Shear strength/microstructure relationship for dissimilar IN738/IN718 TLP joints

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Abstract

MBF20 interlayer, as a commercial foil, was used for TLP bonding of IN738/MBF20/IN718 system at different temperatures and times. Microhardness and shear strength tests were conducted for all the samples. Hardness profile across the joints made at 1050 and 1100 °C revealed the microstructure regions as isothermal solidification zone (ISZ), athermal solidification zone (ASZ), and diffusion affected zone (DAZ). With increasing bonding time at each temperature, hardness peak at the joint centerline was removed but the hardness peak at DAZ remained. Increase of joint’s shear strength, increase of ISZ hardness, and decrease of DAZ hardness with increasing bonding temperature and/or time were discussed according to the effect of Larson-Miller parameter. Partial liquation of the base metals at 1150 °C/60 min condition caused reverse trend for variation of hardness and joint’s strength with bonding temperature. Fracture path of the joints with incomplete isothermal solidification was seen through the centerline eutectics. This path for the joints with complete isothermal solidification was observed through the bonding zone and the DAZ phases.

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  • 06 January 2021

    The original version of this article unfortunately contained a mistake.

References

  1. 1.

    Rivaux B, Cao X, Jahazi M, Cuddy J, Birur A (2009) Effect of pre- and post-weld heat treatment on metallurgical and tensile properties of Inconel 718 alloy butt joints welded using 4 kW Nd:YAG laser. J Mater Sci 44:4557–4571

    Article  Google Scholar 

  2. 2.

    Sajjadi SA, Nategh S, Gutherie IL (2002) Study of microstructure and mechanical properties of high perormnce Ni-base superalloy GTD-111. Mater Sci Eng A 325:484–489

    Article  Google Scholar 

  3. 3.

    Idowu OA, Ojo OA, Chaturvedi MC (2006) Microstructure study of transient liquid phase bonded cast Inconel 738LC superalloy. Metall Mater Trans A 37A:2787–2796

    CAS  Article  Google Scholar 

  4. 4.

    Ojo OA (2004) On liquation cracking of cast Inconel 738LC superalloy welds, Ph.D. Dissertation, University of Manitoba, Canada

  5. 5.

    Pouranvari M, Ekrami A, Kokabi A (2013) Transient liquid phase bonding of wrought IN718 nickel based superalloy using standard heat treatment cycles: microstructure and mechanical properties. Mater Des 50:694–701

    CAS  Article  Google Scholar 

  6. 6.

    Rabinkin A (2004) Brazing with (NiCoCr)-B-Si amorphous brazing filler metals: alloys, processing, joint structure, properties, applications. Sci Technol Weld Join 9:181–199

    CAS  Article  Google Scholar 

  7. 7.

    Wikstrom NP, Egbewande AT, Ojo OA (2008) High temperature diffusioninduced liquid phase joining of a heat resistant alloy. J Alloys Compd 460:379–385

    CAS  Article  Google Scholar 

  8. 8.

    Pouranvari M, Ekrami A, Kokabi AH (2008) Microstructure–properties relationship of TLP-bonded GTD-111 nickel-base superalloy. Mater Sci Eng A 490:229–234

    Article  Google Scholar 

  9. 9.

    Abbasi Khazaei B, Jahanbakhsh A, Bakhtiari R (2016) TLP bonding of dissimilar FSX414/IN738 system with MBF80 interlayer: the effect of homogenizing treatment on microstructure and mechanical properties. Mater Sci Eng A 651:93–101

    CAS  Article  Google Scholar 

  10. 10.

    High performance brazing filler metal. http://www.metglas.com

  11. 11.

    Yarmou Shamsabadi A, Bakhtiari R, Eisaabadi B. G (2016) TLP bonding of IN738/MBF20/IN718 system. J Alloys Compd 685:896–904

    Article  Google Scholar 

  12. 12.

    Bakhtiari R, Ekrami A, Khan TI (2015) Microstructure-mechanical properties relation of TLP-bonded FSX-414 superalloy: effect of homogenization design. J Mater Eng Perform 24:1687–1696

    CAS  Article  Google Scholar 

  13. 13.

    Bakhtiari R, Ekrami A, Khan TI (2012) The effect of TLP bonding temperature on microstructural and mechanical property of joints made using FSX-414 superalloy. Mater Sci Eng A 546:291–300

    CAS  Article  Google Scholar 

  14. 14.

    Yang YH, Xie YJ, Wang MS, Ye W (2013) Microstructure and tensile properties of nickel-based superalloy K417G bonded using transient liquid-phase infiltration. Mater Des 51:141–147

    CAS  Article  Google Scholar 

  15. 15.

    Venkadesan S, Bhaduri AK, Rodriguez P, Padmanabhan KA (1992) Effect of ageing on the microstructural stability of cold-worked titanium-modified 15Cr-15Ni—2.5 Mo austenitic stainless steel. J Nucl Mater 186:177–184

    CAS  Article  Google Scholar 

  16. 16.

    Moosavy HN, Aboutalebi MR, Seyedein SH, Mapelli C (2013) Microstructural, mechanical and weldability assessments of the dissimilar welds between γ’-and γ″ -strengthened nickel-base superalloys. Mater Charact 82:41–49

    Article  Google Scholar 

  17. 17.

    Kozar RW, Suzuki A, Milligan WW, Schirra JJ, Savage MF, Pollock TM (2009) Strengthening mechanisms in polycrystalline multimodal nickel-base superalloys. Metall Mater Trans A 40:1588–1603

    Article  Google Scholar 

  18. 18.

    Gypen LA, Deruytter A (1977) Multi-component solid solution hardening. J Mater Sci 12:1028–1033

    CAS  Article  Google Scholar 

  19. 19.

    Roth HA, Davis CL, Thomson RC (1997) Modeling solid solution strengthening in nickel alloys. Metall Mater Trans A 28:1329–1335

    Article  Google Scholar 

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Acknowledgments

The author would like to acknowledge Kermanshah Branch of Azad University for financial supports of this research.

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Correspondence to R. Bakhtiari.

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Highlights

• Mechanical properties of TLP joints for IN-738/MBF-20/IN-718 system.

• Increase of joint’s shear strength and hardness with increasing bonding temperature.

• Discussion of this trend according to the effect of Larsson-Miller parameter.

• Reverse trend for variation of joint’s strength and hardness at 1150 °C.

• Shear fracture path of the joints through the bonding zone and the DAZ phases.

Recommended for publication by Commission XVII - Brazing, Soldering and Diffusion Bonding

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Bakhtiari, R., Yarmou Shamsabadi, A. & Alipour Moradi, K. Shear strength/microstructure relationship for dissimilar IN738/IN718 TLP joints. Weld World 64, 219–231 (2020). https://doi.org/10.1007/s40194-019-00808-y

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Keywords

  • TLP bonding
  • IN718 superalloy
  • IN738 superalloy
  • MBF20 interlayer
  • Mechanical properties