期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 768, 期 -, 页码 392-398出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.260
关键词
Metals and alloys; Laser processing; Nitinol; Combinatorial synthesis
资金
- European Commission in the seventh Framework Programme [NMP4-LA-2011-263206]
- European Space Agency
- Accelerated Metallurgy Project
A new combinatorial alloy synthesis method (suspended droplet alloying) has been developed as a high-throughput approach for alloy discovery. The method is based on using a laser to melt elemental or alloyed wires fed at a controlled rate to achieve a specific chemistry. In this study, the metallurgical characteristics of alloy buttons created using this technique were assessed for TiNi-based shape memory alloy buttons deposited using pure Ni, Ti, and Cu wires. The microstructural and chemical inhomogeneity was assessed using quantitative electron microscopy and X-ray diffraction. Furthermore, the phase transformation temperatures of the coupons have been compared to cast and heat-treated (reference) samples. In general, the samples displayed a limited local deviation from the target chemistry (+/- 1 wt%), while displaying a fairly homogeneous microstructure with the expected phase distribution. Post-process homogenisation heat treatments enhanced the phase transformation response, approaching the response obtained from the reference samples. (C) 2018 Elsevier B.V. All rights reserved.
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