Microstructure and Electrochemical Behavior of a 3D-Printed Ti-6Al-4V Alloy

Yu，Zhijun1; Chen，Zhuo2; Qu，Dongdong3; Qu，Shoujiang1; Wang，Hao4; Zhao，Fu5; Zhang，Chaoqun6,7; Feng，Aihan1; Chen，Daolun8

2022-07-01

10.3390/ma15134473

MATERIALS   Impact Factor & Quartile

1996-1944

3D printing (or more formally called additive manufacturing) has the potential to revolutionize the way objects are manufactured, ranging from critical applications such as aerospace components to medical devices, making the materials stronger, lighter and more durable than those manufactured via conventional methods. While the mechanical properties of Ti-6Al-4V parts manufactured with two major 3D printing techniques: selective laser melting (SLM) and electron beam melting (EBM), have been reported, it is unknown if the corrosion resistance of the 3D-printed parts is comparable to that of the alloy made with isothermal forging (ISF). The aim of this study was to identify the corrosion resistance and mechanisms of Ti-6Al-4V alloy manufactured by SLM, EBM and ISF via electrochemical corrosion tests in 3.5% NaCl solution, focusing on the effect of microstructures. It was observed that the equiaxed alpha + beta microstructure in the ISF-manufactured Ti-6Al-4V alloy had a superior corrosion resistance to the acicular martensitic alpha ' + beta and lamellar alpha + beta microstructures of the 3D-printed samples via SLM and EBM, respectively. This was mainly due to the fact that (1) a higher amount of beta phase was present in the ISF-manufactured sample, and (2) the fraction of phase interfaces was lower in the equiaxed alpha + beta microstructure than in the acicular alpha ' + beta and lamellar alpha + beta microstructures, leading to fewer microgalvanic cells. The lower corrosion resistance of SLM-manufactured sample was also related to the higher strain energy and lower electrochemical potential induced by the presence of martensitic twins, resulting in faster anodic dissolution and higher corrosion rate.

additive manufacturing three-dimensional (3D) printing selective laser melting electron beam melting isothermal forging Ti-6Al-4V alloy corrosion resistance

SCI ; EI

English

Corresponding

National Nature Science Foundation of China[51871168] ; Key-Area Research and Development Program of Guangdong Province[2019B010941001] ; Major Special Science and Technology Project of Yunnan Province[202002AB08001-3]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter

WOS:000824246300001

MDPI

20222712319511

3D printers ; Aluminum alloys ; Aluminum corrosion ; Corrosion rate ; Corrosion resistant alloys ; Electrochemical corrosion ; Electron beam melting ; Electron beams ; Fabrication ; Isotherms ; Sodium chloride ; Strain energy ; Ternary alloys ; Textures ; Titanium alloys

Metallurgy and Metallography:531 ; Metals Corrosion:539.1 ; Aluminum:541.1 ; Aluminum Alloys:541.2 ; Titanium and Alloys:542.3 ; Printing Equipment:745.1.1 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Mechanics:931.1

2-s2.0-85133267809

Web of Science

1.School of Materials Science and Engineering,Tongji University,Shanghai,201804,China
2.Aerospace Hiwing (Harbin) Titanium Industrial Co.,Ltd,Harbin High Tech Zone,Harbin,150028,China
3.School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,4072,Australia
4.Interdisciplinary Center for Additive Manufacturing,School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai,200093,China
5.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
6.School of Materials,Sun Yat-sen University,Guangzhou,510275,China
7.Innovation Group of Marine Engineering Materials and Corrosion Control,Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai),Zhuhai,519082,China
8.Department of Mechanical and Industrial Engineering,Toronto Metropolitan University (Formerly Ryerson University),Toronto,M5B 2K3,Canada

Yu，Zhijun,Chen，Zhuo,Qu，Dongdong,et al. Microstructure and Electrochemical Behavior of a 3D-Printed Ti-6Al-4V Alloy[J]. MATERIALS,2022,15(13).

Yu，Zhijun.,Chen，Zhuo.,Qu，Dongdong.,Qu，Shoujiang.,Wang，Hao.,...&Chen，Daolun.(2022).Microstructure and Electrochemical Behavior of a 3D-Printed Ti-6Al-4V Alloy.MATERIALS,15(13).

Yu，Zhijun,et al."Microstructure and Electrochemical Behavior of a 3D-Printed Ti-6Al-4V Alloy".MATERIALS 15.13(2022).