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Structure and Performance of Nanoparticle Improved Ferrous Alloys

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (10 June 2023) | Viewed by 2851

Special Issue Editor

National Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
Interests: metal matrix composite; Fe-based alloys; light alloys; microstructure and mechanical performance; grain refinement; corrosion and protection
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Special Issue Information

Dear Colleagues,

Ferrous alloys, particularly steels, are currently the most widely used structural materials due to their high mechanical performance, abundance and reasonable prices. Due to the progressive development of modern industry, more advanced requirements are being imposed upon the performance of ferrous alloys. The increasing demand for high-strength ferrous alloys that also maintain high plasticity, toughness and heat/corrosion/fatigue resistance for automotive, aerospace, marine, military and industrial applications has given great impetus to scientific research on high-performance ferrous alloys. In recent years, nanoparticle-enabled methodologies have emerged to overcome the limitations of conventional metallurgical approaches and revolutionize metal processing and manufacturing technologies, providing a novel avenue to significantly improve the performance of ferrous alloys. It is well documented that in situ and ex situ nanoparticles can be employed to tailor materials, incorporating controllable nano/micro-structures with unique physical/chemical/mechanical properties. An in-depth understanding of nanoparticle-induced evolution mechanisms of structure and performance of ferrous alloys can lay a scientific foundation for the development of high-performance ferrous alloys.

This Special Issue aims to cover a wide range of subjects related to the structure and performance of nanoparticle-improved ferrous alloys. It will emphasise resolving the issue of how nanoparticles can be utilized to tailor the nano/micro-structures and physical/chemical/mechanical behaviours of ferrous alloys.

Potential topics include, but are not limited to:

  • Design and modelling of Fe-based alloys containing nanoparticles.
  • Phase diagrams of ferrous alloys with nanoparticles.
  • Nanoparticle incorporation, formation and distribution in Fe-based alloys.
  • Nanoparticle interactions with ferrous alloy melt and solidification fronts.
  • Nanoparticle-induced micro/nano-structure evolution of Fe-based alloys.
  • Nanoparticle effects on the physical/chemical/mechanical properties of Fe-based alloys.
  • Additive manufacturing of Fe-based alloys with nanoparticles.
  • Processing of Fe-based alloy powders containing nanoparticles.
  • High-energy beam interactions with Fe-based alloys containing nanoparticles.

Dr. Kui Wang
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanoparticle
  • ferrous alloys
  • Fe matrix composites
  • structure and properties of materials
  • materials characterization
  • materials design and synthesis
  • materials processing and manufacturing

Published Papers (2 papers)

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Research

14 pages, 19225 KiB  
Article
Effects of Mo Particles Addition on the Microstructure and Properties of 316 L Stainless Steels Fabricated by Laser Powder Bed Fusion
by Bolin Li, Shuai Zhang, Shenghai Wang, Li Wang, Yinchuan He, Yaning Cui, Dan Liu and Mingxu Wang
Materials 2023, 16(13), 4827; https://doi.org/10.3390/ma16134827 - 05 Jul 2023
Viewed by 1104
Abstract
Application of the 316 L stainless steel (SS) is limited by its relatively low wear resistance, insufficient strength, and poor corrosion resistance in special environments. To this end, effects of Mo particles addition on the microstructure, mechanical properties, and corrosion resistance of the [...] Read more.
Application of the 316 L stainless steel (SS) is limited by its relatively low wear resistance, insufficient strength, and poor corrosion resistance in special environments. To this end, effects of Mo particles addition on the microstructure, mechanical properties, and corrosion resistance of the laser powder bed fusion (LPBF) 316 L SS are investigated in this study. The results show that the addition of Mo particles from 0 wt.% to 10 wt.% can modify the crystal orientation and improve the strength, wear resistance, and corrosion resistance of LPBF 316 L SSs. Particularly, the LPBF 316 L SS forms a biphasic structure with a similar ratio of α-Fe to γ-Fe with 5 wt.% Mo addition. As a result, the corresponding samples possess both the excellent toughness of austenitic SSs and the high strength and corrosion resistance of ferrite SSs, which reaches a high tensile strength of about 830 MPa, together with a low friction coefficient of 0.421 μ. Since the Mo particles addition is beneficial to increase the content of Cr2O3 on the samples surface from 13.48% to 22.68%, the corrosion current density of 316 L SS decreases by two orders of magnitude from 569 nA to 6 nA, while the mechanical properties remain favorable. This study is expected to serve as a reference for the preparation of LPBF SSs with excellent integrated performance. Full article
(This article belongs to the Special Issue Structure and Performance of Nanoparticle Improved Ferrous Alloys)
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11 pages, 5622 KiB  
Article
Effects of the Gas-Atomization Pressure and Annealing Temperature on the Microstructure and Performance of FeSiBCuNb Nanocrystalline Soft Magnetic Composites
by Guanzhi Li, Guibing Shi, Hongyi Miao, Dan Liu, Zongzhen Li, Mingxu Wang and Li Wang
Materials 2023, 16(3), 1284; https://doi.org/10.3390/ma16031284 - 02 Feb 2023
Cited by 3 | Viewed by 1286
Abstract
FeSiBCuNb powders prepared by the gas atomization method generally exhibit a wide particle size distribution and a high degree of sphericity. In addition, the correspondingly prepared nanocrystalline soft magnetic composites (NSMCs) perform good service stability. In this paper, effects of the gas-atomization pressure [...] Read more.
FeSiBCuNb powders prepared by the gas atomization method generally exhibit a wide particle size distribution and a high degree of sphericity. In addition, the correspondingly prepared nanocrystalline soft magnetic composites (NSMCs) perform good service stability. In this paper, effects of the gas-atomization pressure and annealing temperature on the microstructure and soft magnetic properties of FeSiBCuNb powders and NSMCs are investigated. The results show that the powders obtained by a higher gas-atomization pressure possess a larger amorphous ratio and a smaller average crystallite size, which contribute to the better soft magnetic performance of the NSMCs. After being annealed at 550 °C for 60 min, the NSMCs show a much better performance than those treated by the stress-relief annealing process under 300 °C, which indicates that the optimization of the soft magnetic properties resulting from the precipitation of the α-Fe(Si) nanocrystalline largely overwhelms the deterioration caused by the grain growth of the pre-existing crystals. In addition, the annealed NSMCs prepared by the powders with the gas-atomization pressure of 4 MPa show the best performance in this work, μe = 33.32 (f = 100 kHz), Hc = 73.08 A/m and Pcv = 33.242 mW/cm3 (f = 100 kHz, Bm = 20 mT, sine wave). Full article
(This article belongs to the Special Issue Structure and Performance of Nanoparticle Improved Ferrous Alloys)
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