Achieving ultrahigh-specific strength and enhanced GFA in Ti-based bulk metallic glasses via a two-step alloying strategy

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Rare Metals Pub Date : 2024-11-13 DOI:10.1007/s12598-024-03036-6

Heng-Tong Bu, Jia-Lun Gu, Yun-Shuai Su, Yang Shao, Ke-Fu Yao

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Abstract

Ti-based bulk metallic glasses (BMGs) have attracted increasing attention due to their high specific strength. However, a fundamental conflict exists between the specific strength and glass-forming ability (GFA) of Ti-based BMGs, restricting their commercial applications significantly. In this study, this challenge was addressed by introducing a two-step alloying strategy to mitigate the remarkable density increment effect associated with heavy alloying elements required for enhancing the GFA. Consequently, through two-step alloying with Al and Fe in sequence, simultaneous enhancements in specific strength and GFA were achieved based on a Ti–Zr–Be ternary metallic glass, resulting in the development of a series of centimeter-sized metallic glasses exhibiting ultrahigh-specific strength. Notably, the newly developed (Ti₄₅Zr₂₀Be₃₁Al₄)₉₄Fe₆ alloy established a new record for the specific strength of Ti-based BMGs. Along with a critical diameter (D_c) of 10 mm, it offers the optimal scheme for balancing the specific strength and GFA of Ti-based BMGs. The present results further brighten the application prospects of Ti-based BMGs as lightweight materials.

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.