An experiment was conducted to investigate the thermal contact resistance (TCR) of similar and dissimilar materials under different operating conditions such as pressure and heat input. Results for Al-Al show that under pressure ranges of 1.5 bar to 6 bar and heat input ranges of 5W to 30W, thermal contact resistance decreases up to 43% for pressure and heat input ranges of 1.5 bar and 2 bar, respectively, and further decreases by 21% as pressure rises from 2 bar to 6 bar. For pressure and heat input ranges of 1.5 bar to 2 bar and 10W to 30W, respectively, the findings for Al-Cu show that the thermal contact resistance is lowered up to 43%, while when pressure rises from 2 bar to 6 bar, the percentage of thermal contact resistance further reduces by 21%. The results for aluminium-brass show that there is a reduction of up to 70% when heat input varies from 5 to 20 Watts under 1.5 bar to 3 bar of pressure. When pressure is increased from 3 bar to 6 bar and heat input is increased from 20 Watts to 30 Watts, there is a percentage change in thermal contact resistance up to 13%.

Thermal Contact Resistance, Directional Effect of Dissimilar Materials, Steady-state method, Aluminium, Copper, Brass