diff --git a/src/materials/alloys/Alloy.py b/src/materials/alloys/Alloy.py
index 23726c14ece0eb4a20bf249637be4b0dff1b19a2..8b638106d9ec9b090857d2b6a0513d250ad89cc1 100644
--- a/src/materials/alloys/Alloy.py
+++ b/src/materials/alloys/Alloy.py
@@ -1,5 +1,5 @@
 import numpy as np
-from typing import List, Tuple, Union
+from typing import List, Tuple
 from dataclasses import dataclass, field
 from src.materials.elements import Element, Ti, Al, V
 from src.materials.elements import interpolate_atomic_number, interpolate_atomic_mass, interpolate_temperature_boil
@@ -123,4 +123,3 @@ if __name__ == '__main__':
 
     except Exception as e:
         print(f"An unexpected error occurred: {e}")
-
diff --git a/src/materials/alloys/SS316L/SS316L.py b/src/materials/alloys/SS316L/SS316L.py
index df963b13528362e1c72739af4ad5d180e8a592d1..c79a425595e1781b202dff9599d4c0b6afbb4e6a 100644
--- a/src/materials/alloys/SS316L/SS316L.py
+++ b/src/materials/alloys/SS316L/SS316L.py
@@ -116,4 +116,4 @@ if __name__ == '__main__':
     heat_capacity = 600  # Example value for testing
     thermal_diffusivity = thermal_diffusivity_by_heat_conductivity(
         heat_conductivity, density, heat_capacity)
-    print(f"Calculated thermal diffusivity: {thermal_diffusivity}")
\ No newline at end of file
+    print(f"Calculated thermal diffusivity: {thermal_diffusivity}")
diff --git a/src/materials/interpolators.py b/src/materials/interpolators.py
index 1a8b7341e26727a02e8a81eab79915f5b17e52f2..21b97788136949eccdd92a6b6b66440ed84d8072 100644
--- a/src/materials/interpolators.py
+++ b/src/materials/interpolators.py
@@ -226,18 +226,18 @@ if __name__ == '__main__':
     # Consistency Test
     print("\nConsistency Test between interpolate_lookup and interpolate_equidistant:")
     test_temps = [150.0, 200.0, 350.0, 450.0, 550.0, 650.0]
-    for T in test_temps:
-        lookup_result = interpolate_lookup(T, np.flip(np.array([600.0, 500.0, 400.0, 300.0, 200.0])),
+    for TT in test_temps:
+        lookup_result = interpolate_lookup(TT, np.flip(np.array([600.0, 500.0, 400.0, 300.0, 200.0])),
                                            np.array([10.0, 20.0, 30.0, 40.0, 50.0]))
-        equidistant_result = interpolate_equidistant(T, 200.0, 100.0, np.array([10.0, 20.0, 30.0, 40.0, 50.0]))
-        print(f"Temperature {T}:")
+        equidistant_result = interpolate_equidistant(TT, 200.0, 100.0, np.array([10.0, 20.0, 30.0, 40.0, 50.0]))
+        print(f"Temperature {TT}:")
         print(f"interpolate_lookup result: {lookup_result}")
         print(f"interpolate_equidistant result: {equidistant_result}")
 
         if isinstance(lookup_result, (int, float)) and isinstance(equidistant_result, (int, float)):
-            assert np.isclose(lookup_result, equidistant_result), f"Inconsistent results for T = {T}"
+            assert np.isclose(lookup_result, equidistant_result), f"Inconsistent results for T = {TT}"
         else:
-            print(f"Skipping comparison for symbolic or non-numeric result at T = {T}")
+            print(f"Skipping comparison for symbolic or non-numeric result at T = {TT}")
 
     symbolic_lookup_result = interpolate_lookup(Temp, density_temp_array1, density_v_array1)
     symbolic_equidistant_result = interpolate_equidistant(Temp, Temp_base, Temp_incr, density_v_array1)
diff --git a/src/materials/models.py b/src/materials/models.py
index 8a453662e1dbb8dab6d23ddce7825f13c531182f..cc1f1f088b2e9438f5ce29e39d7c5a9151661393 100644
--- a/src/materials/models.py
+++ b/src/materials/models.py
@@ -83,12 +83,12 @@ if __name__ == '__main__':
     # Test 5: Thermal diffusivity calculation with array values for heat conductivity
     k_a = np.linspace(30, 40, 3)
     print(f"Test 4a - Thermal diffusivity with array of heat conductivity: {thermal_diffusivity_by_heat_conductivity(k_a, rho, c_p)}")
-    # Expected output: Array of thermal diffusivities
+    # Expected output: Array of thermal diffusivity
 
     # Test 6: Thermal diffusivity with density calculated by thermal expansion
     calculated_densities = density_by_thermal_expansion(T_a, T_0, rho, tec)
     print(f"Test 4b - Thermal diffusivity with calculated densities: {thermal_diffusivity_by_heat_conductivity(k_a, calculated_densities, c_p)}")
-    # Expected output: Array of thermal diffusivities considering temperature-dependent density
+    # Expected output: Array of thermal diffusivity considering temperature-dependent density
 
     # Test 7: Symbolic computation for density with sympy Symbol temperature
     T_symbolic = sp.Symbol('T')