Inheritance of microstructure and mechanical properties in laser powder bed fusion additive manufacturing: A feedstock perspective

Wang，D. W.1,3; Zhou，Y. H.1; Yao，X. Y.1; Dong，Y. P.1; Feng，S. H.1; Liu，Z. Y.2; Wang，H.2; Yan，M.1,3

2022-01-14

10.1016/j.msea.2021.142311

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

0921-5093

1873-4936

Correlation between the feedstock powder and the as-printed products is well expected in laser powder bed fusion (LPBF). However, the inheritance/heredity relationship between the feedstock powder and the products remains broadly overlooked since most atomized powders are printed without any modification. This study addresses the inheritance issue through comparing the hydrogenation/dehydrogenation (HDH) Ti powder with the ball-milled (BM) Ti powder, as well as the respective as-printed samples. Rietveld refinement, focused ion beam, electron backscatter diffraction, and transmission electron microscopy are employed to characterize the microstructure; uniaxial tensile tests and fractographic observation are performed for the mechanical analysis; single-track finite element simulations are conducted to reveal the varied powder-bed properties. A “core-shell” powder structure has been generated through the ball milling modification. Nano-crystallites in the “shell” and stress-induced twins have brought significant grain refinement to the BM powder. A β-to-α massive transformation has been observed in the samples printed using HDH powder, whereas the microstructure changes to fully-martensitic when using BM powder as the feedstock. Excellent mechanical performance (∼1000 MPa tensile strength with ∼20% ductility) have been achieved through inheriting the fine microstructure and oxygen content from the BM powder, which are induced by the powder modification process. This study has therefore unveiled the comprehensive correlation between the feedstock powder and the as-printed Ti, highlighting a novel methodology for developing additively-manufactured, cost-effective, and high-performance materials through tailoring the feedstock powder.

Additive manufacturing Feedstock Heredity Laser powder bed fusion Selective laser melting Titanium and titanium alloys

SCI ; EI

英语

第一 ; 通讯

Shenzhen Science and Technology Innovation Commission[JCYJ20180504165824643] ; Research and Development Program Project in Key Areas of Guangdong Province[2019B090907001] ; National Natural Science Foundation of China[51971108] ; National Science Fund of State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body[31915006]

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

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

WOS:000729807700002

ELSEVIER SCIENCE SA

20214811244871

3D printers ; Additives ; Ball milling ; Cost effectiveness ; Feedstocks ; Grain refinement ; High resolution transmission electron microscopy ; Ion beams ; Martensitic transformations ; Rietveld refinement ; Tensile strength ; Tensile testing ; Textures

Metallography:531.2 ; Titanium and Alloys:542.3 ; Optical Devices and Systems:741.3 ; Printing Equipment:745.1.1 ; Chemistry:801 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Industrial Economics:911.2 ; High Energy Physics:932.1

MATERIALS SCIENCE

2-s2.0-85119977035

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering,College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen,518060,China
3.State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha,410006,China

Wang，D. W.,Zhou，Y. H.,Yao，X. Y.,et al. Inheritance of microstructure and mechanical properties in laser powder bed fusion additive manufacturing: A feedstock perspective[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,832.

Wang，D. W..,Zhou，Y. H..,Yao，X. Y..,Dong，Y. P..,Feng，S. H..,...&Yan，M..(2022).Inheritance of microstructure and mechanical properties in laser powder bed fusion additive manufacturing: A feedstock perspective.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,832.

Wang，D. W.,et al."Inheritance of microstructure and mechanical properties in laser powder bed fusion additive manufacturing: A feedstock perspective".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 832(2022).