“…8. 25 Sharma et al [85], Hv, quenched Schenk and Fissel [86], Hv, quenched Schenk and Fissel [86], Hv, THM Schenk and Fissel [86], Hv, Bridgeman Triboulet et al [87], Hv, THM Barbot et al [88], Hv, THM Fissel and Schenk [96], Hv, THM Cole et al [89], Hv, Bridgeman Andrews et al [90], which may be related to the dependence of hardness on loading velocity and/or loading time [75,96], or significant amounts of creep [80]. In addition, Martyniuk et al [80] have shown that the measured MCT hardness increases with decreasing indentation depth, an effect that is expected to be especially pronounced for soft crystalline materials [97], and that could also contribute to the degree of scatter.…”