Interface microstructure and strength of TLP bonded iron and steel

Esfakur Rahman, M. N. Cavalli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Commercially pure iron (Fe) and stainless steel 321 (SS 321) were transient liquid phase (TLP) diffusion bonded using Cu and/or Au-12Ge interlayers. The joining pressures, temperatures and times were investigated. Au atoms appeared to diffuse back at the joining interface during slow cooling from the joining temperature. A faster cooling method prevented the back-diffusion of Au atoms from interior to the joining interface. Residual interlayer disappeared when faster cooling methods such as air cooling, water cooling or water quenching were applied. However, microcracks appeared in the joint centerline if water cooling or quenching was applied. Au-rich particles also appeared in the joint microstructure. No microcracks appeared for the samples cooled in air from the bonding temperature. The highest strength of the TLP diffusion bonded Fe reached almost same as the normalized Fe. The maximum tensile strengths (UTS) obtained for the bonded Fe were 291 ± 2 MPa using a Cu interlayer and 315 ± 4 MPa. The maximum strength found was 387 ± 4 MPa for TLP diffusion bonded steel using an Au-12Ge interlayer. The maximum strength for steel was obtained for the samples bonded at 1050 ºC for 20 h in vacuum and cooled in air. The maximum strength found was 387 ± 4 MPa which is 70.4 % of the base alloy strength.

Original languageEnglish (US)
Title of host publicationExperimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
EditorsJohn Considine, Cesar Sciammarella, Paul Gloeckner
PublisherSpringer New York LLC
Pages191-199
Number of pages9
ISBN (Print)9783319224480
DOIs
StatePublished - Jan 1 2016
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015 - Costa Mesa, United States
Duration: Jun 8 2015Jun 11 2015

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume4
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

OtherSEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015
CountryUnited States
CityCosta Mesa
Period6/8/156/11/15

Fingerprint

Joining
Iron
Cooling
Microstructure
Steel
Liquids
Microcracks
Cooling water
Quenching
Air
Atoms
Temperature
Tensile strength
Stainless steel
Vacuum
Water

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Rahman, E., & Cavalli, M. N. (2016). Interface microstructure and strength of TLP bonded iron and steel. In J. Considine, C. Sciammarella, & P. Gloeckner (Eds.), Experimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics (pp. 191-199). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4). Springer New York LLC. https://doi.org/10.1007/978-3-319-22449-7_23
Rahman, Esfakur ; Cavalli, M. N. / Interface microstructure and strength of TLP bonded iron and steel. Experimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics. editor / John Considine ; Cesar Sciammarella ; Paul Gloeckner. Springer New York LLC, 2016. pp. 191-199 (Conference Proceedings of the Society for Experimental Mechanics Series).
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abstract = "Commercially pure iron (Fe) and stainless steel 321 (SS 321) were transient liquid phase (TLP) diffusion bonded using Cu and/or Au-12Ge interlayers. The joining pressures, temperatures and times were investigated. Au atoms appeared to diffuse back at the joining interface during slow cooling from the joining temperature. A faster cooling method prevented the back-diffusion of Au atoms from interior to the joining interface. Residual interlayer disappeared when faster cooling methods such as air cooling, water cooling or water quenching were applied. However, microcracks appeared in the joint centerline if water cooling or quenching was applied. Au-rich particles also appeared in the joint microstructure. No microcracks appeared for the samples cooled in air from the bonding temperature. The highest strength of the TLP diffusion bonded Fe reached almost same as the normalized Fe. The maximum tensile strengths (UTS) obtained for the bonded Fe were 291 ± 2 MPa using a Cu interlayer and 315 ± 4 MPa. The maximum strength found was 387 ± 4 MPa for TLP diffusion bonded steel using an Au-12Ge interlayer. The maximum strength for steel was obtained for the samples bonded at 1050 ºC for 20 h in vacuum and cooled in air. The maximum strength found was 387 ± 4 MPa which is 70.4 {\%} of the base alloy strength.",
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Rahman, E & Cavalli, MN 2016, Interface microstructure and strength of TLP bonded iron and steel. in J Considine, C Sciammarella & P Gloeckner (eds), Experimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics. Conference Proceedings of the Society for Experimental Mechanics Series, vol. 4, Springer New York LLC, pp. 191-199, SEM Annual Conference and Exposition on Experimental and Applied Mechanics, 2015, Costa Mesa, United States, 6/8/15. https://doi.org/10.1007/978-3-319-22449-7_23

Interface microstructure and strength of TLP bonded iron and steel. / Rahman, Esfakur; Cavalli, M. N.

Experimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics. ed. / John Considine; Cesar Sciammarella; Paul Gloeckner. Springer New York LLC, 2016. p. 191-199 (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Commercially pure iron (Fe) and stainless steel 321 (SS 321) were transient liquid phase (TLP) diffusion bonded using Cu and/or Au-12Ge interlayers. The joining pressures, temperatures and times were investigated. Au atoms appeared to diffuse back at the joining interface during slow cooling from the joining temperature. A faster cooling method prevented the back-diffusion of Au atoms from interior to the joining interface. Residual interlayer disappeared when faster cooling methods such as air cooling, water cooling or water quenching were applied. However, microcracks appeared in the joint centerline if water cooling or quenching was applied. Au-rich particles also appeared in the joint microstructure. No microcracks appeared for the samples cooled in air from the bonding temperature. The highest strength of the TLP diffusion bonded Fe reached almost same as the normalized Fe. The maximum tensile strengths (UTS) obtained for the bonded Fe were 291 ± 2 MPa using a Cu interlayer and 315 ± 4 MPa. The maximum strength found was 387 ± 4 MPa for TLP diffusion bonded steel using an Au-12Ge interlayer. The maximum strength for steel was obtained for the samples bonded at 1050 ºC for 20 h in vacuum and cooled in air. The maximum strength found was 387 ± 4 MPa which is 70.4 % of the base alloy strength.

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Rahman E, Cavalli MN. Interface microstructure and strength of TLP bonded iron and steel. In Considine J, Sciammarella C, Gloeckner P, editors, Experimental and Applied Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics. Springer New York LLC. 2016. p. 191-199. (Conference Proceedings of the Society for Experimental Mechanics Series). https://doi.org/10.1007/978-3-319-22449-7_23