Selective laser melting under the reactive atmosphere: A convenient and efficient approach to fabricate ultrahigh strength commercially pure titanium without sacrificing ductility

Wang, D. W.1,2,3; Zhou, Y. H.1,2,4; Shen, J.5; Liu, Y.6; Li, D. F.7; Zhou, Q.8,9; Sha, G.8,9; Xu, P.10; Ebel, T.10; Yan, M.1,2

2019-08-05

10.1016/j.msea.2019.138078

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

This study presents a novel approach for the fabrication of commercially pure titanium (CP-Ti) components. The approach conferred superb strength to CP-Ti without sacrificing its ductility. A yield strength of 807 MPa combined with 19.15% elongation was realized through selective laser melting (SLM) by using a high-power laser and incorporating solute atoms from the Ar - N-2 reactive atmosphere. Mechanical properties and microstructures of the as-printed CP-Ti were systematically investigated. Transmission electron microscopy, electron backscatter diffraction, and atom probe tomography were employed to reveal the mechanism underlying the in situ reaction between CP-Ti and the reactive atmosphere. Results suggested that nitrogen generally dissolved in the alpha'-Ti matrix as interstitial solute atoms. The beneficial N content has a critical limit of similar to 0.43 wt%. The ductility of CP-Ti will decrease drastically if its N content exceeds this limit. A constitutive model was developed for describing the tensile deformation behavior of the in-situ strengthened CP-Ti over various solute contents and grain sizes. This work demonstrates a promising methodology for the fabrication of high-performance metallic components and extends the fundamental understanding of SLM process under the reactive atmosphere.

Additive manufacturing Selective laser melting Commercially pure titanium Atmosphere Mechanical properties

SCI ; EI

英语

第一 ; 通讯

National Science Foundation of Guangdong Province[2016A030313756]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000479025800016

ELSEVIER SCIENCE SA

20192707141453

3D printers ; Argon lasers ; Atom lasers ; Atoms ; Ductility ; Earth atmosphere ; Fabrication ; High power lasers ; High resolution transmission electron microscopy ; Mechanical properties ; Melting ; Selective laser melting ; Titanium ; Titanium compounds ; Titanium metallography

Atmospheric Properties:443.1 ; Titanium and Alloys:542.3 ; Optical Devices and Systems:741.3 ; Lasers, General:744.1 ; Printing Equipment:745.1.1 ; Chemical Operations:802.3 ; Atomic and Molecular Physics:931.3 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China
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8.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China
9.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China
10.Inst Mat Res, Helmholt Zentrum Geesthacht, D-21502 Geesthacht, Germany

Wang, D. W.,Zhou, Y. H.,Shen, J.,et al. Selective laser melting under the reactive atmosphere: A convenient and efficient approach to fabricate ultrahigh strength commercially pure titanium without sacrificing ductility[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,762.

Wang, D. W..,Zhou, Y. H..,Shen, J..,Liu, Y..,Li, D. F..,...&Yan, M..(2019).Selective laser melting under the reactive atmosphere: A convenient and efficient approach to fabricate ultrahigh strength commercially pure titanium without sacrificing ductility.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,762.

Wang, D. W.,et al."Selective laser melting under the reactive atmosphere: A convenient and efficient approach to fabricate ultrahigh strength commercially pure titanium without sacrificing ductility".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 762(2019).