Research into Plastic Deformation of Double Reduced Sheets

Abstract

This contribution focuses on examining properties of thin steel sheets, which have been used to produce packages. Thin steel sheets for producing packages have been created with a different method (considering their thickness) than other thin steel sheets, such as sheets for the automobile industry. Steel sheets thinner than circa 0.18 mm are produced with a simple rolling and followed by annealing. Annealing can be completed through a batch process or a continuous process. Steel sheets with a thickness less than 0.13 mm are produced using a second reduction. Taking into account the considerably different strength and plastic properties of the sheets produced with simple rolling and the sheets produced with a second reduction, two types of materials are evaluated and analyzed in this contribution. Examined materials have been produced with different methods: The first material was continuously annealed after being rolled; the second was deformed using a second reduction without any subsequent annealing. Both used materials possess different final properties. The research focused on evaluation of the strength and plastic properties of the packaging sheets during various stress-strain states (uniaxial tensile test and biaxial tensile test-bulge test). The analysis also focused on the factors that led to a lack of inhomogeneity in the plastic deformation, mainly during the uniaxial tensile test causing the localization of the plastic deformation.

The Impact of Annealing Process on the Mechanical Properties of TS550BA and TH550CA Steel Sheets

“…The effectiveness of the integrated model was demonstrated by achieving a 9% productivity enhancement in a modern batch annealing operation when compared to the prevalent thermal model. [14] Spišák et al [16] in their work characterized in detail the causes and consequences of loss of stability and fractures of steel packaging sheets in uniaxial and biaxial tensile loading. The analysis of deformation and loss of stability for individual tests were discussed.…”

Study on the Properties of a 2219 Aluminum Alloy Friction Stir-Welded Joint under the Biaxial Stress State

“…Therefore, the accurate characterization of the mechanical properties of aluminum alloy FSW under a biaxial stress state need to be conducted. For the design of such struc tures, design allowable values are usually used as representative for considering failure behaviors and determined using careful tests [11][12][13].…”

Surface roughness of AISI 1010 and AISI 304 of PEMFC bipolar plates with microscale hydroformed capillary channels

“…The inhomogeneity of the surface deformation for most metal alloys under plastic deformation processes might provide sites of strain localization. 29…”