Effects of ultrasonic vibration on mechanical properties and microstructure evolution of Ti-6Al-4V alloy manufactured by laser direct energy deposition

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-04-18 DOI:10.1016/j.matlet.2025.138600

Chunhuan Guo , Hanyu Yin , Wei Chen , Fengchun Jiang

引用次数: 0

Abstract

To investigate the effects of ultrasonic vibration (UV) on mechanical properties and microstructure evolution of Ti-6Al-4V alloy manufactured by laser direct energy deposition, a series of experiments have been carried out by the INSTRON testing machine, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results demonstrate that UV significantly enhances the plasticity of Ti-6Al-4V alloy, with an increase in elongation by 87.4 % and tensile strength by 4.04 %. And the phenomenon of HCP-FCC phase transformation of Ti-6Al-4V alloy has been found during additive manufacturing under the UV. The formation of FCC nano-twinned phase contributes to the enhancement of the mechanical properties of Ti-6Al-4V alloy to some extent.

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超声振动对激光直接能量沉积Ti-6Al-4V合金力学性能和组织演变的影响

为了研究超声振动（UV）对激光直接能量沉积Ti-6Al-4V合金力学性能和显微组织演变的影响，采用INSTRON试验机、扫描电镜（SEM）和透射电镜（TEM）进行了一系列实验研究。结果表明：UV处理能显著提高Ti-6Al-4V合金的塑性，伸长率提高87.4%，抗拉强度提高4.04%；在UV下增材制造过程中发现了Ti-6Al-4V合金的HCP-FCC相变现象。FCC纳米孪晶相的形成在一定程度上促进了Ti-6Al-4V合金力学性能的提高。

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