选区激光熔化成形多孔Ti6Al4V (ELI)合金的拉伸性能及断裂机制

doi:10.11896/cldb.19030060

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Abstract In order to investigate the influence of structural parameters such as porosity and strut diameter on the tensile properties of porous Ti6Al4V (ELI) alloy, octahedral porous Ti6Al4V (ELI) alloy was precisely fabricated by selective laser melting. The tensile test of porous Ti6Al4V (ELI) alloy with different structural parameters was carried out at room temperature, the fracture morphology of the alloy was observed by scanning electron microscopy to reveal the failure mechanism in tension. Results show that tensile strength and elongation increase with the increase of strut thickness when the porosity is the same, while mechanical properties decrease with the increase of porosity when with similar strut thickness. The massive terraces and few dimples at the fracture surface indicate the brittle and ductile fracture mechanism of the SLM-ed Ti6Al4V (ELI) alloy.

Key words： additive manufacturing selective laser melting porous structure Ti6Al4V (ELI) alloy tension

Published: 15 January 2020

CLC number:	TG113.25
	TG115.5

About author:: Qing Li, master of the School of Materials Science and Engineering, South China University of Technology. He learned at the Guangdong Institute of New Materials from July 2017 to June 2019, focusing on the research of additive manufacturing of metals;Min Liu, professor and the vice president of Guangdong Academic of Sciences. He has been engaged in the researches and applications of additive manufactu-ring and thermal spraying. He has presided more than 30 projects, including 973, 863 supporting military industry and provincial major projects.

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	LI Qing
	ZHAO Guorui
	MA Wenyou
	YU Hongya
	LIU Min

Cite this article:

LI Qing,ZHAO Guorui,MA Wenyou, et al. Mechanical Properties and Fracture Mechanism of Porous Ti6Al4V (ELI) Alloy Fabricated by Selective Laser Melting[J]. Materials Reports, 2020, 34(4): 4073-4076.

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http://www.mater-rep.com/EN/10.11896/cldb.19030060 OR http://www.mater-rep.com/EN/Y2020/V34/I4/4073

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