TY - JOUR T1 - Using the ratio: maximum load over unload stiffness squared, Pm/Su², on the evaluation of machine stiffness and area function of blunt indenters on depth-sensing indentation equipment JO - Materials Research A1 - Meza, Juan Manuel A1 - Farias, María Cristina Moré A1 - Souza, Roberto Martinz de A1 - Riaño, Luis Javier Cruz SN - 1516-1439 UL - 10.1590/S1516-14392007000400019 VL - 10 Y1 - 2007 PB - Brasil ER -