TY - BOOK AU - Riham Mohammad Samir Hegazy AU - Ali Elsayed Abuelezz , AU - Mahmoud Ghareeb Elsherbiny , AU - Mohy Saad Mansour , TI - Effect of geometrical and dimensional tolerances of hardness indenters on the uncertainty and accuracy of hardness meaurements / PY - 2011/// CY - Cairo : PB - Riham Mohammad Samir Hegazy , KW - Brinell hardness KW - Uncertainty KW - Vickers hardness N1 - Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Mechanical Design and Production; Issued also as CD N2 - Hardness is a measure of a material's resistance to local deformation caused by an indentation from a hard body . Measurement of hardness on materials is one of the most useful mechanical tests for understanding the surface properties of these materials . Hardness is quite often used in the field of Tribology as the sensitive criteria for judging wear of metals and alloys ER -