Mechanical properties and strain rate sensitivity of 3D laserdeposited Ti-6Al-4V alloy

Sanghyun Woo,Yerim Lee,Leeju Park,E Buzaud,A Cosculluela,H Couque,E Cadoni

doi:10.1051/epjconf/201818304002

Abstract

Ti-6Al-4V has become the most common material in titanium alloy. Due to High specific strength, low density and excellent mechanical properties, it has been used in not only living, sports goods but also aerospace, defense industries. Usually these products have complex geometry, so there are a lot of limitations in general manufacturing process. Especially in weapon systems, applied loadings are severe therefore choice of materials is very important. 3D printing method is useful for manufacturing these complicated structure and suitable to discontinued, superannuated part of products. In this study, specimen for experiments is turned out by using 3d laser deposition technology which metal powder is injected into the focused beam of a high-powered laser. While lots of studies are mainly concerned with normal process, it is not commonly researched for metallic materials forming through 3D printing. In the 10-3~103/s strain rates range, two kinds of plate samples and LDAM Ti-6Al-4V were performed using universal testing machine and SHPB for dynamic material properties. Simplified Johnson-Cook constitutive equation parameters produced from these experiments.

Highlights

Ti-6Al-4V (6wt%Al, 4wt%V hereinafter referred to as Ti64) accounts for more than 60% of titanium alloy and has widely used typical material in various industries
Laser engineered net shaping (LENS) and laser solid forming (LSF) technique were proposed by Sandia National Laboratories and Air Force Research Laboratory in 1996, 1997 respectively [1,2,3]
In LDAM laser power process, powder feeding rate and scanning speed are important consideration to get an appropriate process for finished products, it is closely related with product width and height of each layer

Summary

Introduction

Ti-6Al-4V (6wt%Al, 4wt%V hereinafter referred to as Ti64) accounts for more than 60% of titanium alloy and has widely used typical material in various industries Demand for this alloy has rapidly increased especially in aerospace, defense and medical industries due to its relatively low density, high specific strength and excellent mechanical properties. It shows excellent corrosion resistance in oxidization environment and thermal resistance at high temperature. Those final products in these areas are usually having complicate and complex geometry. Laser engineered net shaping (LENS) and laser solid forming (LSF) technique were proposed by Sandia National Laboratories and Air Force Research Laboratory in 1996, 1997 respectively [1,2,3]

Methods

Results

Conclusion