Influence of laser surface melting treatment on the surface composition and mechanical properties of a Zr65Al7.5Ni10Cu12.5Ag5 bulk metallic glass
Influence of laser surface melting treatment on the surface composition and mechanical properties of a Zr65Al7.5Ni10Cu12.5Ag5 bulk metallic glass
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激光表面熔化处理对Zr65Al7.5Ni10Cu12.5Ag5块体金属玻璃表面成分和力学性能的影响
DOI：
10.1016/j.jnoncrysol.2018.02.029
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发表时间：
2018-05
影响因子：
3.5
通讯作者：
Akihisa Inoue
中科院分区：
文献类型：
--
作者：
Lei Zuo;Ran Li;Yangyang Cheng;Mengmeng Meng;Tao Zhang;Akihisa Inoue
采用注射铜模铸造法制备了直径不超过5 mm的zr65al7.5 ni10cu12.5 ag5块状金属玻璃（BMG）。研究了激光表面熔化（LSM）处理对zr基BMG表面成分和力学性能的影响。结果表明，与铸态相比，经lsm处理后的试样塑性显著提高了约50%，同时通过lsm诱导蒸发降低Cu和Ag元素，使Zr含量增加。进一步注意到，随着试样尺寸的增大，塑性变形能力的增强更为明显。将LSM处理后的试样视为一种以未受影响区为基体，受影响区为第二相的复合材料，研究了LSM处理的效果。LSM处理的塑性增强与受影响区和未受影响区之间的相互作用密切相关。进一步假设影响区与非影响区之间缺乏相互作用，当影响区体积分数超过某一临界值时，LSM处理的塑性增强效果会下降，这与实验结果一致。这些结果为扩展LSM处理在改善bmg力学性能方面的应用提供了前景。
A Zr65Al7.5Ni10Cu12.5Ag5bulk metallic glass (BMG) containing immiscible elements was prepared in the diameter range up to 5 mm by injection copper mold casting. The effects of the laser surface melting (LSM) treatment on the surface composition and mechanical properties of the Zr-based BMG were examined. It is found that the plasticity of the LSM-treated specimens is improved significantly by ~50% as compared with that of the as-cast ones, accompanied by the enrichment of Zr content through the reductions in Cu and Ag elements by LSM-induced evaporation. It is further noticed that the enhancement of plastic deformability is much distinct for the specimen with a larger size. The effects of LSM treatment is studied by considering the LSM-treated specimen as a kind of composite with the uninfluenced zone as the substrate and the influenced zone as the second phase. The plasticity enhancement of LSM treatment is closely related to the interaction between the influenced zone and the uninfluenced zone. Furthermore, it is assumed that the effectiveness of LSM treatment in plasticity enhancement will decrease when the volume fraction of the influenced zone exceeds a critical value due to the lack of interaction between the influenced zone and the uninfluenced zone, which is consistent with the experimental results. These results are promising for extending the applications of LSM treatment for the improvement of mechanical properties of BMGs.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
4.6
作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
--
发表时间：
1989-05
期刊：
--
影响因子：
--
作者：
F. D. Boer
通讯作者：
F. D. Boer