The methods of sever plastic’s deformation in order to fine-graining matter’s structure for improvement of mechanical properties in metals

Subject Areas : Solid Mechanics

سید حسن سجادی ¹ , بهروز مهدی خوانی ² , علی پیروی ³

1 - Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran
2 - Department of Mechanical Engineering, Parand Branch, Islamic Azad University, Parand, Iran
3 - Department of Mechanical Engineering, Saveh Branch, Islamic Azad University, Saveh, Iran

Received: 2017-04-22 Accepted : 2017-12-24 Published : 2017-01-01

Keywords: Severe Plastic Deformation, NANO-structured Material, Super Metals,

Abstract :

Increasing material’s strength has been a significant matter since the beginning of engineering to up to now. It has always been paid attention by engineers. A variety of methods has been presented for increasing strength, stability, working range and material working life by development of engineering sciences and more identification on material properties and the material behavior, which are surrounded by some rules. Majority of these methods accompany disadvantages and restrictions, therefore, the studies in this field for modification of methods continue. One of the newest methods for this reason is the Sever Plastics Deformation Method (SPD). This method is based on creation of NANO materials increases some desirable properties such as strength, stability, resistance against corrosion and abrasion properties. Also, it prevents the reduction of other material properties like ductility, which is known an inevitable and undesirable process in majority of older strength’s methods and even is caused to increase it. Increasing of desired properties of metals, which were under this process, is very significant, so that the products of this process are named Super Metals. In this research, mean while checking relations among the automatic lattice structure of matter with its mechanical properties somehow it has been mentioned to common method of SPD