Radiation effect studies on partially crystalline bulk amorphous Fe-based metallic glass

The selection of appropriate materials for radiation environments is critical due to the harsh and aggressive conditions found in such environments, which are liable to degrade material properties. Therefore, durability of materials should be tested before being deployed. In this respect, proton tests are required for the materials to be used in the space environment because dominant galactic cosmic rays mostly comprised high energy protons. Bulk metallic glasses are candidate for space environment due to their desirable properties such as high strength, high corrosion resistance, and lack of grain boundaries. In this present study, we report the effect of a 30 MeV proton beam irradiation on the structural, thermal, mechanical, and magnetic properties of partially crystalline bulk amorphous Fe-based metallic glass. Defect size increment in positron annihilation lifetime spectroscopy and small intensity changes on the X-ray diffraction peaks of samples were observed after the irradiation that can be attributed to increasing free volumes. In addition, changes in crystallisation and glass transition temperatures were examined in differential scanning calorimetry. Furthermore, rise in coercivity which is a magnetic property was observed in vibrating sample magnetometer that may associate with the defect size increment. On the other hand, any changes were not observed on the microhardness measurements.


Radiation damage studies of bulk metallic glass materials under proton irradiation and radioprotection studies for METU-DBL
Uslu, Pelin; Akdeniz, M. Vedat.; Department of Metallurgical and Materials Engineering (2019)
Suitable material selection is critical for the sustainability of missions in radiation environments. Radiation tests are required for candidate materials before being used in these environments. While neutron and heavy ion tests are often performed on materials intended for the nuclear reactors, proton tests are necessary for space applications due to them being the dominant radiation. Generally, crystalline materials are used in radiation environments but, new material search is ongoing. One of such new g...
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Uslu, Pelin; Akdeniz, Mahmut Vedat; Mehrabov, Amdulla; Demirköz, Melahat Bilge (2019-10-07)
Materials should be radiation resistant for safe and reliable operation in radiation environments. Therefore, radiation tests are crucial for new candidate materials. Proton tests are critical for materials intended for use in nuclear reactors that produce hydrogen and hydrogen isotope ions and in the space environment that consists mostly of protons. Generally, crystalline materials are used in nuclear reactors and in space for their mechanical rob...
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Earth plasters have been used as a protective coating for buildings but, due to their low strength and low resistance to weather conditions, they have been abandoned for more resistant materials which in return lack vapour permeability. Earth plasters have usually a high moisture sorption rate, and their water vapour permeability is high, allowing the transfer of humidity through the material. These properties make them an interesting material for controlling vapour movement in humid rooms. Improving...
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The unique ability of grain boundaries to act as effective sinks for radiation damage plays a significant role in nanocrystalline materials due to their large interfacial area per unit volume. Leveraging this mechanism in the design of tungsten as a plasma-facing material provides a potential pathway for enhancing its radiation tolerance under fusion-relevant conditions. In this study, we explore the impact of defect microstructures on the mechanical behavior of helium ion implanted nanocrystalline tungsten...
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Corrosion is a material deterioration process due to chemical interactions with surrounding environment. Metallic components of amphibious vehicles are exposed to aggressive species such as chlorine in marine environment. These components must be coated or well protected to inhibit corrosion. Peeling and cracked paint on the surfaces of the vehicle hulls may result in undesired chemical interactions on damaged areas. Cathodic protection application with sacrificial anodes is an effective solution to corrosi...
Citation Formats
P. U. Kiceci, M. V. Akdeniz, M. B. Demirköz, and A. Mehrabov, “Radiation effect studies on partially crystalline bulk amorphous Fe-based metallic glass,” RADIATION EFFECTS AND DEFECTS IN SOLIDS, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96824.