Effect of atmospheric-controlled induction-heating fine particle peening on electrochemical characteristics of austenitic stainless steel

Kikuchi, Shoichi; Iwamae, Shota; Akebono, Hiroyuki; Komotori, Jun; Kadota, Keisuke

doi:10.1016/j.surfcoat.2017.08.001

Cited by 22 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Corrosion resistance and electrochemical characteristics that were similar or superior to those of stainless steel were achieved at the treated surfaces within a few minutes. 9,10) Combustion synthesis reactions occurred when aluminum or titanium particles were used, and intermetallic compound layers with high wear resistance and high-temperature oxidation resistance were formed. 11,12) When high-speed tool steel particles with high hardness were shot to the surfaces of structural steels heated to recrystallization temperatures, surface layers containing fine grains with diameters of several micrometers were created owing to dynamic recrystallization, which improved the fatigue properties of AIH-FPP-treated steel.…”

Section: Introductionmentioning

confidence: 99%

Development of AIH-FPP Carburizing Process Using Carbon Powder

et al. 2023

Self Cite

View full text Add to dashboard Cite

In this study, the surface of industrial pure iron was treated with atmospheric-controlled induction heating fine particle peening (AIH-FPP) using mechanical coating (MC) particles of carbon/steel obtained by mixing carbon powder and fine steel particles using mechanical milling. The surface modification effect and the mechanism of its effect were examined and considered by analyzing of the treated surface. Results showed that a modified layer in which carbon elements were diffused was formed near the treated surface by the AIH-FPP treatment using MC particles. In addition, by examining the influence of the treatment conditions on the formation of the modified layer by the design of experiments, the treatment temperature showed the most significant influence among the treatment temperature, peening time, and gas flow rate. The higher the treatment temperature, the deeper the carbon diffused layer. In addition, when treated at ²1273 K, the microstructure near the surface became pearlite, and Vickers hardness increased. The time required for carbon diffusion in the AIH-FPP carburizing process using MC particles of carbon/steel was approximately the same as that of a general carburizing treatment using a reactive gas. In the AIH-FPP carburizing process, carbon is considered to be transferred from the particles to the surface, and the grain boundaries and dislocations increased by fine particle peening (FPP) are used as channels to diffuse inside the specimen. This mechanism is entirely different from the conventional carburizing methods.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of AIH-FPP Carburizing Process Using Carbon Powder

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, increasing the structural reliability of steels has become important. The microstructures and mechanical properties of stainless steels can be controlled by surface modification [2][3][4][5][6][7], the addition of different alloying elements [7,8], and grain refinement [2,5,9,10]. Grain refinement through severe plastic deformation is particularly effective in strengthening metallic materials; however, it leads to a decrease in ductility [9,11,12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fatigue Properties under Four-point Bending and Fatigue Crack Propagation in Austenitic Stainless Steel with a Bimodal Harmonic Structure

Kikuchi

Nakatsuka

Nakai

et al. 2019

Frattura Ed Integrità Strutturale

Self Cite

View full text Add to dashboard Cite

Austenitic stainless steel (JIS-SUS304L) with a bimodal harmonic structure, which is defined as a coarse-grained structure surrounded by a network of fine grains, was fabricated using powder metallurgy to improve both the strength and ductility. Four-point bending fatigue tests and Kdecreasing tests were conducted in air at room temperature under a stress ratio R of 0.1 to investigate fatigue crack propagation in SUS304L. The fatigue limit of this harmonic-structured material is higher than that of the material with a homogeneous coarse-grained structure. This is attributable to the formation of fine grains by mechanical milling and to the suppression of pore formation. In contrast, the threshold stress intensity range, Kth, for the harmonicstructured material is lower than that for the homogeneous coarse-grained material, while the crack growth rates, da/dN, are higher at comparable K. These results can be attributed to a reduction in the effective threshold stress intensity range, K eff,th , due to the presence of fine grains in the harmonic structure.

show abstract