Microstructure Evolution During Al, Ti, and Mo Surface Deposition and Volume Diffusion in Ni-20Cr Wires and Woven Structures

Cong Wang*, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Ni-20 wt pct Cr wires, as individual wires or within 3D woven structures, are alloyed with Mo, Al, and Ti by gas-phase surface deposition and volume interdiffusion. Mo deposition creates Mo-rich coating and Kirkendall pores. Al + Ti co-deposition creates uniform triple-layered coating. The resulting homogenized and aged Ni-(17.4-19.6)Cr-(1.6-1.8)Al-(2.5-3.6)Ti-(1.5-4.5)Mo(wt pct) wires exhibit γ + γ′ superalloy microstructure. This demonstrates the feasibility of fabricating 3D woven Ni-base structures via gas-phase alloying and heat treatments, into multi-element superalloys with solid-state bonding at wire contacts.

Original languageEnglish (US)
Pages (from-to)2249-2254
Number of pages6
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume46
Issue number5
DOIs
StatePublished - Jan 1 2015

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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