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Conference Paper: Ultra-strong and Ductile Nanotwinned Steel
Title | Ultra-strong and Ductile Nanotwinned Steel |
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Authors | |
Issue Date | 2017 |
Publisher | The Minerals, Metals & Materials Society (TMS). |
Citation | The Minerals, Metals & Materials Society (TMS) 146th Annual Meeting & Exhibition, San Diego, CA, 26 February-2 March 2017 How to Cite? |
Abstract | An ultra-strong and ductile nanotwinned steel was fabricated by a simple thermomechanical treatment consisting of cold rolling and recovery annealing. Different to other lab-scale methods making nano-structured materials, the present simple thermomechnical treatment is suitable for large-scale production in the steel industry using existing facilities, which makes the present steel being an attractive structure material. The nanotwinned steel achieved a high yield strength (1450 MPa), high ultimate tensile strength (1600 MPa) and considerable uniform tensile elongation (20%). The average twin thickness and spacing are 5 nm and 40 nm, respectively. The deformation mechanism of the present nanotwinned steel is investigated by synchrotron X-ray diffraction, transmission electron microscopy, nanoindentation and electrical resistivity, illustrating that the dislocation density increases dramatically with strain while the volume fraction of nanotwins remains constant. A physically-based model is proposed to simulate the evolution of dislocation density and stress-strain relation, showing good agreement with the experimental results. |
Description | Symposium: Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties |
Persistent Identifier | http://hdl.handle.net/10722/254324 |
DC Field | Value | Language |
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dc.contributor.author | Zhou, P | - |
dc.contributor.author | Liu, R | - |
dc.contributor.author | Wang, X | - |
dc.contributor.author | Huang, M | - |
dc.date.accessioned | 2018-06-14T01:47:31Z | - |
dc.date.available | 2018-06-14T01:47:31Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | The Minerals, Metals & Materials Society (TMS) 146th Annual Meeting & Exhibition, San Diego, CA, 26 February-2 March 2017 | - |
dc.identifier.uri | http://hdl.handle.net/10722/254324 | - |
dc.description | Symposium: Multiscale Architectured Materials (MAM II): Tailoring Mechanical Incompatibility for Superior Properties | - |
dc.description.abstract | An ultra-strong and ductile nanotwinned steel was fabricated by a simple thermomechanical treatment consisting of cold rolling and recovery annealing. Different to other lab-scale methods making nano-structured materials, the present simple thermomechnical treatment is suitable for large-scale production in the steel industry using existing facilities, which makes the present steel being an attractive structure material. The nanotwinned steel achieved a high yield strength (1450 MPa), high ultimate tensile strength (1600 MPa) and considerable uniform tensile elongation (20%). The average twin thickness and spacing are 5 nm and 40 nm, respectively. The deformation mechanism of the present nanotwinned steel is investigated by synchrotron X-ray diffraction, transmission electron microscopy, nanoindentation and electrical resistivity, illustrating that the dislocation density increases dramatically with strain while the volume fraction of nanotwins remains constant. A physically-based model is proposed to simulate the evolution of dislocation density and stress-strain relation, showing good agreement with the experimental results. | - |
dc.language | eng | - |
dc.publisher | The Minerals, Metals & Materials Society (TMS). | - |
dc.relation.ispartof | Minerals, Metals & Materials Society (TMS) Annual Meeting and Exhibition, 2017 | - |
dc.title | Ultra-strong and Ductile Nanotwinned Steel | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Huang, M: mxhuang@hku.hk | - |
dc.identifier.authority | Huang, M=rp01418 | - |
dc.identifier.hkuros | 276829 | - |
dc.publisher.place | United States | - |