Evaluation of Elastic, Mechanical, and Thermophysical Properties of Nanostructured Aluminides for Aviation Industries

Intermetallic-based alloys due to their unique material properties are considered as most suitable modern engineering materials. The present study depicts the elastic, mechanical, and thermophysical properties of aluminides at nanoscale using ultrasonics non-destructive evaluation (NDE) technique. Ultrasonic method is one of the popular methods used widely to characterize the microstructural properties at bulk as well as nanoscale. To evaluate ultrasonic and thermophysical properties, the second-order elastic constants (SOECs) obtained via application of using the Coulomb–Born–Mayer interaction potential for the chosen material. The mechanical parameters have also been evaluated based on obtained SOECs. It is found that Young’s modulus for nanostructured aluminides matches with the reported range of 180–281 GPa. The better ductile behavior of nanostructured NiAl in comparison with nanostructured FeAl is confirmed by Pugh ratio. The ultrasonic velocity has been further utilized to find out the lattice thermal conductivity. All the computed parameters have been utilized to find out the thermal relaxation time, Debye temperature, and acoustic coupling constants for nanostructured aluminides. The ultrasonic theoretical model with well-established relations has been utilized to characterize the nanostructured aluminides. MATLAB as a simulation tool has been utilized to obtain the material characteristics.