具有高强度和延展性的新型轻质双相Al-Ti-Cr-Mn-V中熵合金的开发

Development of Novel Lightweight Dual-Phase Al-Ti-Cr-Mn-V Medium-Entropy Alloys with High Strength and Ductility.

作者信息

Liao Yu-Chin, Chen Po-Sung, Li Chao-Hsiu, Tsai Pei-Hua, Jang Jason S C, Hsieh Ker-Chang, Chen Chih-Yen, Lin Ping-Hung, Huang Jacob C, Wu Hsin-Jay, Lo Yu-Chieh, Huang Chang-Wei, Tsao I-Yu

机构信息

Department of Mechanical Engineering, National Central University, Taoyuan 320, Taiwan.

Institute of Material Science and Engineering, National Central University, Taoyuan 320, Taiwan.

出版信息

Entropy (Basel). 2020 Jan 6;22(1):74. doi: 10.3390/e22010074.

DOI:10.3390/e22010074

PMID:33285849

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7516508/

Abstract

A novel lightweight Al-Ti-Cr-Mn-V medium-entropy alloy (MEA) system was developed using a nonequiatiomic approach and alloys were produced through arc melting and drop casting. These alloys comprised a body-centered cubic (BCC) and face-centered cubic (FCC) dual phase with a density of approximately 4.5 g/cm. However, the fraction of the BCC phase and morphology of the FCC phase can be controlled by incorporating other elements. The results of compression tests indicated that these Al-Ti-Cr-Mn-V alloys exhibited a prominent compression strength (~~1940 MPa) and ductility (~~30%). Moreover, homogenized samples maintained a high compression strength of 1900 MPa and similar ductility (30%). Due to the high specific compressive strength (0.433 GPa·g/cm) and excellent combination of strength and ductility, the cast lightweight Al-Ti-Cr-Mn-V MEAs are a promising alloy system for application in transportation and energy industries.

摘要

采用非等原子方法开发了一种新型轻质Al-Ti-Cr-Mn-V中熵合金（MEA）体系，并通过电弧熔炼和滴铸法制备了合金。这些合金由体心立方（BCC）和面心立方（FCC）双相组成，密度约为4.5 g/cm³。然而，BCC相的比例和FCC相的形态可以通过加入其他元素来控制。压缩试验结果表明，这些Al-Ti-Cr-Mn-V合金表现出显著的抗压强度（约1940 MPa）和延展性（约30%）。此外，均匀化处理后的样品保持了1900 MPa的高抗压强度和相似的延展性（30%）。由于高比抗压强度（0.433 GPa·g/cm³）以及强度和延展性的优异结合，铸造轻质Al-Ti-Cr-Mn-V中熵合金是一种有前途的合金体系，可应用于交通运输和能源行业。