STUDY ON THE HOT FORGEABILITY OF FOUR MAGNESIUM ALLOYS

• Grant number: 16/15792-8
• Support Opportunities: Regular Research Grants
• Start date: November 01, 2016
• End date: October 31, 2017
• Field of knowledge: Engineering - Mechanical Engineering - Manufacturing Processes
• Principal Investigator: Sergio Tonini Button
• Grantee: Sergio Tonini Button
• Host Institution: Faculdade de Engenharia Mecânica (FEM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Because of the low density and good mechanical properties relative to other metal alloys, magnesium alloys have shown a steady increase in consumption accompanied by a significant drop in prices in the international market.These alloys have been increasingly used in place of other metal alloys for the production of components for aircraft and automotive industries.Despite these advantageous features, the hexagonal-close-packed structure of magnesium, and the resulting reduced number of sliding systems, makes the formability of these alloys limited to a narrow range of temperatures and strain rates.To increase the formability of many magnesium alloys, researches have been well-developed, primarily seeking to obtain raw materials with suitable microstructures composed of coarse grains, which allow large deformations without the occurrence of many defects normally associated with mechanical forming processes of these alloys.In a recent study developed in the Metal Forming Laboratory at UNICAMP, processing maps were built for four magnesium alloys available in the Brazilian market. These maps showed that these alloys can be hot formed, but the safe regions, where products are free of defects, are restricted to small ranges of temperature and strain rate, and that the main causes of poor workability are due to inadequate microstructure represented by coarse grains and particles. (AU)