Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure
Joining of Cu-based dispersion-strengthened alloys to Ni-based superalloys has garnered increased attention for liquid rocket engine applications due to the high thermal conductivity of Cu-based alloys and high temperature tensile strength of Ni-based superalloys. However, such joints can suffer fro...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| Online Access: | https://www.mdpi.com/2504-4494/8/1/42 |
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| author | Jakub Preis Donghua Xu Brian K. Paul Peter A. Eschbach Somayeh Pasebani |
| author_facet | Jakub Preis Donghua Xu Brian K. Paul Peter A. Eschbach Somayeh Pasebani |
| author_sort | Jakub Preis |
| collection | DOAJ |
| description | Joining of Cu-based dispersion-strengthened alloys to Ni-based superalloys has garnered increased attention for liquid rocket engine applications due to the high thermal conductivity of Cu-based alloys and high temperature tensile strength of Ni-based superalloys. However, such joints can suffer from cracking when joined via liquid state processes, leading to part failure. In this work, compositions of 15–95 wt.% GRCop42 are alloyed with Inconel 625 and characterized to better understand the root cause of cracking. Results indicate a lack of miscibility between Cu-deprived and Cu-rich liquids in compositions corresponding to 30–95 wt.% GRCop42. Two distinct morphologies are observed and explained by use of CALPHAD; Cu-deprived dendrites with Cu-rich interdendritic zones at 30–50 wt.% GRCop42 and Cu-deprived spheres surrounded by a Cu-rich matrix at 60–95 wt.% GRCop42. Phase analysis reveals brittle intermetallic phases precipitate in the 60–95 wt.% GRCop42 Cu-deprived region. Three cracking mechanisms are proposed herein that provide guidance on the avoidance of defects Ni-based superalloy to Cu-based dispersion strengthened alloy joints. |
| first_indexed | 2024-03-07T22:25:53Z |
| format | Article |
| id | doaj.art-932f194a006649e4aa155d9d442afa86 |
| institution | Directory Open Access Journal |
| issn | 2504-4494 |
| language | English |
| last_indexed | 2024-03-07T22:25:53Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj.art-932f194a006649e4aa155d9d442afa862024-02-23T15:22:56ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942024-02-01814210.3390/jmmp8010042Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition MicrostructureJakub Preis0Donghua Xu1Brian K. Paul2Peter A. Eschbach3Somayeh Pasebani4School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97330, USASchool of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97330, USASchool of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97330, USAElectron Microscopy Facility, Oregon State University, Corvallis, OR 97330, USASchool of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University, Corvallis, OR 97330, USAJoining of Cu-based dispersion-strengthened alloys to Ni-based superalloys has garnered increased attention for liquid rocket engine applications due to the high thermal conductivity of Cu-based alloys and high temperature tensile strength of Ni-based superalloys. However, such joints can suffer from cracking when joined via liquid state processes, leading to part failure. In this work, compositions of 15–95 wt.% GRCop42 are alloyed with Inconel 625 and characterized to better understand the root cause of cracking. Results indicate a lack of miscibility between Cu-deprived and Cu-rich liquids in compositions corresponding to 30–95 wt.% GRCop42. Two distinct morphologies are observed and explained by use of CALPHAD; Cu-deprived dendrites with Cu-rich interdendritic zones at 30–50 wt.% GRCop42 and Cu-deprived spheres surrounded by a Cu-rich matrix at 60–95 wt.% GRCop42. Phase analysis reveals brittle intermetallic phases precipitate in the 60–95 wt.% GRCop42 Cu-deprived region. Three cracking mechanisms are proposed herein that provide guidance on the avoidance of defects Ni-based superalloy to Cu-based dispersion strengthened alloy joints.https://www.mdpi.com/2504-4494/8/1/42dissimlar metal joiningInconel 625GRCop42crackingliquid miscibility gap |
| spellingShingle | Jakub Preis Donghua Xu Brian K. Paul Peter A. Eschbach Somayeh Pasebani Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure Journal of Manufacturing and Materials Processing dissimlar metal joining Inconel 625 GRCop42 cracking liquid miscibility gap |
| title | Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure |
| title_full | Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure |
| title_fullStr | Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure |
| title_full_unstemmed | Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure |
| title_short | Effect of Liquid Miscibility Gap on Defects in Inconel 625–GRCop42 Joints through Analysis of Gradient Composition Microstructure |
| title_sort | effect of liquid miscibility gap on defects in inconel 625 grcop42 joints through analysis of gradient composition microstructure |
| topic | dissimlar metal joining Inconel 625 GRCop42 cracking liquid miscibility gap |
| url | https://www.mdpi.com/2504-4494/8/1/42 |
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