Abstract
Plastic deformation is the most common technique adopted to manufacture complex shape pieces in the most efficient way. Even higher requirements need to be faced in the different applications. In order to target such requirement quality and compliance tests are carried out aimed to guarantee that these standards are faced. This often means a waste of material and economic resources. A far as concerns welded stainless steel pipes many criticises affecting the general trend of subsequent machining need to be considered. Such critical issues are more evident in the case of ferritic stainless steel with respect to austenitic ones. Therefore, the study of operating and geometric parameters is fundamental in the production process of ferritic stainless-steel tubes, whose use is mainly for the automotive industry. The possibility to simulate by finite element method (FEM) allows to evaluate the effect of geometric parameters and process constraints on plastic deformation tubes capability, thus allowing to properly fit the plastic deformation process to the target shape as a function of the adopted steel.
Highlights
The high mechanical and corrosion resistance [1, 2] allows stainless steels to be used in a wide variety of fields like automotive [3, 5], aeronautical [6,7,8], food [9, 10], energy [11, 12], sintered [13, 14] and three-dimensional (3D) printing [15, 16]
The study of operating and geometric parameters is fundamental in the production process of ferritic stainless-steel tubes, whose use is mainly for the automotive industry
The possibility to simulate by finite element method (FEM) allows to evaluate the effect of geometric parameters and process constraints on plastic deformation tubes capability, allowing to properly fit the plastic deformation process to the target shape as a function of the adopted steel
Summary
The high mechanical and corrosion resistance [1, 2] allows stainless steels to be used in a wide variety of fields like automotive [3, 5], aeronautical [6,7,8], food [9, 10], energy [11, 12], sintered [13, 14] and three-dimensional (3D) printing [15, 16]. In automotive industry the forming process allow to produce very complex geometries, [17, 18] and up today several tests are carried out to validate the quality with the subsequent requirement of very high times and costs This is still of greater importance in aeronautical industry: in the last years, a lot of research papers have been published has been concerning materials for aeronautics [19,20,21]. The strong competition in the industrial aeronautic sector pushes towards the production of aircrafts with reduced operating costs, namely, extended service life, better fuel efficiency, increased payload and flight range From this perspective, the development of new materials and/or materials with improved characteristics is one of the key factors [26]. In this paper is used a commercial software package adopting Hill’s criterion to study the deformation process of ferritic stainless-steel tubes and the results are compared to those resulting from experimental test
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