A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Investigation of the electroplastic effect using nanoindentation
A promising approach to deform metallic-intermetallic composite materials is the application of electric current pulses during the deformation process to achieve a lower yield strength and enhanced elongation to fracture. This is known as the electroplastic effect. In this work, a novel setup to study the electroplastic effect during nanoindentation on individual phases and well-defined interfaces was developed. Using a eutectic Al-Al2Cu alloy as a model material, electroplastic nanoindentation results were directly compared with macroscopic electroplastic compression tests. The results of the micro- and macroscopic investigations reveal current induced displacement shifts and stress drops, respectively, with the first displacement shift/stress drop being higher than the subsequent ones. A higher current intensity, higher loading rate and larger pulsing interval all cause increased displacement shifts. This observation, in conjunction with the fact that the first displacement shift is highest, strongly indicates that de-pinning of dislocations from obstacles dominates the mechanical response, rather than solely thermal effects.
Investigation of the electroplastic effect using nanoindentation
A promising approach to deform metallic-intermetallic composite materials is the application of electric current pulses during the deformation process to achieve a lower yield strength and enhanced elongation to fracture. This is known as the electroplastic effect. In this work, a novel setup to study the electroplastic effect during nanoindentation on individual phases and well-defined interfaces was developed. Using a eutectic Al-Al2Cu alloy as a model material, electroplastic nanoindentation results were directly compared with macroscopic electroplastic compression tests. The results of the micro- and macroscopic investigations reveal current induced displacement shifts and stress drops, respectively, with the first displacement shift/stress drop being higher than the subsequent ones. A higher current intensity, higher loading rate and larger pulsing interval all cause increased displacement shifts. This observation, in conjunction with the fact that the first displacement shift is highest, strongly indicates that de-pinning of dislocations from obstacles dominates the mechanical response, rather than solely thermal effects.
Investigation of the electroplastic effect using nanoindentation
Andre, D. (author) / Burlet, T. (author) / Körkemeyer, F. (author) / Gerstein, G. (author) / Gibson, J.S.K.-L. (author) / Sandlöbes-Haut, S. (author) / Korte-Kerzel, S. (author)
2019-01-01
Materials and Design 183 (2019)
Article (Journal)
Electronic Resource
English
Nanoindentation , Drops , Electric current pulse , Intermetallic composites , Electroplasticity , Metallic-intermetallic composites , Ternary alloys , Al-Cu alloys , Plastic deformation , Intermetallics , Compression testing , ddc:690 , Aluminum alloys , Electroplastic effect , Mechanical response , Binary alloys , Elongation to fracture , Glass ceramics , Deformation process , ddc:600 , Copper alloys
Investigation of the electroplastic effect using nanoindentation
| DataCite | 2019
Investigation of the electroplastic effect using optical and conventional techniques
| British Library Online Contents | 1995
Experimental investigation on electroplastic effect of DP980 advanced high strength steel
| British Library Online Contents | 2015
Computation method of metals flow stress for electroplastic effect
| British Library Online Contents | 2009