Methodology to evaluate strength properties of steel by single instrumented indentation test
| Autor: | Guoyao Chen, Liyang Huang, Kaishu Guan, Jiru Zhong, Tong Xu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Instrumented indentation
Materials science business.industry Applied Mathematics Mechanical Engineering Particle swarm optimization 02 engineering and technology Structural engineering 021001 nanoscience & nanotechnology Test (assessment) 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Modeling and Simulation Ultimate tensile strength 0210 nano-technology business Inverse method |
| Zdroj: | The Journal of Strain Analysis for Engineering Design. 56:404-416 |
| ISSN: | 2041-3130 0309-3247 |
| DOI: | 10.1177/03093247211014761 |
| Popis: | The instrumented indentation test (IIT) is an attractive non-destructive testing technique. Determining accurate strength properties of steel using IIT is still challenging. In this paper, a new methodology is proposed to acquire the yield and ultimate tensile strength from a single IIT. This method extracts true stress-strain curves from IIT results. Acquired stress-strain curves indicate that the initial yield stress is not repeatable. This is caused by the inhomogeneous deformation of IIT specimens. Based on the obtained true stress-stain curves, corresponding yield strength, and ultimate tensile strength are calculated through theoretical derivation. The results show that the strength has a convergent tendency. On basis of this phenomenon, the strength is determined with an extrapolating method. Finally, the strength properties of Q345R are investigated to verify the reliability of this method. It is found that the strength determined from IIT and conventional tensile tests shows good agreement. The proposed method is effective in predicting strength properties from a single instrumented indentation test. |
| Databáze: | OpenAIRE |
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