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Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy

DOI: 10.1016/j.actamat.2015.11.028 DOI Help

Authors: B. Cai (University of Manchester) , P. D. Lee (University of Manchester) , S. Karagadde (University of Manchester) , T. J. Marrow (University of Oxford) , T. Connolley (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acta Materialia , VOL 105 , PAGES 338 - 346

State: Published (Approved)
Published: February 2016
Diamond Proposal Number(s): 9018

Open Access Open Access

Abstract: Indentation is a well-established technique for measuring mechanical properties, such as hardness and creep, in solid materials at a continuum level. In this study, we performed indentation of a semi-solid granular alloy with an equiaxed dendritic microstructure. The resulting microstructural effects were quantified using a novel thermo-mechanical setup combined with 4D (three spatial dimensions plus time) synchrotron tomography and digital volume correlation. The experiments not only revealed the multitude of deformation mechanisms occurring at a microstructural level, (e.g. dilatancy, liquid flow, macrosegregation, shrinkage voids, and intra-granular deformation), but also allowed quantification of the evolution of the strain fields within the material. The resulting methodology is a powerful tool for assessing the evolution of localized deformation and hence material properties.

Journal Keywords: Granular materials, Semi-solid, Indentation, X-ray tomography, Digital volume correlation

Subject Areas: Materials, Engineering

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Other Facilities: Swiss Light Source