Effect of cold rolling on bonding tensile of 7075 alloy
The present study reports the effect of cold working on bending and tensile behavior of Brass, Copper, Aluminium. A series of experiments involving cold rolling (58% cold work) have been conducted for those three materials. The Vickers number of hardness for cold rolled specimens can be show very clearly that it has increasing up the number itself likewise the number of thickness reduction which also increasing. Which its number of Vickers can be rated as follow as Aluminium < Copper < Brass ; this means that Brass has the most tensile strength, Aluminium is easily to bend and Copper has the average all capable of these three. It has been shown that, Three materials before cold rolling exhibits excellent bend properties so that, it is capable of being bent cold around a pin under high angle without crack or fracture, due to ductile behavior. Also it can be seen that surface quality of starting materials is better than of cold rolled samples. To sum up, As Cold rolling is a metalworking process it increases the strength and hardness of metal, such as Brass , Copper and Aluminium in this experiment. A metal sheet or bar is passed through rollers at a controlled weight well under its recrystallization temperature, which is usually at room temperature. Although the cold rolling process increases the metal's strength and hardness it will also decrease its ductility, which will result in a metal that is more prone to cracks and fractures.
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