Highly correlated deposition characteristics between individual elemental powders and elemental powder blends of MoNbTaTi in laser melt deposition

IF 5.3 2区 材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131418
Zihou Li , Chao Wang , Wenjing Fu , Hailin Nie , Wenxi Wang , Jun Luo
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Abstract

The laser melt deposition process often involves fabricating custom alloys from cost-effective elemental powder blends. However, discrepancies between the nominal ratio of the pre-mixed powders and the final composition of the deposited part are commonly observed due to variations in the material properties of the elemental powders. In this study, separate experiments were employed to investigate the relationship of deposition characteristics between individual elemental powders and elemental powder blends in the laser melt deposition process. To investigate the spatial distribution between elemental powder particles, powder flow characteristics in four different delivery systems were measured. Single-track deposition experiments were deployed to study the real powder catchment efficiency of elemental powder and the final composition of the deposited layer. In addition, a finite element model was established and validated with experimental data to predict the dilution rate and final chemical composition of the deposited layer. The experimental results indicate a strong correlation between the powder catchment efficiency of individual elemental powder and the final composition of the deposited layer. The simulation results agreed well with the actual composition of the deposited track. This study’s findings have the potential to predict and optimize the composition of the desired materials fabricated by elemental powder blends in the laser melt deposition process.

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激光熔融沉积中铌钽钛单元素粉末和元素粉末混合物之间高度相关的沉积特性
激光熔融沉积工艺通常涉及利用具有成本效益的元素粉末混合物制造定制合金。然而,由于元素粉末的材料特性不同,通常会发现预混合粉末的标称比例与沉积部件的最终成分之间存在差异。本研究采用了不同的实验来研究激光熔融沉积过程中单个元素粉末和元素粉末混合物之间沉积特性的关系。为了研究元素粉末颗粒之间的空间分布,测量了四种不同输送系统中的粉末流动特性。通过单轨沉积实验研究了元素粉末的实际粉末捕集效率和沉积层的最终成分。此外,还建立了一个有限元模型,并通过实验数据进行验证,以预测沉积层的稀释率和最终化学成分。实验结果表明,单个元素粉末的捕粉效率与沉积层的最终成分之间存在很强的相关性。模拟结果与沉积轨道的实际成分十分吻合。这项研究的结果有望预测和优化在激光熔融沉积过程中通过元素粉末混合物制造的所需材料的成分。
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来源期刊
Surface & Coatings Technology
Surface & Coatings Technology 工程技术-材料科学:膜
CiteScore
10.00
自引率
11.10%
发文量
921
审稿时长
19 days
期刊介绍: Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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