Jiang Bing, Wang Jianxin, Xu Lingfeng, Qian Chengyuan, Liu Tiexin, Dai Jiayu, Hou Xueling
Laboratory for Microstructures of Shanghai University, Shanghai 200444, China.
School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China.
Materials (Basel). 2018 Jun 4;11(6):947. doi: 10.3390/ma11060947.
In this paper, the effects of different melt spinning speeds on the mechanical properties of (TiZr)(NiCrV) amorphous ribbons were studied. Tensile tests of the specimens were used to investigate mechanical behavior and mechanical properties of amorphous ribbons. The effects of cooling rate on the glass transition temperature of amorphous ribbons was discussed. The correlation between the microstructure of serrated flow behavior in stress-strain curves and melt spinning speeds of ribbons was also evaluated. In addition, when the spinning speed was 45 m/s, a large number of dense and uniform dimples appeared on the fractured surface of the specimens. Furthermore, characteristics of serrated flow behavior were obvious, which meant that Ti-Zr-Ni-Cr-V amorphous ribbons showed minor plastic behavior. It is assumed that the influence of free volume led to a serrated flow behavior of the amorphous materials, and made the amorphous material exhibit partially plastic properties. Increasing the strain rate sensitivity meant the free volume increased with the increasing spinning speed. Tensile strength (σ) and elongation (δ) of samples exhibited a dramatic increasing trend with an increase in the spinning speed. In particular, Ti-Zr-Ni-Cr-V amorphous ribbons showed better mechanical properties, namely the tensile strength of the amorphous ribbon samples significantly increased from 321 MPa at a spinning speed of 30 m/s to 675 MPa at a speed of 45 m/s. The elongation increased from 0.53% at a speed of 30 m/s to 1.29% at a speed of 45 m/s.
本文研究了不同熔体纺丝速度对（TiZr）（NiCrV）非晶带材力学性能的影响。通过对试样进行拉伸试验来研究非晶带材的力学行为和力学性能。讨论了冷却速率对非晶带材玻璃化转变温度的影响。还评估了应力-应变曲线中锯齿状流动行为的微观结构与带材熔体纺丝速度之间的相关性。此外，当纺丝速度为45 m/s时，试样断口表面出现大量致密且均匀的凹坑。此外，锯齿状流动行为特征明显，这意味着Ti-Zr-Ni-Cr-V非晶带材表现出较小的塑性行为。据推测，自由体积的影响导致了非晶材料的锯齿状流动行为，并使非晶材料表现出部分塑性特性。应变率敏感性增加意味着自由体积随纺丝速度的增加而增加。样品的拉伸强度（σ）和伸长率（δ）随纺丝速度的增加呈现出显著的上升趋势。特别是，Ti-Zr-Ni-Cr-V非晶带材表现出更好的力学性能，即非晶带材样品的拉伸强度从纺丝速度为30 m/s时的321 MPa显著增加到速度为45 m/s时的675 MPa。伸长率从30 m/s速度下的0.53%增加到45 m/s速度下的1.29%。
