Improvement in mechanical properties of a Zr-based bulk metallic glass by laser surface treatment
Improvement in mechanical properties of a Zr-based bulk metallic glass by laser surface treatment
复制标题
通过激光表面处理提高Zr基大块金属玻璃的机械性能
DOI：
10.1016/j.jallcom.2010.04.053
复制
发表时间：
2010-08-01
影响因子：
6.2
通讯作者：
Zhang, Tao
中科院分区：
文献类型：
--
作者：
Chen, Bingqing;Pang, Shujie;Zhang, Tao
采用激光表面熔化（LSM）技术对Zr(55)Cu(30)Al(10)Ni(5)块状金属玻璃进行表面改性，以改善其力学性能。用高能同步衍射和差示扫描量热仪分别表征了铸态和LSM处理后试样的组织和热性能。激光表面重熔后，Zr(55)Cu(30)Al(10)Ni(5)合金仍为完全非晶结构。与塑性不明显的铸态zr基合金相比，LSM处理后的合金在断裂前表现出5.3%的压缩塑性应变。LSM处理后金属玻璃力学性能的改善可能是由于LSM处理引起的复杂的残余应力分布和表层自由体积的增加。(C) 2010 Elsevier B.V.版权所有
In this work, surface modification of Zr(55)Cu(30)Al(10)Ni(5) bulk metallic glass for improving the mechanical properties was carried out by employing laser surface melting (LSM) treatment. The structures and thermal properties of the as-cast and LSM treated samples were characterized with high energy synchrotron diffraction and differential scanning calorimeter, respectively. After the laser surface remelting, the Zr(55)Cu(30)Al(10)Ni(5) alloy still consisted of fully amorphous structure. In comparison to the as-cast Zr-based alloy without distinct plasticity, the LSM treated one exhibited compressive plastic strain of 5.3% prior to fracture. The improvement in mechanical behavior of the LSM treated metallic glass may be resulted from complex residual stress distributions and increase in free volume in the surface layer induced by LSM treatment. (C) 2010 Elsevier B.V. All rights reserved.