Effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass
Effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass
复制标题
低温对 Zr60Ni25Al15 大块金属玻璃力学行为的影响
DOI：
10.1016/j.msea.2013.06.063
复制
发表时间：
2013-11-01
期刊：
影响因子：
6.4
通讯作者：
Liaw, P. K.
中科院分区：
文献类型：
--
作者：
Li, Y. H.;Zhang, W.;Liaw, P. K.
研究了低温对具有高非晶形成能力的Zr60Ni25Al15块体非晶合金力学行为的影响。随着温度从293 K降低到77 K，BMG的压缩屈服应力从1791 MPa增加到2217 MPa，压缩塑性应变从3.5%增加到16.7%。同样，BMG表现出增强的拉伸断裂应力为2036 MPa和明显的拉伸塑性应变为0.14%，在77 K，相比于1743 MPa和0在293 K，分别。此外，BMG的弹性模量和德拜温度随着温度的降低而单调增加。从原子间的成键作用和自由体积的迁移与聚结作用两个方面讨论了低温下BMG强度和塑性增强的机理。(c)2013爱思唯尔有限公司版权所有。
The effects of cryogenic temperatures on mechanical behavior of a Zr60Ni25Al15 bulk metallic glass (BMG) with high glass-forming ability were investigated. With lowering the temperature from 293 K to 77 K, the compressive yield stress of the BMG increases from 1791 MPa to 2217 MPa, and the compressive plastic strain enhances from 3.5% to 16.7%. Similarly, the BMG exhibits an enhanced tensile fracture stress of 2036 MPa and a distinct tensile plastic strain of 0.14% at 77 K, compared to those of 1743 MPa and 0 at 293 K, respectively. In addition, the elastic moduli and Debye temperature of the BMG increase monotonously with decreasing temperature. The mechanisms of enhanced strength and plasticity of BMGs at cryogenic temperatures are discussed in terms of the inter-atomic bonding and the mobility and coalescence of free volumes. (c) 2013 Elsevier B.V. All rights reserved.