Extracting local mechanical properties of steel bars by means of instrumented flat indentation |
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| Authors: | Alberto BoschettoFabrizio Quadrini Erica Anna Squeo |
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| Affiliation: | a Department of Mechanics and Aeronautics, University of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy
b Department of Mechanical Engineering, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy |
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| Abstract: | The evaluation of local mechanical properties of metal parts can be used for the prediction of forming and cutting forces during the following working stages. In order to show the feasibility of using indentation tests for work-piece characterization, C40 steel disks were cut from an extruded bar and machined by facing operation under different conditions. Indentation tests were carried out with 1 mm and 2 mm diameter indenters made of tungsten carbide; yield strength and indentation pressure values were extracted along the diameter of each disk. For the first time, indentation results were used to extract local mechanical properties of steel bars as a function of their process conditions: it was observed that small pins gave information on the effect of the machining process whereas large pins were more suitable to evaluate work-piece bulk properties. |
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| Keywords: | Flat indentation Steel Extruded bars Yield strength |
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