Determination of hardness and elastic modulus inverse pole figures of a polycrystalline commercially pure titanium by coupling nanoindentation and EBSD techniques

Abstract

International audienceno abstrac

Nanomechanical analysis of AZ31 magnesium alloy and pure magnesium correlated with crystallographic orientation

“…The nanohardness dependence for pure Mg agrees well with [5], where the experimental values that were measured by displacement-controlled nanoindentation remain constant or marginally increase at Φ < 30°, decrease by approximately 30 % within 30° < Φ < 55°, and are rather constant again for Φ > 55°. It is worth noting that the decrease in nanohardness with increasing Φ was also reported for tungsten carbide [21] and titanium [22][23][24], despite the different values of the c/a axial ratio, which partly determines the preferred deformation mechanisms. Due to the lack of grains with a suitable size and Φ < 27° for pure Mg and Φ < 10° for AZ31, it was not technically feasible to measure the nanohardness evolution for smaller Φ.…”

“…Due to the lack of grains with a suitable size and Φ < 27° for pure Mg and Φ < 10° for AZ31, it was not technically feasible to measure the nanohardness evolution for smaller Φ. Nevertheless, based on the existing studies, the nanohardness is expected either to continue rising with decreasing Φ [21][22][23][24] or to remain nearly constant [5].…”

High Throughput Assays for Additively Manufactured Ti-Ni Alloys Based on Compositional Gradients and Spherical Indentation

“…6 The representative mechanical response and SE-BSE micrographs from spherical nanoindentation tests composition, distribution of grain orientations [7,61], and the phase volume fraction [62,63]. Using the shear and bulk modulus values estimated previously by Toprek et al [64], one might expect the elastic modulus of Ti 2 Ni to be approximately 149 GPa.…”

Mechanism of saturated flow stress during hot tensile deformation of a TA15 Ti alloy

“…The post-analysis by employing the SEM and EBSD can clearly identify the position and orientation of α grains which are indented as shown in Fig.8 (a)-(c). Since the nanohardness of the α phase is orientation dependent [26], the evolution of the nanohardenss of the α phase with respect to strain is discussed based on the same orientation. The typical load-displacement (P-h) curves for indentation on α phase with orientation of <0001> and <20> are shown in Fig.8 (d).…”