Surface morphology and phase stability of titanium irradiated with 168 MeV 136Xe ions
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Mariusz Kaminski
Abstract
A titanium sample was irradiated with Xe 168 MeV energy at fluences of 1 × 1014, 2.2 × 1014, and 5 × 1014 ions · m−2. Changes induced by the ions with irradiation were analysed with an atomic force microscope, scanning electron microscope, and X-ray diffractometer. The irradiation at a fluence of 1 × 1014 ions · cm−2 leads to formation of hillocks with a density of 9 × 106 hillocks · cm−2. An increase in the fluence value results in disappearance of the hillocks and formation of void–dislocation lines. The changes in the surface topography are accompanied by a change in the relative content of the hcp (α) and fcc phases. The substantial changes in the crystalline structure (increased content of the fcc phase, reduction of lattice constants, changes in stresses) resulted from irradiation at a fluence of 1 × 1014 ions · cm−2. Irradiation of massive titanium samples with xenon ions at a fluence of 168 MeV 1 × 1014 ions · cm−2 at room temperature leads to a transition of ∼10% of the hexagonally closed-packed phase – hcp (α) into a face centred cubic structure (the fcc phase). Higher Xe ion fluences contribute to further reduction of lattice constants and crystallite sizes as well as reduction of the phase fcc content and lower values of stresses. It has been found for the first time that irradiation at higher fluences leads to partial recovery of the hcp (α) phase. Irradiation changes the texture of∼50% of the fcc phase crystallites.
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Articles in the same Issue
- Contents
- Contents
- Original Contributions
- Dynamic fragmentation and spheroidization of α phase grains during hot deformation of Ti-6Al-4V alloy
- Formation and characterization of hot tearing in AZ series alloys
- The effect of quench-aging on the mechanical properties of Zn-27Al-1Cu alloy
- Microstructural and mechanical properties of novel β-type Ti–Nb–Ni alloys containing a second phase
- Microstructure evolution mechanisms of undercooled Ni80Cu20 alloys
- Microstructures and tensile properties of CuZrAlNb metallic glass composites under different cooling rates
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- Ultrathin SnO2 nanorod/reduced graphene oxide nanosheet composites for electrochemical supercapacitor applications with excellent cyclic stability
- Combustion synthesis and formation mechanism of silver nanoparticles
- Phase relationship of the Ag–Zr–Cr system at 1000 and 750°C
- Thermal properties of carbonized composite materials based on carbon filled elastomeric matrices
- Short Communications
- Surface morphology and phase stability of titanium irradiated with 168 MeV 136Xe ions
- DGM News
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