期刊
APPLIED MATERIALS TODAY
卷 19, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apmt.2020.100567
关键词
Bulk metallic glass; Thermoplastic forming; Stretch blow molding; Superplastic forming
资金
- Consejo Nacional de Ciencia y Tecnologia and Secretaria de Energia (CONACYT-SENER)
- NSF IIP [1601867]
- U.S. Department of Energy through the Office of Science, Basic Energy Sciences, Materials Science and Engineering Division [DE SC0004889]
Bulk metallic glasses (BMGs) exhibit remarkable mechanical properties, such as high strength and elasticity, which is often paired with fracture toughness. Their supercooled liquid region gives rise to plastic-like processing and suggests parts and shapes that can otherwise not be obtained for crystalline metals. However, current processing techniques only allow for limited options in terms of geometry, thicknesses uniformity, and shape complexity. Here we introduce a new processing technique, stretch blow molding, to expand the range of possible parts and increase the available geometries that can be fabricated with BMGs. Additionally, a model is derived that allows for the quantification and prediction of stretch blow molding and provides insight into its potential use and limitations. We demonstrate that with stretch blow molding overall strains exceeding 2000% are achievable, compared to the previously reported 150% of blow molding. With the ability to stretch blow mold shapes that were previously unachievable with any other metal fabrication technique in a fast and economical manner, and the superb properties of BMGs, we look forward to a broad commercial adaptation of this technique. (C) 2020 Published by Elsevier Ltd.
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