Mechanical properties comparison of Ti6Al4V produced by different technologies under static load conditions

I Bondrea,N.F Cofaru,M Inţă,Karolina Karolewska,Bogdan Ligaj

doi:10.1051/matecconf/201929008010

Abstract

The most commonly used technology among the additive manufacturing is Direct Metal Laser Sintering (DMLS). This process is based on selective laser sintering (SLS). The method gained its popularity due to the possibility of producing metal parts of any geometry, which would be difficult or impossible to obtain by the use of conventional manufacturing techniques. Materials used in the elements manufacturing process are: titanium alloys (e.g. Ti6Al4V), aluminium alloy AlSi10Mg, etc. Elements printed from Ti6Al4V titanium alloy find their application in many industries. Details produced by additive technology are often used in medicine as skeletal, and dental implants. Another example of the DMLS elements use is the aerospace industry. In this area, the additive manufacturing technology produces, i.a. parts of turbines. In addition to the aerospace and medical industries, DMLS technology is also used in motorsport for exhaust pipes or the gearbox parts. The research objects are samples for static tests. These samples were made of Ti6Al4V alloy by the DMLS method and the rolling method from a drawn rod. The aim of the paper is the mechanical properties comparative analysis of the Ti6Al4V alloy produced by the DMLS method under static loading conditions and microstructure analysis of this material.

Highlights

Metal elements manufactured abusing additive technologies are nowadays increasingly used
The experimental results and the results published in the publications show that the Ti6Al4V material produced with the Direct Metal Laser Sintering (DMLS) additive technology is characterized by higher value of the strength Su and the yield point Sy0.2 than the material produced by the traditional method
The experimental and literature data show that the Ti6Al4V material produced with the DMLS additive technology is characterized by a higher value of the Su strength and the yield stress Sy0.2 than the material produced by the traditional method

Summary

Introduction

Metal elements manufactured abusing additive technologies are nowadays increasingly used. The component manufacturing process precedes the creation of a three-dimensional computer model This allows to make rapid changes and better matching of the element without the need to produce a detail, translating into costs and time savings [10]. For this reason, metal parts manufactured by additive methods are used in medicine, aerospace and motorsports. Creating a 3D computer model of the structural element enable making rapid changes before production, which allow for savings in time and costs, make additive technologies more popular in machine construction Their special advantage is the ability to manufacture parts of any geometry, which would be impossible or very difficult to obtain using classical manufacturing techniques. The control parameter during the tests was the displacement of the machine piston of 0.05 mm / s

Research stand

Comparison of own research results with the results of other authors

Determining the work needed to create a damage

The sample damage method analysis during a tensile test

Conclusion