Calcium-Bearing Mg-RE Alloy Composition for Room-Temperature Formability
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Solution Overview
Problem
Magnesium alloys exhibit poor room temperature formability due to their hexagonal close packed structure and limited slip planes, which restricts their application, and existing advanced processing methods like ECAP and DSR have low production efficiency compared to conventional rolling.
Innovation Solution
Calcium-bearing magnesium and rare earth element alloys with specific compositions (Zn, Al, Ca, Gd, Y, Mn) are developed, combined with conventional rolling, extrusion, and isothermal forging processes to enhance formability, mechanical properties, and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional rolling method is used, then production efficiency is high, but room temperature formability is poor
Solution Approach 1:
The patent changes the chemical composition parameters of the magnesium alloy by adding specific amounts of Ca (0.1-0.4%), Gd (0.1-0.4%), and other elements to AZ31 base alloy. This compositional parameter change enables the alloy to achieve good room temperature formability through conventional rolling without requiring advanced processing methods, thus resolving the contradiction between production efficiency and formability.
2Reliability
If advanced processing methods (ECAP, CR, ARB, DSR) are used, then room temperature formability is improved, but production efficiency is reduced
Solution Approach 1:
The patent modifies the chemical composition parameters of the magnesium alloy by adding Ca, Gd, and other elements to the AZ31 base alloy. This compositional change enables the material to achieve good room temperature formability through conventional rolling processes, avoiding the need for complex advanced processing methods like ECAP or DSR, thereby maintaining high production efficiency while improving formability.
3Reliability
If magnesium alloy composition is optimized with Ca and rare earth elements, then formability and mechanical properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes the chemical composition parameters by adding specific amounts of Ca (0.1-0.4%), Gd (0.1-0.4%), and other elements to the magnesium alloy. These compositional changes improve formability and mechanical properties while maintaining compatibility with conventional rolling and heat treatment processes, avoiding significant increases in manufacturing complexity.
Data Source
AI summary
A calcium-bearing magnesium and rare earth element alloy consists essentially of, in mass percent, zinc (Zn): 1-3%; aluminum (Al): 1-3%; calcium (Ca): 0.1-0.4%; gadolinium (Gd): 0.1-0.4%; yttrium (Y): 0-0.4%; manganese (Mn): 0-0.2%; and balance magnesium (Mg).