Next Article in Journal
Design and Preparation of a 6-Channel Fan-Shaped Integrated Narrow-Band Filter in the Mid-Infrared Band
Previous Article in Journal
Microstructure and Microhardness of Ni/Al-TiB2 Composite Coatings Prepared by Cold Spraying Combined with Postannealing Treatment
Previous Article in Special Issue
TiBCN-Ceramic-Reinforced Ti-Based Coating by Laser Cladding: Analysis of Processing Conditions and Coating Properties
Open AccessArticle

Distribution of Al Element of Ti–6Al–4V Joints by Fiber Laser Welding

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(9), 566; https://doi.org/10.3390/coatings9090566
Received: 10 July 2019 / Revised: 26 August 2019 / Accepted: 3 September 2019 / Published: 5 September 2019
(This article belongs to the Special Issue Laser Surface Modification of Metallic Materials)
In the process of laser welding, the uneven distribution of solute elements caused by element burning loss and flow of molten pool affects the quality of joints. In this paper, butt welding experiments were conducted on the 3 mm thick Ti–6Al–4V specimens with different preset ratios of Al and Si powders by using 4 kW fiber laser. The distribution of Al solute element and its influence on the microstructure and mechanical properties of the final weld joint were investigated. The results showed that the self-diffusion of Al element and the flow of molten pool affects the alloy elements distribution in laser welding. And the microhardness of the welded joint with Ti–6Al–4V and 90% Al + 10% Si powders was significantly higher than that with only Ti–6Al–4V, with the difference of about 130HV. At the same time, in the joint with 90% Al and 10% Si powders, the acicular α’ size was finer, and basketweave microstructure was present as well. This research is helpful to better understand the distribution of Al solute element and its influence on the joint quality during laser welding of Ti–6Al–4V alloy, which provides a certain reference for improving the weld or surface properties of Ti–6Al–4V alloy during laser processing. View Full-Text
Keywords: Ti–6Al–4V alloy; laser welding; elements distribution; structure morphology; microhardness Ti–6Al–4V alloy; laser welding; elements distribution; structure morphology; microhardness
Show Figures

Figure 1

MDPI and ACS Style

Zhang, J.; Hu, R.; Pang, S.; Huang, A. Distribution of Al Element of Ti–6Al–4V Joints by Fiber Laser Welding. Coatings 2019, 9, 566.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop