Microstructural evolution and mechanical properties of selective laser melted Ti-6Al-4V induced by annealing treatment

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Pei Wang
  • Feng hua Chen
  • S. Pilz
  • S. Scudino
  • K. G. Prashanth

Organisational units

External Organisational units

  • Additive Manufacturing Institute
  • Erich Schmid Institute of Materials Science
  • Leibniz Institute for Solid State and Materials Research, Dresden
  • Tallinn University of Technology
  • VIT University

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).

Details

Original languageEnglish
Pages (from-to)1068-1077
Number of pages10
JournalJournal of Central South University = Zhongnan-Daxue-xuebao : yingwen-ban
Volume28.2021
Issue number4
DOIs
Publication statusPublished - 19 May 2021