In-situ observation of solidification process in β-solidifying γ-TiAl-based alloy

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-10-30 DOI:10.1016/j.matlet.2024.137638

Zhiping Li , Mengjia Yao , Tao He , Xianghong Liu , Binqiang Li , Liangshun Luo , Yanqing Su

引用次数: 0

Abstract

The solidification process of Ti-40Al alloy, a representative β-solidifying γ-TiAl-based alloy, is investigated in-situ using high-temperature laser scanning confocal microscopy (HTLSCM). During the heating process, Ti-40Al alloy exhibits a complete β phase microstructure; however, peritectic α phase is observed during solidification. The occurrence of peritectic α phase is discussed and attributed to the segregation of Al under certain solidification conditions. This finding is further confirmed in the directional solidification of another β-solidifying γ-TiAl-based alloy, TNM alloy, and it provides valuable guidance for controlling the microstructure of β-solidifying γ-TiAl-based alloys.

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原位观测β凝固γ-TiAl基合金的凝固过程

采用高温激光扫描共聚焦显微镜（HTLSCM）对具有代表性的β凝固γ-TiAl基合金--Ti-40Al合金的凝固过程进行了原位研究。在加热过程中，Ti-40Al 合金呈现出完整的 β 相微观结构；然而，在凝固过程中观察到了包晶 α 相。对包晶 α 相的出现进行了讨论，并将其归因于特定凝固条件下的铝偏析。这一发现在另一种β凝固γ-TiAl基合金TNM合金的定向凝固中得到了进一步证实，并为控制β凝固γ-TiAl基合金的微观结构提供了有价值的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive