Reassessing spherical indentation: Contact regimes and mechanical property extractions

Abstract

Postprint (published version

A simple deterministic plastoelastohydrodynamic lubrication (PEHL) model in mixed lubrication

“…They formulated an equation to relate the change in the average pressure as a function of the ratio of combined elastic modulus to the yield strength. Indentation of spherical metallic surfaces was performed by Alcalá and Esqué-de los [65]. They found that the change in average pressure with deformation was similar to previous observations, in the absence of hardening or pileup.…”

High throughput exploration of process-property linkages in Al-6061 using instrumented spherical microindentation and microstructurally graded samples

“…Literature reports a value of around 2.8 for the indentation constraint factor defined as the ratio of hardness or mean pressure to uniaxial flow stress [1,3,5,24,[44][45][46][47][48][49][50][51][52]. These studies are primarily inspired by Tabor's initial experiments conducted on copper and steel for which he identified a ratio of 2.8.…”

Mechanical characterization of highly porous inorganic solids materials by instrumented micro-indentation

“…Indentation tests are mainly carried out using sharp indenters, such as Berkovich or Vickers tips. Tests using a spherical tip have also been described in the literature, although they are less common [3,7,8]. This specific test, in contrast to sharp tip indentation, may be used to characterize the elasto-plastic transition as the contact stresses increase with penetration depth.…”