Drawability Studies of Magnesium Alloy Sheets at Elevated Temperature / Badania Tłoczności Blach Ze Stopów Magnezu W Podwyższonej Temperaturze

Abstract

The paper presents the results of a study of drawability of thin AZ31 magnesium alloy metal sheets. These studies are a continuation of experiences in presenting the characteristics of technological plasticity of strips made of magnesium alloy which have been cast between rolls in vertical and horizontal systems called ‘twin-roll casting’. In the context of previous experiments conducted at the Institute of Material Technology of the Silesian University of Technology in cooperation with the Technical University - Bergakademie Freiberg (Germany), drawability of these strips at elevated temperatures has been comprehensively defined while using forming limit curves. Due to low formability of magnesium alloys at ambient temperature, formability tests - including cup forming tests presented in this paper - have been carried out in heated dies at temperature range of 200°C to 350°C. A modern AutoGrid digital local strain analyzer has been used in the examinations and the method of image analysis of deformed coordination nets has been applied. Quantitative and qualitative impact of deformation temperature upon the drawability effects of AZ31 magnesium alloys products have been evaluated.

Method of Stamping the Progression of a Beverage End Rivet of a Thinner Sheet of AW-5182 Alloy

“…One of the most common problems encountered during the stamping process is a break in the material structure of the sheet metal due to stalling. This results in a crack or too much material thinning, so that so-called micro leaks can occur [ 26 , 30 , 36 , 37 , 38 ]. To avoid this, it is important to choose the edges of the right parameters for the punch and die, as shown in the work [ 34 ] when shaping rectangular ribs in a heat exchanger.…”

“…The stamping process involves giving a specific profile to a component through the use of shaping tools such as a die and a punch [16,[24][25][26][27]. Stamping can be carried out using cold or hot methods [4].…”