TY - JOUR
T1 - Time-resolved synchrotron tomographic quantification of deformation during indentation of an equiaxed semi-solid granular alloy
AU - Cai, B.
AU - Lee, P.d.
AU - Karagadde, S.
AU - Marrow, T.j.
AU - Connolley, T.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - 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.
AB - 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.
U2 - 10.1016/j.actamat.2015.11.028
DO - 10.1016/j.actamat.2015.11.028
M3 - Article
SN - 1359-6454
VL - 105
SP - 338
EP - 346
JO - Acta Materialia
JF - Acta Materialia
ER -