Improving mechanical properties of ZK60 magnesium alloy by cryogenic treatment before hot extrusion
| Autor: | Cai-Nian Jing, Yun-Teng Liu, Meng Xiangbin, Ji-Xue Zhou, Lin-Lin Zhang, Lin Tao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Technology
Materials science Chemicals: Manufacture use etc 02 engineering and technology TP1-1185 mechanical properties 01 natural sciences 0103 physical sciences zk60 magnesium alloy General Materials Science Physical and Theoretical Chemistry 010302 applied physics Materials processing Chemical technology Metallurgy TP200-248 021001 nanoscience & nanotechnology Condensed Matter Physics extrusion Mechanics of Materials Cryogenic treatment Extrusion ZK60 magnesium alloy cryogenic treatment 0210 nano-technology |
| Zdroj: | High Temperature Materials and Processes, Vol 39, Iss 1, Pp 200-208 (2020) |
| ISSN: | 2191-0324 |
| Popis: | Few studies of cryogenic treatment were focused on nonferrous alloys, such as magnesium alloy. In this work, the effect of cryogenic treatment (77 K) before extrusion on microstructure and mechanical properties of ZK60 alloy was investigated. The results showed that many fine G.P. zones were formed during the cryogenic treatment and then grew to short fine {\beta }_{1}^{^{\prime} } precipitates when heating before extrusion. These precipitates pinned dynamic recrystallized grain boundaries in the subsequent extrusion, resulting in fine gains and dispersed spherical precipitates. By the cryogenic treatment before extrusion, the extruded ZK60 alloy showed good tensile strength and elongation balance. Especially, elongation was improved by 29%. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
http://www.degruyter.com/view/j/htmp.2020.39.issue-2020/htmp-2020-0054/htmp-2020-0054.xml?format=INT
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