Effects of pulsed current-assisted LDM on pore distribution and microstructure evolution of fabricated TC4 multi-layer structures

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

Materials Letters Pub Date : 2025-05-31 DOI:10.1016/j.matlet.2025.138861

Yi Wang , Xinlin Wang , Mengru You , Haihan Li

引用次数: 0

Abstract

The study investigated the effects of pulsed current on the pore distribution and microstructural phase transitions in different regions of TC4 titanium alloy during single-track multi-layer laser direct deposition. The results revealed that the pulsed current significantly reduced the porosity and pore size in the bottom region of the deposited layers, while the effect of reducing the porosity in the middle and top regions was relatively limited. The combined effects of Joule heating and electron wind force facilitated the diffusion of V elements and the atomic migration of the β phase in TC4, thereby influencing the morphology of primary β grains and secondary α grains.

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脉冲电流辅助LDM对制备TC4多层结构孔隙分布及微观结构演化的影响

研究了脉冲电流对TC4钛合金单轨多层激光直接沉积过程中不同区域孔隙分布和显微组织相变的影响。结果表明，脉冲电流显著降低了沉积层底部的孔隙率和孔径，而降低中部和顶部孔隙率的效果相对有限。焦耳加热和电子风力的共同作用促进了TC4中V元素的扩散和β相的原子迁移，从而影响了初生β晶粒和次生α晶粒的形貌。

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