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TORWIRE SIGNED

Mechanical Behavior of Microscale Metallic Wires under Torsional and Tensile Loadings at Elevated Temperatures

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

TORWIRE project word cloud

Explore the words cloud of the TORWIRE project. It provides you a very rough idea of what is the project "TORWIRE" about.

documented plasticity anomalous tests corresponding gradients physical samples ambiguous strength heating cyclic room heated fellow analyze behavior smaller theories electrical experimentally micron underlying grain complementary temperature deformation tension elevated size micro understand theoretical extensively mechanical wires engineering homemade intend phenomena observation strain diameter prepared coupling diameters integrate perform mechanisms thickness torsion wire phenomenon length thin passing stronger effect plan reports temperatures technique plastic reported wall nano situ materials tubes bauschinger small nonuniform first relation lightweight volumes recovery experimental metallic sizes

Project "TORWIRE" data sheet

The following table provides information about the project.

Coordinator	QUEEN MARY UNIVERSITY OF LONDON Organization address address: 327 MILE END ROAD city: LONDON postcode: E1 4NS website: http://www.qmul.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	United Kingdom [UK]
Project website	https://dreamerdabiao.wixsite.com/mechanics/torwire
Total cost	146˙591 €
EC max contribution	146˙591 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2015
Funding Scheme	MSCA-IF-EF-ST
Starting year	2016
Duration (year-month-day)	from 2016-08-01 to 2018-01-31

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	QUEEN MARY UNIVERSITY OF LONDON QUEEN MARY UNIVERSITY OF LONDON Organization address address: 327 MILE END ROAD city: LONDON postcode: E1 4NS website: http://www.qmul.ac.uk contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	UK (LONDON)	coordinator	146˙591.00

Map

Project objective

The size effects (smaller is stronger) and Bauschinger effects (plastic recovery) at room temperature have been extensively documented experimentally at the micro/nano-scale. However, the underlying deformation mechanisms remain ambiguous, particularly in the presence of strain gradients. In this project, we intend to develop an integrated micro-torsion and micro-tension technique with a heating and temperature-control element for investigating the mechanical behavior of micro-scale metallic wires/tubes at elevated temperatures. We study all three size effects, due to the grain size, due to nonuniform deformation, and due to the wire diameter, and their coupling effects, using samples with different diameters (or wall thickness) and controlled grain sizes. The Fellow has reported the first observation of anomalous plasticity in the cyclic torsion of micro-scale metallic wires at room temperature. However, there have been no reports on the phenomenon in the cyclic torsion of small volumes at elevated temperatures. In this proposal, we plan to perform the (cyclic) torsion tests on micron-scale metallic wires and tubes which are heated in situ by passing an electrical current, and then to analyze the relation between plastic recovery and temperature. A long term goal is to exploit the size effect in novel high-strength, lightweight materials through “length-scale engineering”. The main objectives are: • To integrate the different micro-torsion/tension experimental methods, and so that it can be used at high temperatures. • To perform (cyclic) torsion and tension tests on thin metallic wires/tubes at elevated temperature. • To integrate the complementary theoretical methods, used to understand the corresponding physical mechanisms for the observed phenomena. • To test existing theories for micro-scale plasticity by using the homemade samples, e.g. thin wires/tubes prepared with different grain sizes and diameters.

Publications

List of publications.
year	authors and title	journal	last update
2016	Dabiao Liu, Kai Peng, Yuming He Direct measurement of torsional properties of single fibers published pages: 115017, ISSN: 0957-0233, DOI: 10.1088/0957-0233/27/11/115017	Measurement Science and Technology 27/11	2019-06-13
2017	Dabiao Liu, D.J. Dunstan Material length scale of strain gradient plasticity: A physical interpretation published pages: 156-174, ISSN: 0749-6419, DOI: 10.1016/j.ijplas.2017.07.007	International Journal of Plasticity 98	2019-06-13
2017	Dabiao Liu, Longteng Yu, Yuming He, Kai Peng, Jie Liu, Juan Guan, D. J. Dunstan Peculiar torsion dynamical response of spider dragline silk published pages: 13701, ISSN: 0003-6951, DOI: 10.1063/1.4990676	Applied Physics Letters 111/1	2019-06-13
2017	Shimin Zheng, Dabiao Liu, Yuming He The influence of fiber migration on the mechanical properties of yarns with hierarchical helical structures published pages: 88-105, ISSN: 0309-3247, DOI: 10.1177/0309324717750951	The Journal of Strain Analysis for Engineering Design 53/2	2019-06-13
2018	Dabiao Liu, Xu Zhang, Yuan Li, D.J. Dunstan Critical thickness phenomenon in single-crystalline wires under torsion published pages: 213-23, ISSN: 1359-6454, DOI: 10.1016/j.actamat.2018.03.022	Acta Materialia 150	2019-06-13
2017	D. Liu, Y. He, P. Hu, H. Ding Characterizing Torsional Properties of Microwires Using an Automated Torsion Balance published pages: 297-311, ISSN: 0014-4851, DOI: 10.1007/s11340-016-0212-8	Experimental Mechanics 57/2	2019-06-13
2017	D.J. Dunstan, Dabiao Liu Why abseiling spiders donâ€™t spin out of control â€“ new research published pages: , ISSN: , DOI:	The Conversation	2019-06-13

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