Ti Alloy Three-Way Pipe Fabricated by the Combination of 3D Printing and Cold Isostatic Pressing

Yanru Shao, Fang Yang, Peng Liu, Zhaohong Feng, Xin Lu, Zhimeng Guo, Huan Xu, Alex A. Volinsky

Research output: Contribution to journalArticle

Abstract

In this study, complex-shaped Ti alloys with near-full density, using three-way pipe as an example, were achieved by the combination of 3D printing and cold isostatic pressing (CIP). A new CIP capsule consisting of porous internal support core and the external shell was prepared by 3D printing, which made it feasible to achieve internal and external co-pressing on Ti-6Al-4V powder during CIP. Therefore, complex-shaped green body was obtained with good surface quality, without obvious defects or cracks. After sintering at 1230 °C, the sintered sample had equivalent mechanical properties (hardness = 382 HV, elongation = 15.5%, tensile strength = 929 MPa and yield strength = 862 MPa) compared to the ASTMB381 standard. This study presents a novel method for fabricating complex-shaped Ti alloys with comprehensive mechanical properties.

Original languageEnglish
Pages (from-to)6219-6227
Number of pages9
JournalJournal of Materials Engineering and Performance
Volume28
Issue number10
DOIs
Publication statusPublished - 2019 Oct 1
Externally publishedYes

Keywords

  • 3D printing
  • cold isostatic pressing
  • complex-shaped
  • three-way pipe
  • Ti alloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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