Achieving grain refinement and strength enhancement of 2025 aluminum alloy by introducing a novel Al-TCB master alloy

被引：0
作者：
Liu, Zhan [1 ]
Nie, Jinfeng [1 ]
Chen, Yuyao [1 ]
Zhou, Kaixuan [1 ]
Zhang, Ruisheng [1 ]
Zhao, Yonghao [1 ,2 ]
Li, Chong [3 ]
Liu, Xiangfa [4 ]
机构：
[1] Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
[2] Hohai Univ, Sch Mat Sci & Engn, Changzhou 213200, Peoples R China
[3] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Intelligent Construct &, Tianjin 300354, Peoples R China
[4] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2025年 / 937卷
基金：
中国国家自然科学基金;
关键词：
Grain refinement; Nucleation mechanism; Microstructure evolution; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; TUBE PLATE; ZR; TI; MICROSTRUCTURE; BEHAVIOR; OPTIMIZATION; PERFORMANCE; EVOLUTION;
D O I：
10.1016/j.msea.2025.148467
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, the Al-TCB master alloy was incorporated into Zr-containing 2025 Al alloys through casting metallurgy. Subsequent hot extrusion and T6 heat treatment were employed to optimize the microstructure and improve the comprehensive mechanical properties. The results show that the average grain size of Zr-containing 2025 alloy was refined from 423 mu m to 96 mu m by adding 2 wt% of Al-TCB master alloy. The Al-TCB master alloy has a substantial anti Zr-poisoning effect. The B-doped TiC particles induced by the Al-TCB master alloy remained stable in the Al melt, serving as an effective heterogeneous nucleation substrate. After hot extrusion and T6 treatment, the ultimate tensile strength of the 2025-2 wt% Al-TCB alloy reaches 400.0 MPa and an elongation to failure of 20.0 %. The enhancement in mechanical properties is attributed to the effective grain refinement facilitated by the Al-TCB master alloy, which also suppressed coarse-grain structure formation during the aging process.
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页数：14
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