Microstructural evolution and creep properties of Mg-4Sn alloys by addition of calcium up to 4 wt.%
| Autor: | Amir Baghani, Hamid Khalilpour, Seyed Mahdi Miresmaeili |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Metals and Alloys 02 engineering and technology 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure 01 natural sciences law.invention Shear modulus Stress (mechanics) Creep Optical microscope law Phase (matter) 0103 physical sciences Materials Chemistry Grain boundary Composite material 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 30:896-904 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(20)65263-3 |
| Popis: | The effects of addition of calcium up to 4 wt.% on the microstructure and creep properties of Mg-4Sn alloys were investigated by the impression creep test. Impression creep tests were performed in temperature range between 445 and 475 K under normalized stresses σ/G (where σ is the stress; G is the shear modulus) between 0.0225 and 0.035. Optical microscopy and scanning electron microscopy were used to study the microstructure of samples. It is observed that the addition of Ca more than 2 wt.% suppresses less stable MgSn2 phase, and instead forms more thermally stable phases of Ca-Mg-Sn and Mg2Ca at the grain boundaries which improve the creep resistance of Mg-4Sn alloys. According to the stress exponents (6.04 |
| Databáze: | OpenAIRE |
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