Chapter eight - Evaluation and characterization of rolling of brass at cryogenic conditions

Abstract

Brass is one of the most widely used alloy of copper in everyday life. It is valued high in the pool of materials because of its workability, hardness, corrosion resistance, and attractive appearance. The properties of brass can be varied with changes in the copper–zinc ratio. Brass as an alloy can be used extensively used at temperatures below zero because of its tendency of retaining ductile strength even when the temperatures are reduced below zero. The present study is focused on the mechanical properties such as ultimate tensile strength (UTS), yield strength (YS), and percentage elongation (%EL) are evaluated based on the experimental data obtained from the uniaxial isothermal tensile tests performed at an interval of −250°C varying from 0°C to −500°C on specimens cut at 0, 45, and 90 degree orientations with respect to rolling direction and subjected to different crosshead velocity varying from 3 to 7mm/min at intervals of 2mm/min. A total of 27 experiments have been planned based on design of experiments to conduct experiments. A mathematical model was also established to predict the mechanical properties with respect to variations of temperature, orientation, and crosshead velocities simultaneously. A confirmation test was also conducted in order to verify the correctness of the model developed. Results have shown that mechanical properties were predicted with a reasonable accuracy for variation of process parameters within the range specified in the study.