基于送粉和送丝的激光辅助增材制造Ti–6Al–4V的稳健界面与优异打印态力学性能

翁飞; 毕贵军; 周友翔; 隋尚; 谭超林; Zhenglin Du; 苏金龙; Fern Lan Ng

doi:10.1007/s12613-024-3003-8

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文章导航 > 矿物冶金与材料学报（英文） > 2025 > 32(1): 154-168

Fei Weng, Guijun Bi, Youxiang Chew, Shang Sui, Chaolin Tan, Zhenglin Du, Jinlong Su, and Fern Lan Ng, Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 154-168. https://doi.org/10.1007/s12613-024-3003-8

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Fei Weng, Guijun Bi, Youxiang Chew, Shang Sui, Chaolin Tan, Zhenglin Du, Jinlong Su, and Fern Lan Ng, Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire, Int. J. Miner. Metall. Mater., 32(2025), No. 1, pp. 154-168. https://doi.org/10.1007/s12613-024-3003-8

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研究论文

基于送粉和送丝的激光辅助增材制造Ti–6Al–4V的稳健界面与优异打印态力学性能

1)
山东大学材料科学与工程学院, 材料液固结构演变与加工教育部重点实验室, 超硬材料山东工程技术研究中心, 济南 250061, 中国
2)
广东省科学院智能制造研究所, 广州 510095, 中国
3)
新加坡制造技术研究院, Cleantech Loop 5号 636732, 新加坡

通讯作者:
毕贵军 E-mail: gj.bi@giim.ac.cn

周友翔 E-mail: chewyx@simtech.a-star.edu.sg

文章亮点

(1) 采用送粉和送丝激光辅助增材制造成功制备了Ti–6Al–4V 合金及其界面样品。

(2) 揭示了送粉、送丝激光辅助增材制造和锻造Ti–6Al–4V合金之间的稳固界面特征。

(3) 阐明了沉积态样品机械性能与其微观组织结构之间的内在联系。

中文摘要

本研究探讨了基于送粉激光辅助增材制造（LAAM_p）和送丝激光辅助增材制造（LAAM_w）制备Ti–6Al–4V样件的可行性。首先，通过LAAM_p和LAAM_w工艺研究成功规避了Ti–6Al–4V沉积物中的缺陷。进而，利用优化的工艺参数，在粉末/丝材沉积物与锻造基材之间以及粉末与丝材沉积物之间实现了牢固的结合界面。微观组织表征结果显示，Ti–6Al–4V沉积物中存在外延的初生β晶粒，在β晶粒内部，粉末沉积物主要以较细的α′相为主，而丝材沉积物则主要以片层状α相为主。本文分析并讨论了样件中不同微观组织的形成机制及其与力学性能的内在关联。即使未经热处理，粉末沉积物和丝材沉积物界面样件的力学性能也能达到相关航空材料规范（AMS 6932）的要求。在拉伸实验后，断裂未发生在界面区域，进一步表明了界面的牢固性。本研究证实了通过LAAM_p和LAAM_w相结合直接制造Ti–6Al–4V零件的可行性，可在满足所需尺寸精度和沉积速率的同时保证其强度与延展性。

关键词:

Research Article

Robust interface and excellent as-built mechanical properties of Ti–6Al–4V fabricated through laser-aided additive manufacturing with powder and wire

+ Author Affiliations

1)
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong Engineering & Technology Research Center for Superhard Material, School of Materials Science and Engineering, Shandong University, Jinan 250061, China
2)
Institute of Intelligent Manufacturing, Guangdong Academy of Sciences, Guangzhou 510095, China
3)
Singapore Institute of Manufacturing Technology, 5 Cleantech Loop, 636732, Singapore

Guijun Bi is an editorial board member for this journal and was not involved in the editorial review or the decision to publish this article. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Corresponding authors:
Guijun Bi E-mail: gj.bi@giim.ac.cn

Youxiang Chew E-mail: chewyx@simtech.a-star.edu.sg
Received: 25 June 2024; Revised: 15 August 2024; Accepted: 9 September 2024; Available online: 10 September 2024

Abstract

Abstract

The feasibility of manufacturing Ti–6Al–4V samples through a combination of laser-aided additive manufacturing with powder (LAAM_p) and wire (LAAM_w) was explored. A process study was first conducted to successfully circumvent defects in Ti–6Al–4V deposits for LAAM_p and LAAM_w, respectively. With the optimized process parameters, robust interfaces were achieved between powder/wire deposits and the forged substrate, as well as between powder and wire deposits. Microstructure characterization results revealed the epitaxial prior β grains in the deposited Ti–6Al–4V, wherein the powder deposit was dominated by a finer α′ microstructure and the wire deposit was characterized by lamellar α phases. The mechanisms of microstructure formation and correlation with mechanical behavior were analyzed and discussed. The mechanical properties of the interfacial samples can meet the requirements of the relevant Aerospace Material Specifications (AMS 6932) even without post heat treatment. No fracture occurred within the interfacial area, further suggesting the robust interface. The findings of this study highlighted the feasibility of combining LAAM_p and LAAM_w in the direct manufacturing of Ti–6Al–4V parts in accordance with the required dimensional resolution and deposition rate, together with sound strength and ductility balance in the as-built condition.
- laser-aided additive manufacturing;
- powder deposition;
- wire deposition;
- interfacial characteristic;
- mechanical behavior

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