部分内容阅读
Fe基块体非晶合金具有极高的强度但通常表现出显著的宏观脆性,因此用常规拉伸、压缩等方法对这类合金的塑性变形行为和机理的研究具有很大困难.利用纳米压入和单轴压缩方法研究了Fe_52Cr_15Mo_9Er_3C_15B_6块体非晶合金的变形行为,考查了不同加载速率和不同晶化程度对变形行为和力学性能的影响,结果表明铸态和不同晶化程度样品在所研究的加载速率范围内的塑性变形过程中均未出现锯齿流变现象.用剪切带的时间和空间特性探讨了这种Fe基块体非晶合金在纳米压入过程中的特殊变形行为及其形成机制.
Fe-based bulk amorphous alloys have extremely high strength but usually exhibit significant macroscopic brittleness, so it is very difficult to study the plastic deformation behavior and mechanism of these alloys by conventional drawing and compression methods. The deformation behavior of bulk Fe_52Cr_15Mo_9Er_3C_15B_6 bulk amorphous alloy was investigated by both uniaxial compression and uniaxial compression methods. The effects of different loading rates and different degrees of crystallization on the deformation behavior and mechanical properties were investigated. The results show that the as-cast and different crystallinity samples Of the loading rate range of the plastic deformation process are not sawtooth phenomenon of rheological shear band with the time and space characteristics of this Fe-based bulk amorphous alloy during nano-injection process of the special deformation behavior and its Form a mechanism.