Numerical Modelling and Influence of Cu Addition on the Microstructure and Mechanical Properties of Additive Manufactured Ti–Al–Cu/Ti–6Al–4V Composite

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4 Citations (Scopus)

Abstract

Laser metal deposition technique was used for the fabrication of Ti–Al–Cu coating on Ti–6Al–4V Alloy. The microstructure and elemental and phase composition of coatings were studied. The SEM images showed the homogeneous distribution of Cu addition in Ti–10Al–9Cu at scanning speed of 1.0 m/min. Strong metallurgical bond without pores and cracks were observed between the coating and the substrate. Grain refinement was observed within the microstructure as the grains grew in a columnar and dendritic pattern in a counter direction to heat flow. However, the cross-section microstructures of Ti–10Al–6Cu and Ti–10Al–3Cu at 0.8 and 1.0 m/min scanning speed and laser power of 1000 and 1100 W showed minute pores and cracks. The existence of amorphous phase revealed via XRD was also observed in the coatings. The microstructure of these alloys is highly influenced by processes involving plastic deformation and thermal treatments which, in effect, determines the mechanical properties adhering to desired properties. The microhardness testing results indicated that the fabricated coatings had enhanced by 61.9% as compared to the micro-hardness of the Ti–6Al–4V alloy substrate.

Original languageEnglish
Title of host publicationMaterials Processing Fundamentals, 2019
EditorsSamuel Wagstaff, Antoine Allanore, Guillaume Lambotte, Jonghyun Lee
PublisherSpringer International Publishing
Pages143-152
Number of pages10
ISBN (Print)9783030057275
DOIs
Publication statusPublished - 2019
EventMaterials Processing Fundamentals Symposium held at the TMS Annual Meeting and Exhibition, 2019 - San Antonio, United States
Duration: 10 Mar 201914 Mar 2019

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

ConferenceMaterials Processing Fundamentals Symposium held at the TMS Annual Meeting and Exhibition, 2019
Country/TerritoryUnited States
CitySan Antonio
Period10/03/1914/03/19

Keywords

  • Copper
  • Hardness
  • Microstructure
  • Temperature distribution
  • Ti–6Al–4V alloy
  • Ti–Al–Cu coatings

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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