DETERMINING THE TRUE STRESS-STRAIN RELATIONSHIP BY DEPTH SENSING INDENTATION ON TWO STRUCTURAL MATERIALS

作者：Gavendova Petra^*; Zubko Pavol; Pesek Ladislav; Blahova Olga

来源：Chemicke Listy, 2010, 104: S310-S313.

• Depth Sensing Indentation
• spherical indentation
• stress-strain curve

The aim of this paper is the determination of the true stress - true strain, sigma - epsilon, curves by depth sensing indentation (DSI) on both aluminium (AA6063) and steel (St 52) using a spherical indentation. Hardness, H, indentation modulus, E', and a part of the indentation stress-strain, sigma - epsilon, curve were determined using a spherical indenter with 600 mu m diameter using a NanoIndenter XP with CSM technique. Yield strength was defined as R(p0,2) for DSI. Uniaxial tensile test were performed for comparison of both techniques. The stress - strain curves obtained on basis of DSI technique agree within 10% accuracy with the values obtained from tensile tests. The deviations were attributed the unaccounted pile-up effects.

• 出版日期2010