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The effect of in-situ formed TiB2 particles on microstructural and mechanical properties of laser melted copper alloy

  • Jelena Stašić and Dušan Božić
Published/Copyright: January 31, 2020
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 111 Issue 2

Abstract

Mixed Cu-4Ti (wt.%) and Cu-1.4B (wt.%) powders were separately mechanically alloyed and then homogenized. The obtained powder was laser melted by pulsed Nd:YAG laser and heat treated at 900 °C for 10 h in argon. 3D compacts were characterized by means of digital camera images, optical microscopy and scanning electron microscopy. Microstructure after laser melting varies regionally due to mixing of two different mechanically alloyed powders and contains in-situ formed microparticles of primary TiB2. Formation of secondary TiB2 nanoparticles was possible only after high temperature heat treatment (900 °C, for 10 h) as concluded from X-ray diffraction analysis, chemical analysis, and microhardness tests of laser melted and heat treated parts. Copper matrix was strengthened to a significantly higher extent after the formation of secondary TiB2 nanoparticles.

Keywords: Cu–Ti–B powder; Mechanical alloying; Laser melting; Heat treatment; TiB2 in-situ reinforcement
∗ Correspondence address, Dr. Jelena Stašić, Institute of Nuclear Sciences “Vinča”, University of Belgrade, Mike Petrovića Alasa 12–14, 11001 Belgrade, Serbia. Tel.: +381 113408779, E-mail:

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Received: 2019-04-18
Accepted: 2019-10-01
Published Online: 2020-01-31
Published in Print: 2020-02-12

© 2020, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111865
Keywords for this article
Cu–Ti–B powder; Mechanical alloying; Laser melting; Heat treatment; TiB2 in-situ reinforcement

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Solidification processes of as-cast alloys and phase equilibria at 1 300 °C of the Nb–Si–V ternary system
  5. Compressive properties and energy absorption response of cBN added Al composite foams
  6. Deformation characteristics of Cu-30 % Zn alloy subjected to dynamic equal channel angular pressing (DECAP)
  7. Stress-based forming limit diagrams (SFLD) considering strain rate effect and ductile damage phenomenon
  8. Processing and properties of ultrafine-grained Mg-3Al-1Zn magnesium alloy microtubes fabricated via isothermal hot microforming of SPD processed precursors
  9. The effect of in-situ formed TiB2 particles on microstructural and mechanical properties of laser melted copper alloy
  10. Nanoindentation study on Al86Ni8Y6 glassy alloy synthesized via mechanical alloying and spark plasma sintering
  11. Synthesis of nanosized cadmium ferrite and assaying its magnetic and dielectric properties by analytical and physical techniques
  12. BN nanosheet modified SnO materials for enhancing photocatalytic properties
  13. Preparation of salt microparticles via the anti-solvent recrystallization process
  14. Short Communications
  15. CVD grown graphene on commercial and electroplated Cu substrates: Raman spectroscopy analysis
  16. DGM News
  17. DGM News
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