Structure and Properties of the Powder for Additive Synthesis of Alloys Based on Titanium Aluminide TiAl

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2024-09-23 DOI:10.1007/s11041-024-01030-4

A. G. Illarionov, M. S. Karabanalov, M. A. Shabanov, S. I. Stepanov, P. Soundappan, K. H. Thulasi Raman, S. Suwas

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Abstract

Electrode-induction gas atomization (EIGA) is a promising and cost-effective method for producing spherical intermetallic titanium powders used in additive manufacturing. The present study investigates the morphology, microstructure, chemical and phase compositions, nanoindentation properties of a commercial pre-alloyed TiAl-based EIGA alloy powder. The Ti – 48Al – 2Cr – 2Nb powder is characterized by a spherical shape and dendritic structure with the dendrites enriched with Nb and the interdendritic areas enriched with aluminum and chromium. The temperature ranges of the phase transformations in the powder with precipitation/dissolution of phases α₂ , α, γ, B2, (TiNb)Cr₂ are determined using thermal analysis during heating and cooling in an inert atmosphere of argon at a rate of 50 K/min. Development of an oxidation process at the temperatures above 500°C and significant increase in its rate at the temperatures above 900°C is detected.

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用于添加剂合成基于钛铝合金的粉末的结构和性能

电极感应气体雾化（EIGA）是生产球形金属间钛粉末的一种有前途且经济有效的方法，可用于增材制造。本研究调查了商用预合金化 TiAl 基 EIGA 合金粉末的形态、微观结构、化学成分和相组成以及纳米压痕特性。Ti - 48Al - 2Cr - 2Nb 粉末具有球形和树枝状结构，树枝状结构中富含 Nb，树枝状结构间区域富含铝和铬。在氩气惰性气氛中以 50 K/min 的速度加热和冷却时，通过热分析测定了粉末中α2、α、γ、B2、(TiNb)Cr2 相沉淀/溶解的相变温度范围。在温度高于 500°C 时，检测到氧化过程的发展，而在温度高于 900°C 时，氧化过程的速率显著增加。

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来源期刊

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.