Microstructure evolution and properties of semi-solid Al80Mg5Li5Zn5Cu5 light weight high entropy alloy prepared by SIMA

IF 6.2 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
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Abstract

The semi-solid Al80Mg5Li5Zn5Cu5 light weight high entropy alloys were prepared by strain induced melting activation method (SIMA), and the microstructure evolution, mechanical properties and corrosion resistance of semi-solid Al80Mg5Li5Zn5Cu5 light weight high entropy alloys were investigated. The results indicate that the ideal globular or near-globular microstructures with an average grain size of 29.1 μm and a shape factor of 0.86 can be obtained when the Al80Mg5Li5Zn5Cu5 light weight high entropy alloys with 20% deformation held at 500 °C for 15 min. The coarsening coefficient is 35.8 μm3/s when the temperature is 500 °C, which is lower than the traditional single major element alloys due to the sluggish diffusion effect of high entropy alloys. The compression strength of semi-solid Al80Mg5Li5Zn5Cu5 light weight high entropy alloys is 558.4 MPa, which is 11% higher than that of as-cast state. The corrosion resistance of semi-solid Al80Mg5Li5Zn5Cu5 light weight high entropy alloys is also significantly improved.

SIMA 制备的半固态 Al80Mg5Li5Zn5Cu5 轻质高熵合金的显微组织演变和性能
采用应变诱导熔融活化法(SIMA)制备了半固态Al80Mg5Li5Zn5Cu5轻质高熵合金,研究了半固态Al80Mg5Li5Zn5Cu5轻质高熵合金的微观组织演变、力学性能和耐腐蚀性能。结果表明,当 Al80Mg5Li5Zn5Cu5 轻质高熵合金在 500 °C 下保持 20% 的变形量 15 分钟时,可获得平均晶粒尺寸为 29.1 μm、形状系数为 0.86 的理想球状或近球状微观结构。当温度为 500 ℃ 时,粗化系数为 35.8 μm3/s,由于高熵合金的缓慢扩散效应,粗化系数低于传统的单一主要元素合金。半固态 Al80Mg5Li5Zn5Cu5 轻质高熵合金的压缩强度为 558.4 MPa,比铸造状态的压缩强度高 11%。半固态 Al80Mg5Li5Zn5Cu5 轻质高熵合金的耐腐蚀性能也显著提高。
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来源期刊
Journal of Materials Research and Technology-Jmr&t
Journal of Materials Research and Technology-Jmr&t Materials Science-Metals and Alloys
CiteScore
8.80
自引率
9.40%
发文量
1877
审稿时长
35 days
期刊介绍: The Journal of Materials Research and Technology is a publication of ABM - Brazilian Metallurgical, Materials and Mining Association - and publishes four issues per year also with a free version online (www.jmrt.com.br). The journal provides an international medium for the publication of theoretical and experimental studies related to Metallurgy, Materials and Minerals research and technology. Appropriate submissions to the Journal of Materials Research and Technology should include scientific and/or engineering factors which affect processes and products in the Metallurgy, Materials and Mining areas.
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