| The Effect of Surface Mechanical Attrition Treatment on Microstructure and Mechanical Properties of Pure Commercial Titanium |
| Paper ID : 1161-UFGNSM-FULL |
| Authors: |
|
mehrangiz rajabi toutkaboni * Unit No.14, No.3, Namayandegi Street, Azadi Avenue. |
| Abstract: |
| Severe plastic deformation methods stand among available procedures for grain ultra-refinement. Work hardening, microstructural changes and improvement of compressive residual stresses are caused by severe plastic deformations on surfaces. Consequently, grain size would fall to micro- and even nano-sacle ranges. In the present work, pure commercial titanium samples (50×28cm) with thickness of 1mm were subjected to surface mechanical attrition treatment (SMAT) for 0.5, 1, 1.5 and 2h. Microstructural analysis and microhardness testing were carried out on samples. Surface hardness of 0.5h, 1h, 1.5h and 2h samples were increased for 1.4, 1.8, 1.9 and 2 times, respectively. In addition, hardness increased moving from the depth towards the surface as grains became more refined. According to optical microscopy results, the thickness values of the deformed layer for 0.5h, 1h, 1.5h and 2h samples were 68, 142, 165, 175µm. It was observed that thickness of the deformed layer increased over time. Since particle size would not fall under a given extent, only the deformed layer thickness would increase after a given amount of time. The grain size of the sample SMATed for 2h was 45.9nm. |
| Keywords: |
| Pure commercial titanium, Surface mechanical attrition treatment, Mechanical properties, Deformed layer |
| Status : Paper Accepted (Poster Presentation) |
