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Effect of Al addition on microstructure and properties of an Fe-B-Al alloy

  • Jiang Ju , Hanguang Fu und Yongping Lei
Veröffentlicht/Copyright: 30. August 2016
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Materials Testing
Aus der Zeitschrift Materials Testing Band 58 Heft 9

Abstract

The Fe-B-Al alloy containing 0 to 10.0 wt.-% Al was melted in a vacuum induction furnace. Effects of the aluminum addition on the microstructure and properties of Fe-B-Al alloys were studied by means of optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), hardness testing and MMG-500 type pin-on-disk high temperature vacuum wear testing. The results showed that the as-casted microstructure of the aluminum-free Fe-B alloy consisted of α-Fe, Fe2(B,C), and Fe23(B,C)6 type borocarbides. However, the as-casted microstructure of the Fe-B-Al alloy consists of a Fe3Al type intermetallic compound when the aluminum content is more than 6.0 wt.-%. Compared with the aluminum-free Fe-B alloy, parts of the borocarbide networks are broken, and the fracture tendency became more obvious with the increase of the aluminum content. Boron is mainly distributed over the borocarbide. Aluminum is mainly distributed over the matrix and Fe3Al type intermetallic compound. Compared with the aluminum-free Fe-B alloy, the addition of a small amount of aluminum reduces slightly the hardness. The hardness gradually increased with the further increasing of the aluminum content. The hardness reached 48.1 HRC when aluminum content was 10.0 wt.-%. The high temperature wear resistance of Fe-B-Al alloy gradually increased with the increase of the aluminum content. When the aluminum content reached 10.0 wt.-%, the high temperature wear resistance of the alloy was the best.

Kurzfassung

Eine Fe-B-Al-Legierung mit 0 bis 10 wt.-% Al wurde in einem Vakuuminduktionsofen verschmolzen. Danach wurden die Auswirkungen der Aluminiumzugabe auf die Mikrostruktur und die Eigenschaften der Legierung mittels Lichtmikroskopie, Rasterelektronenmikroskopie, Röntgendiffraktometrie, EDS, Härtetests und einem Stift-Scheibe-Reibtest der Typs MMG-500 bei hohen Temperaturen und im Vakuum untersucht. Die Ergebnisse zeigen, dass die Mikrostruktur der Aluminium-freien Legierung im Gusszustand aus α-Fe sowie Borcarbiden des Typs Fe2(B,C) und Fe23(B,C)6 bestand. Dem gegenüber bestand die Mikrostruktur im Gusszustand der Fe-B-Al-Legierung aus einer intermetallischen Verbindung des Typs Fe3Al, wenn der Alumniumgehalt mehr als 6 wt.-% betrug. Im Vergleich mit der Aluminium-freien Fe-B-Legierung waren Teile des Borcarbid-Netzwerkes gebrochen und die Bruchtendenz war mit Zunahme des Aluminiumgehalts stärker ausgeprägt. Bor ist hauptsächlich über die Borcarbide verteilt. Aluminium ist hauptsächlich in der Matrix und den intermetallischen Verbindungen des Typs Fe3Al verteilt. Im Vergleich mit der Aluminium-freien Legierung reduziert eine Aluminium-Zugabe in kleinen Mengen geringfügig die Härte. Die Härte nimmt graduell zu mit einer weiteren Aluminium-Zugabe. Die Härte erreicht einen Wert von 48.1 HRC, wenn der Aluminium-Gehalt 10 wt.-% beträgt. Der Hochtemperatur-Verschleißwiderstand der Fe-B-Al-Legierung nimmt graduell mit steigendem Aluminiumgehalt zu. Bei einem Alumniumgehalt von 10 wt.-% war der Hochtemperatur-Verschleißwiderstand am besten.

*Correspondence Address, Dr. Hanguang Fu, School of Materials Science and Engineering, Beijing University of Technology, Number 100, Pingle Garden, Chaoyang District, Beijing 100124, P. R. China, E-mail:

Jiang Ju, born in 1990, is a master candidate at Beijing University of Technology, China. He obtained his Bachelor degree at the School of Construction Machinery of Shandong Jiaotong University, China in 2013. His research interests mainly focus on wear-resistant alloy materials.

Dr. Hanguang Fu, born in 1964, is a researcher at Beijing University of Technology, China. He obtained his PhD at the School of Materials Science and Engineering at Xi'an Jiaotong University, China in 2004. His research interests mainly focus on solidification control. By now, he has published over 100 technical papers and holds more than 80 invention patents in China.

Prof. Dr. Yongping Lei, born in 1957, is Professor at Beijing University of Technology, China. He obtained his PhD at the School of Materials Science and Engineering at Xi'an Jiaotong University, China in 1994. His research interests mainly focus on the development of lead-free solder paste, the reliability of solder joint and welding. By now, he has published over 100 technical papers and holds more than 50 invention patents in China.

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Published Online: 2016-08-30
Published in Print: 2016-09-07

© 2016, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Application of micro-magnetic testing systems for non-destructive analysis of wear progress in case-hardened 16MnCr5 gear wheels
  5. Weldability of duplex stainless steels with and without Cu/Ni interlayer using plasma arc welding
  6. TIG deposition of Ti on steel substrates using Cu as interlayer
  7. Examinations of casting cracks in a high alloy steel valve
  8. Analyzing the diffusion weldability of copper and porcelain
  9. Torsional behavior of a friction welded martensitic stainless steel
  10. Effects of different wire chemical compositions on the mechanical and microstructural characteristics of copper brazing joints
  11. Effect of Al addition on microstructure and properties of an Fe-B-Al alloy
  12. Inspection of domestic nuclear fuel rods using neutron radiography at the Tehran Research Reactor
  13. Strain measurement in concrete using embedded carbon roving-based sensors
  14. Wear behavior of multilayer coated carbide tools in finish dry hard turning
  15. Characteristics of austenitic stainless steel T-joints welded using the DMAG process with solid wire
  16. Application of the Taguchi method for surface roughness predictions in the turning process
  17. Experimental failure testing and repair of internal pressurized composite pipes using different fracture models
  18. Investigation of material removal rate (MRR) and wire wear ratio (WWR) for alloy Ti6Al4 V exposed to heat treatment processing in WEDM and optimization of parameters using Grey relational analysis
https://doi.org/10.3139/120.110912

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Application of micro-magnetic testing systems for non-destructive analysis of wear progress in case-hardened 16MnCr5 gear wheels
  5. Weldability of duplex stainless steels with and without Cu/Ni interlayer using plasma arc welding
  6. TIG deposition of Ti on steel substrates using Cu as interlayer
  7. Examinations of casting cracks in a high alloy steel valve
  8. Analyzing the diffusion weldability of copper and porcelain
  9. Torsional behavior of a friction welded martensitic stainless steel
  10. Effects of different wire chemical compositions on the mechanical and microstructural characteristics of copper brazing joints
  11. Effect of Al addition on microstructure and properties of an Fe-B-Al alloy
  12. Inspection of domestic nuclear fuel rods using neutron radiography at the Tehran Research Reactor
  13. Strain measurement in concrete using embedded carbon roving-based sensors
  14. Wear behavior of multilayer coated carbide tools in finish dry hard turning
  15. Characteristics of austenitic stainless steel T-joints welded using the DMAG process with solid wire
  16. Application of the Taguchi method for surface roughness predictions in the turning process
  17. Experimental failure testing and repair of internal pressurized composite pipes using different fracture models
  18. Investigation of material removal rate (MRR) and wire wear ratio (WWR) for alloy Ti6Al4 V exposed to heat treatment processing in WEDM and optimization of parameters using Grey relational analysis
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