Solid silver embrittlement of Ti-6Al-2Sn-4Zr-2Mo alloy

J. Qing, D. C. Van Aken, M. F. Buchely, M. Walker, R. Juusola, J. Goethe

Research output: Contribution to book or proceedingConference articlepeer-review

Abstract

Embrittlement of Ti alloy due to surface contact with solid silver metal was reported. Tensile failure of Ti-6Al-2Sn-4Zr-2Mo alloy in contact with silver was investigated at 450oC and 500oC in this study. Experiments were designed and performed to obtain lifetime/stress/temperature curves for Ti-6-2-4-2 alloy. The transverse and the longitudinal rolling directions of Ti alloy were compared. High purity silver was pressed against the Ti specimen using two steel plates clamped with two bolts. Effect of the torque applied on two bolts on failure time was studied. Intergranular grain boundary decohesion was observed next to the silver contact side on the fracture surface, indicating brittle failure of the Ti-6-2-4-2 alloy. Microvoids observed in the area away from silver contact side on the fracture surface indicate ductile failure of the alloy. Silver was found on the facture surface of specimen after failure using energy dispersive X-ray (EDX).

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
PublisherAssociation for Iron and Steel Technology, AISTECH
Pages28-36
Number of pages9
ISBN (Electronic)9781510850583
DOIs
StatePublished - 2017
EventMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017 - Pittsburgh, United States
Duration: Oct 8 2017Oct 12 2017

Publication series

NameMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
Volume1

Conference

ConferenceMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
Country/TerritoryUnited States
CityPittsburgh
Period10/8/1710/12/17

Keywords

  • Lifetime/stress/temperature curves
  • Silver
  • Solid metal embrittlement
  • Titanium alloy

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