2022年9月27日
Non-Hookean large elastic deformation in bulk crystalline metals
Nature Communications
- 巻
- 13
- 号
- 1
- 開始ページ
- 5307
- 終了ページ
- 5307
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/s41467-022-32930-9
- 出版者・発行元
- Springer Science and Business Media LLC
Abstract
Crystalline metals can have large theoretical elastic strain limits. However, a macroscopic block of conventional crystalline metals practically suffers a very limited elastic deformation of <0.5% with a linear stress–strain relationship obeying Hooke’s law. Here, we report on the experimental observation of a large tensile elastic deformation with an elastic strain of >4.3% in a Cu-based single crystalline alloy at its bulk scale at room temperature. The large macroscopic elastic strain that originates from the reversible lattice strain of a single phase is demonstrated by in situ microstructure and neutron diffraction observations. Furthermore, the elastic reversible deformation, which is nonhysteretic and quasilinear, is associated with a pronounced elastic softening phenomenon. The increase in the stress gives rise to a reduced Young’s modulus, unlike the traditional Hooke’s law behaviour. The experimental discovery of a non-Hookean large elastic deformation offers the potential for the development of bulk crystalline metals as high-performance mechanical springs or for new applications via “elastic strain engineering.”
Crystalline metals can have large theoretical elastic strain limits. However, a macroscopic block of conventional crystalline metals practically suffers a very limited elastic deformation of <0.5% with a linear stress–strain relationship obeying Hooke’s law. Here, we report on the experimental observation of a large tensile elastic deformation with an elastic strain of >4.3% in a Cu-based single crystalline alloy at its bulk scale at room temperature. The large macroscopic elastic strain that originates from the reversible lattice strain of a single phase is demonstrated by in situ microstructure and neutron diffraction observations. Furthermore, the elastic reversible deformation, which is nonhysteretic and quasilinear, is associated with a pronounced elastic softening phenomenon. The increase in the stress gives rise to a reduced Young’s modulus, unlike the traditional Hooke’s law behaviour. The experimental discovery of a non-Hookean large elastic deformation offers the potential for the development of bulk crystalline metals as high-performance mechanical springs or for new applications via “elastic strain engineering.”
- リンク情報
-
- DOI
- https://doi.org/10.1038/s41467-022-32930-9
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/36167802
- PubMed Central
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9515142
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000860852300014&DestApp=WOS_CPL
- URL
- https://www.nature.com/articles/s41467-022-32930-9.pdf
- URL
- https://www.nature.com/articles/s41467-022-32930-9
- ID情報
-
- DOI : 10.1038/s41467-022-32930-9
- eISSN : 2041-1723
- PubMed ID : 36167802
- PubMed Central 記事ID : PMC9515142
- Web of Science ID : WOS:000860852300014