Effect of Various Spheroidizing Methods on Microstructure–Mechanical Properties and Wear Performance of PM High-Carbon Steel

Gökmeşe, Hakan; Karadağ, Hakan Burak; Taşdöğen, Hacer

doi:10.1007/s12666-021-02450-z

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…2 (c)). SUJ2 steel and other hypereutectoid steels are industrially subjected to similar sequential heat treatment to the one in this study, i.e., solution treatment, spheroidizing for carbide particles, quenching and tempering [15][16][17][18][19] . Note that as a unique point in the present treatment is that we focus on controlling Cr behavior: enrichment in the θ particles and subsequent diffusion during the particle-dissolution process 5) .…”

Section: Heat Treatmentmentioning

confidence: 99%

Effect of Rolling and Alloying Elements on the Impact Properties of Hypereutectoid Steels

Tokunaga,

Minamino,

Yamamoto

et al. 2024

ISIJ Int.

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In this study, to develop steel with high strength and ductility, steels are designed based on JIS-SUJ2 hypereutectoid steel by controlling the contents of the alloying elements Cr and Mn. The steels are subjected to two types of specially designed heat treatment, i.e., "grain boundary amelioration (GBA)" treatment, with and without rolling. The effects of the alloy type and rolling on the microstructure and impact properties are investigated. High impact values over 50 J/cm 2 were achieved compared to those of conventional steels by the significant refinement of γ grains with GBA treatment. All the steels exhibit transgranular fracture, and no intergranular fracture was observed. This indicates that the proposed heat treatment achieved the suppression of intergranular fracture by inhibiting the formation of θ particles on the grain boundaries and by refining the prior γ grains. Moreover, it has been suggested that the impact values were strongly affected by the C content in the matrix which is controlled by the alloying element and by the heat treatment. As the C content increases, hardness and fraction of the retained γ phase increase, which leads to the decrease in impact value. In samples where prior γ grains were extremely fine and θ particles were fine, area fraction and circularity of the θ particles did not have a significant effect on the impact values.

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Section: Heat Treatmentmentioning

confidence: 99%

Effect of Rolling and Alloying Elements on the Impact Properties of Hypereutectoid Steels

Tokunaga,

Minamino,

Yamamoto

et al. 2024

ISIJ Int.

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Production of AA 2014 Matrix Wollostanite/Wood Ash Solid Waste Particle Reinforced Hybrid Composite with Powder Metallurgy and Investigation of Its Structural Properties

Gökmeşe,

Bülbül

2024

JOM

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In this study, using AA 2014 aluminum alloy, AA2014/wollastanite, AA2014/wood ash, and AA2014/wollastanite/wood ash composite hybrid materials were produced by powder metallurgy method. The powders, whose mixing ratios were determined by weight, were mixed in a 3-dimensional mixer for 30 min. The prepared mixture powders were pressed uniformly under a pressure of 700 MPa, and cylindrical materials with a diameter of 10 mm were obtained. Then, the materials were sintered for 1 h under argon gas flow at a temperature of 600°C. The density, microstructure, hardness, and wear behavior of the materials were examined. It was observed that the density of the composite materials increased relatively compared to AA 2014 alloy. As the particle reinforcement ratios increased, porosity amounts also increased in the composite and especially in the hybrid materials. In the wood ash-reinforced composite materials, the particles were distributed more homogeneously in the microstructure. The highest hardness value obtained was 70.65 HV in AA2014/15% wollastanite composite material. The weight loss increased in the materials created by particle reinforcement, and the lowest weight loss (170 mg) was determined in this material.

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Effect of Various Spheroidizing Methods on Microstructure–Mechanical Properties and Wear Performance of PM High-Carbon Steel

Cited by 2 publications

References 27 publications

Effect of Rolling and Alloying Elements on the Impact Properties of Hypereutectoid Steels

Effect of Rolling and Alloying Elements on the Impact Properties of Hypereutectoid Steels

Production of AA 2014 Matrix Wollostanite/Wood Ash Solid Waste Particle Reinforced Hybrid Composite with Powder Metallurgy and Investigation of Its Structural Properties

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