Effect of annealing temperature on the microstructure and mechanical properties of Al15Ti35V20Nb15Zr15 alloy

IF 4.2 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-03-14 DOI:10.1016/j.ijrmhm.2025.107154

Yatao Zhu , Chenglei Wang , Manchao Liang , Zhantao Wang , Mei Huang , WeiJie Liu

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Abstract

In this study, the effects of annealing temperature on the microstructure and mechanical properties of Al₁₅Ti₃₅V₂₀Nb₁₅Zr₁₅ lightweight high-entropy alloy were systematically investigated. Results indicate that the Al₁₅Ti₃₅V₂₀Nb₁₅Zr₁₅ alloy exhibits a dual-phase structure consisting of body-centered cubic (BCC) and hexagonal close-packed (HCP) phases. As the annealing temperature increases, the HCP phase grows along the grain boundaries, accompanied with the precipitation of a needle-like phase. The alloy primarily demonstrates a dendritic structure, and the rise in annealing temperature promotes dendrite refinement, reducing the grain size from approximately 227.21 μm to 88.28 μm. This refinement remarkably enhances the alloy's strength, hardness, and wear resistance. The yield strength of the alloy increases from ∼1718 MPa to ∼1941 MPa with the increase of annealing temperature. However, this enhancement partially affects plasticity primarily because of the precipitation of acicular phases, which hinders dislocation motion and the increase in internal stress within the alloy, thereby leading to reduced ductility.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.