Indentation size effect when measuring Vickers hardness

Problem. An important aspect in the study of hardness using Vickers pyramid is to take into account indentation size effect. When measuring by method, applied load divided surface area impression. A significant factor influencing conformity measurement results The effect significantly affects measurements, changing their values 20-60%. widespread use tests explained a number advantages over other types mechanical tests. However, date there are problems determining metals and alloys, for example, it believed that constant, but practice depends on load. indenter material carried out each method with different loads. force loading properties material, prototype experimental factors. In turn, also indenter. This phenomenon called "indentation effect". Goal. purpose assess nature change increasing functional dependence depth insertion. Methodology. was conducted three metal samples according ISO 6507. Results.1. 12Х18Н10Т, МА21, БрО5Ц5С5 direct dimensional (indentation effect) obviously shown. indicates as increases during materials decreases significantly. 2. sample found from 29N 196N, 252HV29 / 10 200HV196 10- 21%. 3. MA21, 24N 128HV24 69HV196 10-47%. 4. БрО5Ц5С5, 19N 49N, 211HV19 85HV49 60%. 5. increase decrease test should be kept mind, especially when studying alloys micro- nanoranges. Originality. mathematical obtained, which demonstrates quantitatively shown various alloys. Practical value. application proposed will ensure more reliable qualitative assessment products.