Changes in the thermoelectric power of a Ni base superalloy induced by elastic and plastic strain

Grit blasting is a low cost surface modification treatment widely used to enhance mechanical fixation of implants through increasing their roughness. As a result of the severe surface plastic deformation, beneath the surface it produces additional effects such as grain size refinement, work hardening and compressive residual stresses, which are generally evaluated with destructive techniques. In this research work, the blasting induced effects by Al 2 O 3 and ZrO 2 particles and their evolution after annealing at 700ºC were evaluated in 316LVM (Low Vacuum Melting) stainless steel specimens using two non-destructive thermoelectric techniques (NDTT), the non-contacting and contacting thermoelectric power measurements. Microstructural analysis and microhardness measurements performed beneath the blasted surface reveals that the non-contact NDTT results correlate well with the reversion of the α'-martensite developed during blasting, whereas the contact NDTT results are closely related to the grain size refinement and work hardening and the expected evolution of compressive residual stresses. Potential of these techniques to monitor subsurface changes in blasting processes and others severe surface plastic deformation techniques are clearly envisaged.

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Changes in the thermoelectric power of a Ni base superalloy induced by elastic and plastic strain

Cited by 3 publications

References 17 publications

Application of fractional calculus to modeling the dynamic mechanical analysis of a NiTi SMA ribbon

Application of fractional calculus to modeling the dynamic mechanical analysis of a NiTi SMA ribbon

The Strengthening Role of Cryogenic Treatment in the Mechanical Properties and Abrasive Wear of Low Alloy Wear-Resistant Steel

Assessment of blasting induced effects on medical 316 LVM stainless steel by contacting and non-contacting thermoelectric power techniques

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