Effect of Cryogenic Treatment Prior to Rolling on Microstructure and Mechanical Properties of AZ31 Magnesium Alloy
| Autor: | Huang Zhiquan, Huang Qingxue, Ma Lifeng, Yue Zhaohan, Wei Jianchun, Gao Xiangyu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Toughness Materials science General Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Grain size Brittleness 0103 physical sciences Fracture (geology) Cryogenic treatment Magnesium alloy Composite material 0210 nano-technology Ductility |
| Zdroj: | Rare Metal Materials and Engineering. 47:2942-2948 |
| ISSN: | 1875-5372 |
| DOI: | 10.1016/s1875-5372(18)30215-7 |
| Popis: | The effects of cryogenic treatment prior to hot rolling on the strength, toughness and ductility of as-cast AZ31 magnesium alloy plates were investigated. The cryogenic treatment conditions were −60 °C/12 h, −120 °C/12 h, −180 °C/12 h, −60 °C/2 h, and −180 °C/2 h. Experimental results show that appropriate cryogenic treatment conditions can significantly refine the grain size and the improve strength, toughness and ductility. A large number of twins appear in both kinds of samples cryogenically treated for 2 h. The sample experienced cryogenic treatment for 12 h at −60 °C followed by rolling process shows the finest and most uniform and increase in yield strength by 25.8%. Meanwhile, a four-time increase in extension rate (3.06% to 12.31%) is attains. The tensile fracture present a mixed-mode fracture, which is characteristic of brittle and ductile fracture mechanisms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|