Skip to main content
Article thumbnail
Location of Repository

Peak Load in Rapid Compression Tests: Experiments and Micromechanical Modelling

By Véronique Favier and Helen V. Atkinson


This paper was presented at the 12th International ESAFORM Conference on Material Forming, Twente, The Netherlands, April 27-29 2009, and published in the Proceedings.Rapid compression tests are useful to characterize the semisolid behaviour in thixoforming conditions. The load-displacement curves typically display a peak load. The origin, the maximum value and the height of this peak are discussed comparing calculated results obtained using a micro-macro model and experimental data obtained in earlier work. As suggested by experiments, the calculated peak load originates from a 3D continuous solid skeleton, which breaks down under load. For the same initial semisolid structure, the model predicts that decreasing the ram speed decreases the maximum of the peak because of a strain rate effect. In addition, the peak load is found to be quite sensitive to initial internal structure, namely the volume fraction of entrapped liquid, which may change for various soaking times. Finally, the time for the solid skeleton breakdown is found to be in good agreement with experimental results

Topics: Semisolids, Compression tests, Microstructure, Transient behaviour, Micromechanics
Publisher: ESAFORM (European Scientific Association For Material Forming)
Year: 2009
OAI identifier:

Suggested articles


  1. (2003). Hogg S.C.: Rapid compression of aluminium alloys and its relationship to thixoformability. Metallurgical and Materials Transactions A. doi
  2. (2001). Investigation into the rapid compression of semi-solid alloy slugs. doi
  3. (2004). Micro-macro modeling of the isothermal steady-State behaviour of semi-Solids. doi
  4. (2005). Modelling the semisolid processing of metallic alloys. doi
  5. (2009). Transient semi-solid behaviour: modelling step-change up and step-change down in shear rate using a micromechanical approach. In: doi
  6. XRay microtomography investigation of the effect of Ba additions on the microstructure of partially remelted Al4%Cu alloys. Solid State Phenomena.141-143:475-480, doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.