Effect of aging on the ball milling of high-strength Ti2AlNb-based alloy

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-06-06 DOI:10.1016/j.vacuum.2025.114485

K.S. Senkevich

引用次数: 0

Abstract

This work puts forward a promising approach to the milling of high-strength Ti₂AlNb-based alloys by controlling their phase composition and microstructure via aging and triggering the precipitation of brittle orthorhombic phase particles in the β phase matrix, which initiate cracks upon milling. The experiments were carried out for rapidly solidified fiber. Aging provided for a transition from the initial β phase alloy composition to the β+O composition. Depending on the aging temperature, the microstructure of the alloy consists of β phase grains with acicular O phase precipitates in the grain bulk, or lamellar particles in the grain bulk, and rounded ones at the grain boundaries. The sizes and morphology of the particles exert a significant effect on the microhardness of the alloy, reducing its plasticity and hence favoring the milling. The precipitation of coarse O phase particles as a result of 900 °C aging provides for the most efficient alloy milling.

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时效对高强度ti2alnb基合金球磨性能的影响

通过时效控制ti2alnb基高强度合金的相组成和显微组织，并在β相基体中析出脆性正交相颗粒，从而在铣削过程中引发裂纹，为ti2alnb基高强度合金的铣削加工提供了一条有前途的途径。对快速固化纤维进行了实验研究。时效使其从最初的β相合金成分转变为β+O成分。根据时效温度的不同，合金的显微组织为β相晶粒，晶粒中有针状的O相析出，或在晶粒中有片层状颗粒，在晶界处有圆形的O相析出。颗粒的大小和形态对合金的显微硬度有显著影响，降低了合金的塑性，从而有利于铣削加工。900°C时效后析出的粗O相颗粒提供了最有效的合金铣削。

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

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.