Study of flow stress and spall strength of additively manufactured Ti-6-4 alloy

Vitaly Paris, Amitai Cohen, Eli Gudinetsky, Refael Hevroni, Shmuel Samuha, Shmuel Osovsky, Eitan Tiferet, Arnon Yosef-Hai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

The use of additive manufacturing (AM) by Electron Beam Melting (EBM) or Selective Laser Melting (SLM) has extensively grown in the past few years. A major goal in AM is to manufacture materials with mechanical properties at least as good as traditionally manufactured materials. In this work we present the results of planar impact tests and Split Hopkinson Pressure Bar tests (SHPB) on Ti-6Al-4V manufactured by EBM and LSM techniques. Stress strain curves based on SHPB measurements at strain rate of about 1500 s-1 display similar plastic flow stresses for SLM and EBM processed Ti-6Al-4V alloys, and about 15% higher than reported for commercial Ti-6Al-4V alloy. Results of planar impact tests on SLM samples display slightly higher spall strength than EBM while the stress at Hugoniot elastic limit (HEL) is practically the same. Hugoniot elastic limit and spall strength estimates for EBM-and SLM-processed Ti-6Al-4V alloys are at least as high as values obtained for conventionally-processed alloys. The results of post mortem SEM analysis of the spall fracture have demonstrated significant differences in the spall fracture characteristics between the AM-processed and commercial Ti-6Al-4V alloys.

Original languageEnglish
Title of host publicationDYMAT 2018 - 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
EditorsAntonio Cosculluela, Ezio Cadoni, Eric Buzaud, Herve Couque
PublisherEDP Sciences
ISBN (Print)9782759890538
DOIs
StatePublished - 7 Sep 2018
Externally publishedYes
Event12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018 - Arcachon, France
Duration: 9 Sep 201814 Sep 2018

Publication series

NameEPJ Web of Conferences
Volume183
ISSN (Print)2101-6275
ISSN (Electronic)2100-014X

Conference

Conference12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018
Country/TerritoryFrance
CityArcachon
Period9/09/1814/09/18

ASJC Scopus subject areas

  • Physics and Astronomy (all)

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