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

Total Cost €


EC-Contrib. €






Project "TORWIRE" data sheet

The following table provides information about the project.


Organization address
address: 327 MILE END ROAD
city: LONDON
postcode: E1 4NS

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
 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


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    QUEEN MARY UNIVERSITY OF LONDON UK (LONDON) coordinator 146˙591.00


 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.


year authors and title journal last update
List of publications.
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 don’t spin out of control – new research
published pages: , ISSN: , DOI:
The Conversation 2019-06-13

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