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中南大学学报(英文版)

Journal of Central South University

Vol. 28    No. 4    April 2021

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Microstructural evolution and mechanical properties of selective laser melted Ti-6Al-4V induced by annealing treatment
WANG Pei(王沛)1, CHEN Feng-hua(陈风华)1, J. ECKERT2, 3, S. PILZ4, S. SCUDINO4, K. G. PRASHANTH2, 5, 6

1. Additive Manufacturing Institute, College of Mechatronics and Control Engineering,
Shenzhen University, Shenzhen 518060, China;
2. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstra?e 12,
A-8700 Leoben, Austria;
3. Departmentof Materials Science, Chair of Materials Physics, Montanuniversit?t Leoben, Jahnstra?e 12,
A-8700 Leoben, Austria;
4. Institute for Complex Materials, Leibniz IFW Dresden, Helmholtzstra?e 20, D-01069 Dresden, Germany;
5. Department of Mechanical and Industrial Engineering, Tallinn University of Technology, Ehitajete tee 5,
19086 Tallinn, Estonia;
6. CBCMT, School of Mechanical Engineering, Vellore Institute of Technology, Vellore-632 014,
Tamil Nadu, India

Abstract:Ti-6Al-4V specimens were fabricated by selective laser melting (SLM) to study the effect of thermal treatment on the phase transformation, elemental diffusion, microstructure, and mechanical properties. The results show that vanadium enriches around the boundary of α phases with increasing annealing temperature to 973 K, and α′ phases transform into α+β at 973 K. The typical α′ martensite microstructure transforms to fine-scale equiaxed microstructure at 973 K and the equiaxed microstructure significantly coarsens with increasing annealing temperature to 1273 K. The SLM Ti-6Al-4V alloy annealed at 973 K exhibits a well-balanced combination of strength and ductility ((1305±25) MPa and (37±3) %, respectively).

 

Key words: selective laser melting; Ti-6Al-4V; annealing treatment; microstructure; mechanical properties

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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