High Temperature In Situ Compression of Thermoplastically Formed Nano-scale Metallic Glass

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• 作者：Sanghita Mridha ; Harpreet Singh Arora ; Joseph Lefebvre ; Sanjit Bhowmick…
• 刊名：JOM
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：69
• 期：1
• 页码：39-44
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Engineering, general; Chemistry/Food Science, general; Physics, general; Environment, general; Earth Sciences, general;
• 出版者：Springer US
• ISSN：1543-1851
• 卷排序：69

文摘

The mechanical behavior of nano-scale metallic glasses was investigated by in situ compression tests in a scanning electron microscope. Platinum-based metallic glass nano-pillars were fabricated by thermoplastic forming. The nano-pillars and corresponding bulk substrate were tested in compression over the range of room temperature to glass transition. Stress–strain curves of the nano-pillars were obtained along with in situ observation of their deformation behavior. The bulk substrate as well as nano-pillars showed an increase in elastic modulus with temperature which is explained by diffusive rearrangement of atomic-scale viscoelastic units.