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Additive manufacturing of Ti-Al functionally graded material by laser based directed energy deposition

Bo Chen (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China and Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China)
Tao Wang (Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China, and)
Xin Xi (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China and Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China)
Caiwang Tan (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China and Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China)
Xiaoguo Song (State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, China and Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, China)

Rapid Prototyping Journal

ISSN: 1355-2546

Article publication date: 30 August 2022

Issue publication date: 2 March 2023

512

Abstract

Purpose

Ti-Al composite plates have been used in aerospace and other important fields for specific purposes in recent years. However, relatively few studies have concentrated on Ti-Al additive manufacturing because during additive manufacturing process the local fusion and mixing of Ti/Al are inevitable. These areas where Ti and Al are mixed locally, especially interface, could easily generate high residual stresses and cracks. This study aims to manufacture Ti-Al functionally graded material and investigate the interaction of interface.

Design/methodology/approach

In this study, Ti6Al4V/AlSi10Mg functionally graded materials were fabricated by laser based directed energy deposition (L-DED) and a strategy using V interlayer to relieve interfacial stress was investigated.

Findings

The area between the two materials was divided into transition zone (TZ) and remelting zone (RZ). The phase distribution, microstructure and micro-Vickers hardness of the TZ and RZ were investigated. Typical intermetallic compounds (IMCs) such as TiAl3, Ti3Al and Ti5Si3 were found in both composites. The addition of V interlayer promoted the homogenization of IMCs near interface and led to the formation of new phases like V5Si3 and Al3V.

Originality/value

The solidification process near the interface of Ti-Al functionally graded material and the possible generation of different phases were described. The result of this paper proved the feasibility of manufacturing Ti-Al functionally graded material by L-DED.

Keywords

Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 52175309), Shandong Provincial Key Research and Development Program under the Grant (No. 2018GGX103026), Shandong Provincial Natural Science Foundation under the Grant (No. ZR2017MEE042).

Citation

Chen, B., Wang, T., Xi, X., Tan, C. and Song, X. (2023), "Additive manufacturing of Ti-Al functionally graded material by laser based directed energy deposition", Rapid Prototyping Journal, Vol. 29 No. 3, pp. 558-568. https://doi.org/10.1108/RPJ-04-2022-0117

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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