Next Article in Journal
Influence of the Water-Cooled Heat Exchanger on the Performance of a Pulse Tube Refrigerator
Next Article in Special Issue
Novel Composite Powders with Uniform TiB2 Nano-Particle Distribution for 3D Printing
Previous Article in Journal
Optical Beam Deflection Based AFM with Integrated Hardware and Software Platform for an Undergraduate Engineering Laboratory
Previous Article in Special Issue
Development of a Robotic Arm Based Hydrogel Additive Manufacturing System for In-Situ Printing
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Appl. Sci. 2017, 7(3), 227; doi:10.3390/app7030227

Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source

1
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2
Shenyang Siasun Robot Automation Co., Ltd., Shenyang 110168, China
*
Author to whom correspondence should be addressed.
Academic Editor: Peter Van Puyvelde
Received: 10 January 2017 / Revised: 22 February 2017 / Accepted: 23 February 2017 / Published: 28 February 2017
(This article belongs to the Special Issue Materials for 3D Printing)
View Full-Text   |   Download PDF [7166 KB, uploaded 28 February 2017]   |  

Abstract

Vertical wire feeding with an axisymmetric multi-laser source (feeding the wire vertically into the molten pool) has exhibited great advantages over LAM (laser additive manufacturing) with paraxial wire feeding, which has an anisotropic forming problem in different scanning directions. This paper investigates the forming ability of vertical wire feeding with an axisymmetric multi-laser source, and the microstructure and mechanical properties of the fabricated components. It has been found that vertical wire feeding with an axisymmetric multi-laser source has a strong forming ability with no anisotropic forming problem when fabricating the complex parts in a three-axis machine tool. Most of the grains in the samples are equiaxed grains, and a small amount of short columnar grains exist which are parallel to each other. The microstructure of the fabricated samples exhibits a fine basket-weave structure and martensite due to the fast cooling rate which was caused by the small size of the molten pool and the additional heat dissipation from the feeding wire. The static tensile test shows that the average ultimate tensile strength is 1140 MPa in the scanning direction and 1115 MPa in the building direction, and the average elongation is about 6% in both directions. View Full-Text
Keywords: vertical wire feeding; laser additive manufacturing; Ti-6Al-4V titanium alloy vertical wire feeding; laser additive manufacturing; Ti-6Al-4V titanium alloy
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Fu, J.; Gong, L.; Zhang, Y.; Wu, Q.; Shi, X.; Chang, J.; Lu, J. Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source. Appl. Sci. 2017, 7, 227.

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.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top