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Effect of the bonding time on the microstructure and mechanical properties of a transient-liquid-phase bonded in718 using a Ni-Cr-B filler alloy

Pouranvari, M ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. Publisher: 2013
  3. Abstract:
  4. The paper aims at addressing the effect of the bonding time on the metallurgical and mechanical properties of a transient-liquid-phase (TLP) bonded IN718 nickel-based superalloy using an Ni-15.2Cr-4B (%) amorphous filler alloy. The results showed that after a partial isothermal solidification, the residual liquid in the joint centerline transformed, during the cooling, to non-equilibrium eutectic-type microconstituents composed of Ni-rich boride, Cr-rich boride and eutectic γ-solid solution phase. The complete isothermal solidification which resulted in a formation of an intermetallic-free joint centerline occurred after a holding period 40 min at the bonding temperature of 1100 °C. An increase in the bonding time improved the joint shear strength due to a decrease in the width of the eutectic-type microconstituents in the joint centerline
  5. Keywords:
  6. Mechanical properties ; Solidification ; Superalloy ; Transient-liquid-phase bonding
  7. Source: Materiali in Tehnologije ; Volume 47, Issue 5 , 2013 , Pages 593-599 ; 15802949 (ISSN)
  8. URL: http://mit.imt.si/Revija/izvodi/mit135/pouranvari.pdf