Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction
The study of liquid metal embrittlement in Fe–Zn systems is challenging because of the high temperature and vapor pressure of Zn, which hinders in-situ investigations with sufficiently high spatial resolution. This is typically associated with subsecond processing steps and the coexistence of a soli...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-06-01
|
| Series: | Materials Today Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590049823000280 |
| _version_ | 1797796313635487744 |
|---|---|
| author | Seung-Chang Han Dario Ferreira Sanchez Daniel Grolimund Sang-Ho Uhm Du-Youl Choi Hong-Chul Jeong Tea-Sung Jun |
| author_facet | Seung-Chang Han Dario Ferreira Sanchez Daniel Grolimund Sang-Ho Uhm Du-Youl Choi Hong-Chul Jeong Tea-Sung Jun |
| author_sort | Seung-Chang Han |
| collection | DOAJ |
| description | The study of liquid metal embrittlement in Fe–Zn systems is challenging because of the high temperature and vapor pressure of Zn, which hinders in-situ investigations with sufficiently high spatial resolution. This is typically associated with subsecond processing steps and the coexistence of a solid substrate and a liquid Zn phase, which renders direct observations at the microstructural scale difficult. In this study, we comprehensively investigate the reactions occurring during the rapid heating and cooling stages of Fe–Zn systems using synchrotron X-ray diffraction. The phase transformation is analyzed for specimens with different interfacial structures, with focus on changes in the coating microstructure above and below the peritectic temperature (782 °C) of the Fe–Zn system. Advanced high-strength steel (AHSS) variants with 1.5 wt% Si content show a prominent destabilizing effect at the onset of Fe–Zn intermetallic compound formation and a simultaneous deceleration of the liquid Zn depletion rate compared with other AHSS alloys containing 0 wt% Si. Furthermore, the addition of Si suppresses the formation of the Γ phase, which is due to turbulence in the outburst Zn at temperatures above 773 K. Consequently, the fraction of Γ phase compounds with accumulated Zn deceases as the exposure time of the liquid Zn to the ferritic matrix increases owing to the solute redistribution of Si in the liquid Zn during rapid heating. Meanwhile, the absence of silicon in the substrate causes the formation of a ζ phase with a low melting point, which delays the formation of liquid Zn via an increase in the melting point of the Zn layer in the early stage of heating. Additionally, the amount of residual liquid Zn decreases due to the rapid depletion of Zn during the liquid initiation stage via an equilibrium Fe/Zn binary phase transformation. The results of this study provide a deeper understanding of the Fe–Zn intermetallic phase transformation and the sensitivity to liquid metal embrittlement of third-generation AHSSs based on silicon content. |
| first_indexed | 2024-03-13T03:32:13Z |
| format | Article |
| id | doaj.art-42630f79517846c78df9a188b0dea920 |
| institution | Directory Open Access Journal |
| issn | 2590-0498 |
| language | English |
| last_indexed | 2024-03-13T03:32:13Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials Today Advances |
| spelling | doaj.art-42630f79517846c78df9a188b0dea9202023-06-24T05:18:52ZengElsevierMaterials Today Advances2590-04982023-06-0118100368Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reactionSeung-Chang Han0Dario Ferreira Sanchez1Daniel Grolimund2Sang-Ho Uhm3Du-Youl Choi4Hong-Chul Jeong5Tea-Sung Jun6Department of Mechanical Engineering, Incheon National University, Incheon, 22012, Republic of KoreaSwiss Light Source, Paul Scherrer Institut, CH-5232, Villigen PSI, SwitzerlandSwiss Light Source, Paul Scherrer Institut, CH-5232, Villigen PSI, SwitzerlandWelding and Joining Research Group, Steel Solution Marketing Department, POSCO, Incheon, 21985, Republic of KoreaWelding and Joining Research Group, Steel Solution Marketing Department, POSCO, Incheon, 21985, Republic of KoreaWelding and Joining Research Group, Steel Solution Marketing Department, POSCO, Incheon, 21985, Republic of KoreaDepartment of Mechanical Engineering, Incheon National University, Incheon, 22012, Republic of Korea; Research Institute for Engineering and Technology, Incheon National University, Incheon, 22012, Republic of Korea; Corresponding author. Department of Mechanical Engineering, Incheon National University, Incheon, 22012, Republic of Korea.The study of liquid metal embrittlement in Fe–Zn systems is challenging because of the high temperature and vapor pressure of Zn, which hinders in-situ investigations with sufficiently high spatial resolution. This is typically associated with subsecond processing steps and the coexistence of a solid substrate and a liquid Zn phase, which renders direct observations at the microstructural scale difficult. In this study, we comprehensively investigate the reactions occurring during the rapid heating and cooling stages of Fe–Zn systems using synchrotron X-ray diffraction. The phase transformation is analyzed for specimens with different interfacial structures, with focus on changes in the coating microstructure above and below the peritectic temperature (782 °C) of the Fe–Zn system. Advanced high-strength steel (AHSS) variants with 1.5 wt% Si content show a prominent destabilizing effect at the onset of Fe–Zn intermetallic compound formation and a simultaneous deceleration of the liquid Zn depletion rate compared with other AHSS alloys containing 0 wt% Si. Furthermore, the addition of Si suppresses the formation of the Γ phase, which is due to turbulence in the outburst Zn at temperatures above 773 K. Consequently, the fraction of Γ phase compounds with accumulated Zn deceases as the exposure time of the liquid Zn to the ferritic matrix increases owing to the solute redistribution of Si in the liquid Zn during rapid heating. Meanwhile, the absence of silicon in the substrate causes the formation of a ζ phase with a low melting point, which delays the formation of liquid Zn via an increase in the melting point of the Zn layer in the early stage of heating. Additionally, the amount of residual liquid Zn decreases due to the rapid depletion of Zn during the liquid initiation stage via an equilibrium Fe/Zn binary phase transformation. The results of this study provide a deeper understanding of the Fe–Zn intermetallic phase transformation and the sensitivity to liquid metal embrittlement of third-generation AHSSs based on silicon content.http://www.sciencedirect.com/science/article/pii/S2590049823000280In-situ synchrotron XRDAdvanced high strength steelAlloying elementsZn coatingFe–Zn reactionIntermetallic phase |
| spellingShingle | Seung-Chang Han Dario Ferreira Sanchez Daniel Grolimund Sang-Ho Uhm Du-Youl Choi Hong-Chul Jeong Tea-Sung Jun Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction Materials Today Advances In-situ synchrotron XRD Advanced high strength steel Alloying elements Zn coating Fe–Zn reaction Intermetallic phase |
| title | Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction |
| title_full | Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction |
| title_fullStr | Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction |
| title_full_unstemmed | Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction |
| title_short | Role of silicon on formation and growth of intermetallic phases during rapid Fe–Zn alloying reaction |
| title_sort | role of silicon on formation and growth of intermetallic phases during rapid fe zn alloying reaction |
| topic | In-situ synchrotron XRD Advanced high strength steel Alloying elements Zn coating Fe–Zn reaction Intermetallic phase |
| url | http://www.sciencedirect.com/science/article/pii/S2590049823000280 |
| work_keys_str_mv | AT seungchanghan roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT darioferreirasanchez roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT danielgrolimund roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT sanghouhm roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT duyoulchoi roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT hongchuljeong roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction AT teasungjun roleofsilicononformationandgrowthofintermetallicphasesduringrapidfeznalloyingreaction |