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Journal of Materials Engineering and Performance

, Volume 27, Issue 1, pp 253–260 | Cite as

The Effect of SiC Addition on Microstructure and Mechanical Properties of Gas Tungsten Arc-Welded Ti-6Al-4V Alloy

  • Demian Langen
  • Hans Jürgen Maier
  • Thomas Hassel
Article
  • 204 Downloads

Abstract

In the present study, SiC powder was added in situ for bead-on-plate weldments and fusion butt joints to modify the microstructure and the corresponding mechanical properties. Cross sections of bead-on-plate welds demonstrated that the SiC addition resulted in significant changes of the titanium microstructure. Specifically, a fine lamellar structure of α-phase with a small amount of intergranular β-titanium within the fusion zone could be established. Moreover, the size of prior β-grains was significantly reduced. After welding, no intermetallic silicides were observed. In the fusion zone of the SiC-enhanced samples, a small increase in hardness resulted, and the samples showed an increase in tensile strength, yield strength and elongation.

Keywords

GTAW mechanical properties microstructure refinement Ti-6Al-4V 

Notes

Acknowledgments

The authors thank the German Research Foundation (DFG) for the funding of this study within the Collaborate Research Center (SFB) 871 “Regeneration of Complex Capital Goods” in sub-project B6 “Arc Welding of Titanium Alloys.”

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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Institut für Werkstoffkunde (Materials Science)Leibniz Universität HannoverGarbsenGermany

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