Micromechanical Study of the Forged Ti-1023 Titanium Alloy by Micro-Indentation

Jiang Li; Fu Guo Li; Xin Kai Ma; Ming Jie Zhang; Zhan Wei Yuan

doi:10.4028/www.scientific.net/KEM.765.160

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Micromechanical Study of the Forged Ti-1023 Titanium Alloy by Micro-Indentation
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Micromechanical Study of the Forged Ti-1023 Titanium Alloy by Micro-Indentation

Abstract:

In order to study the micromechanical behaviour of the forged Ti-1023 titanium alloy, micro-indentation experiments of the forged Ti-1023 titanium alloy were performed with various maximum indentation loads from 500 mN to 4000 mN and various loading speeds from 5.06 mN/s to 51.85 mN/s. Using the experimental data, the non-destructive instrumental approach was applied to indicate the mechanical properties just like the Young’s modulus E, microhardness H, initial yield stress σ_y and strain hardening exponent n using the P-h curves from the tests. The result showed that the value of the indentation Young’s modulus basically remain unchanged in the range from 110 GPa to 150 GPa and H decreased with the increase of the load, the micro-indentaion plasticity constitutive equations were obtained by using Hookean elastic and power-law plastic stress-strain equations.