A thermodynamic approach to the precipitation hardening of magnesium alloy with high formability. (15th March 2023)

• Record Type: Journal Article
• Authors: Lee, Jong-Kwan; Jang, Hyo-Sun; Zargaran, Alireza; Tapia, Antonio João Seco Ferreira; Kim, Nack Joon; Lee, Byeong-Joo
• Is Part Of: Scripta materialia. Number 226(2023)
• Publication Date: 2023-03-15
• Subjects: Magnesium alloys -- Alloy design -- Thermodynamics -- Mechanical properties -- Molecular Dynamics (MD); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.115231
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The poor formability of magnesium alloys at room temperature remains an obstacle to their wider application in industry. In a previous study, the present authors' group optimized the composition of a Mg-Zn-Ca alloy, achieving high ductility and formability, using an atomistic simulation, and the alloy showed high ductility and formability but low strength. Since magnesium alloy is a structural material, reasonable strength is required and precipitation hardening can be an effective way to improve strength. Important here is that the alloying added for precipitation hardening should not have a harmful effect on the carefully optimized ductility and formability. A thermodynamic calculation was performed to select the suitable alloying elements for precipitation hardening and to determine their optimum composition. This study suggests a new alloy design technique to improve strength without disturbing the well-optimized ductility and formability, together with experimental verification. Graphical Abstract: Image, graphical abstract