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赵瑞峰,李金山,张颖,李佩璇,王嘉祥,邹程雄,唐斌,寇宏超,甘斌,张亮,王军,王毅.强磁场下退火对增材制造Ti-6Al-4V合金及其力学性能的影响[J].稀有金属材料与工程(英文),2018,47(12):3678~3685.[Ruifeng Zhao,Jinshan Li,Ying Zhang,Peixuan Li,Jiaxiang Wang,Chengxiong Zou,Bin Tang,Hongchao Kou,Bin Gan,Liang Zhang,Jun Wang and William Yi Wang.Improved Mechanical Properties of Additive Manufactured Ti-6Al-4V Alloy via Annealing in High Magnetic Field[J].Rare Metal Materials and Engineering,2018,47(12):3678~3685.]
Improved Mechanical Properties of Additive Manufactured Ti-6Al-4V Alloy via Annealing in High Magnetic Field
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Received:October 10, 2018  Revised:October 30, 2018
DOI:
Key words: Ti-6Al-4V  Selective laser melting  Heat treatment  Bonding charge density
Foundation item:the National Natural Science Foundation of China (Grants 51690163), National Key Research and Development Program of China (2016YFB0701304 and 2016YFB0701303), Project to Strengthen Industrial Development at the Grass-Roots Level (Project Number TC160A310/19), and Shanghai Rising-star Program (Project Number 18QB1400600).
Author NameAffiliation
Ruifeng Zhao,Jinshan Li,Ying Zhang,Peixuan Li,Jiaxiang Wang,Chengxiong Zou,Bin Tang,Hongchao Kou,Bin Gan,Liang Zhang,Jun Wang and William Yi Wang  
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Abstract:
      In this work, a novel magnetic-field-driving approach is proposed and utilized to efficiently enhance the mechanical properties of selective laser melting Ti-6Al-4V. The microstructures of the as-built and the SLM specimens annealed at 400°C, 800°C below the β transus, and 1200°C above the β transus for 30 minutes in the high magnetic field of 7 T are comprehensively characterized in terms of X-ray diffraction, optical microscope, scanning electron microscope, and atomic force microscope. Lattice distortion induced by Al and V atoms are characterized by bonding charge density, providing an insight into the atomic and electronic basis for the solid solution strengthening mechanism and the martensitic transformation mechanism. Referring to the as-built speciments, the ultimate tensile strength and the elongation of annealed specimens at 400 °C and 1200°C in 7T high magnetic field were increased due to the short annealing time. Based on the coupling effect of force field induced by the heat and magnetic, it is expected that the microstructures of SLM Ti-6Al-4V would be conventionally optimized through changing the phase transformation thermodynamics. The validation of this hypothesis will pave a path to develop a novel magnetic-field-driving approach efficiently enhancing the mechanical properties of additive manufactured materials.