Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing.
Viscous Flow of Supercooled Liquid in a Zr-Based Bulk Metallic Glass Synthesized by Additive Manufacturing.
复制标题
通过添加剂制造合成的基于ZR的块状金属玻璃中的超冷液体的粘性流动。
DOI：
10.3390/ma13173803
复制
发表时间：
2020-08-28
期刊：
影响因子：
--
通讯作者：
Scudino S
中科院分区：
文献类型：
--
作者：
Kosiba K;Deng L;Scudino S
使用传统铸造技术形成玻璃所需的临界冷却速率对样品尺寸的限制可能是大块金属玻璃（BMG）在结构应用中广泛使用的最关键限制。最近，通过增材制造加工玻璃成形系统克服了这一缺点，最终实现了无尺寸限制的BMG合成。虽然通过增材制造的加工允许制造几乎没有形状限制的BMG物体，但是增材制造的BMG的热塑性成形对于材料优化可能是必要的。BMG的热塑性成型在高于玻璃化转变温度下进行，其中这些材料表现为高粘性液体;因此粘度的分析是首要的。本文研究了用铸造法和激光粉末床熔融法制备的Zr 52.5Cu 17.9Ni 14.6Al 10 Ti 5非晶合金的粘度随温度的变化规律。我们观察到微小的差异，由不同的技术，可以归因于更高的孔隙率的LPBF金属玻璃制造的试样的粘性流。然而，本结果揭示了铸造和LPBF材料中粘度的类似总体变化，这提供了使用已经开发的热塑性成形技术来成形增材制造的BMG的机会。
The constraint in sample size imposed by the critical cooling rate necessary for glass formation using conventional casting techniques is possibly the most critical limitation for the extensive use of bulk metallic glasses (BMGs) in structural applications. This drawback has been recently overcome by processing glass-forming systems via additive manufacturing, finally enabling the synthesis of BMGs with no size limitation. Although processing by additive manufacturing allows fabricating BMG objects with virtually no shape limitation, thermoplastic forming of additively manufactured BMGs may be necessary for materials optimization. Thermoplastic forming of BMGs is carried out above the glass transition temperature, where these materials behave as highly viscous liquids; the analysis of the viscosity is thus of primary importance. In this work, the temperature dependence of viscosity of the Zr52.5Cu17.9Ni14.6Al10Ti5 metallic glass fabricated by casting and laser powder bed fusion (LPBF) is investigated. We observed minor differences in the viscous flow of the specimens fabricated by the different techniques that can be ascribed to the higher porosity of the LPBF metallic glass. Nevertheless, the present results reveal a similar overall variation of viscosity in the cast and LPBF materials, which offers the opportunity to shape additively manufactured BMGs using already developed thermoplastic forming techniques.
登录
查看更多内容
影响因子：
4.6
作者：
Kosiba K;Pauly S
通讯作者：
Pauly S
DOI：
10.1016/j.msea.2019.138535
发表时间：
2020-01-07
影响因子：
6.4
作者：
Best, James P.;Ast, Johannes;Kruzic, Jamie J.
通讯作者：
Kruzic, Jamie J.
DOI：
10.3390/ma10060672
发表时间：
2017-06-19
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Gokuldoss PK;Kolla S;Eckert J
通讯作者：
Eckert J
影响因子：
64.8
作者：
KLEMENT, W;WILLENS, RH;DUWEZ, P
通讯作者：
DUWEZ, P
DOI：
10.1016/j.pnsc.2020.06.004
发表时间：
2020-06-01
影响因子：
4.7
作者：
Kosiba, Konrad;Rothkirch, Andre;Bednarcik, Jozef
通讯作者：
Bednarcik, Jozef