Microstructure control of pure iron by utilizing metal cutting method

Nagashima, Fumihisa; Yoshino, Masahiko; Terano, Minoru

doi:10.1016/j.promfg.2018.07.323

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…The chips are continuous and strong, and the tool is worn rapidly, which makes it difficult to guarantee the surface quality and dimensional accuracy of the workpiece. Therefore, pure iron is a typical material that is difficult to process [4][5][6]. To resolve these problems, during the cutting of pure iron, predominant technical methods were investigated, including dry-ice technology, minimum-quantity-lubrication (MQL) technology, and water-jet technology.…”

Section: Introductionmentioning

confidence: 99%

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

Kong

Song

et al. 2020

Materials

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To investigate the mechanism of surface modification of pure iron by atmospheric pressure plasma treatment (APPT), the surface wettability of pure iron was characterized by using a contact-angle measuring instrument, and the mechanical properties of pure iron were measured by a tensile testing machine and nanoindentation instrument. Molecular dynamics simulations were used to explain the modification mechanism of the surface wettability and the mechanical behavior of pure iron by APPT. The experimental results show that pure iron treated by APPT is superhydrophilic, with reduced tensile strength and surface hardness. This result agrees with the molecular dynamics simulation, which shows that the pure iron material hydrophilicity improved after APPT. The behavior was attributed to the formation of hydrogen bonds on the surface of the pure iron after APPT. The surface binding energy of the pure iron material increased between the water molecule and the residual N atom that was induced by APPT. The N atom that was introduced by the APPT led to Fe bond fracture, and the N atom reduced the Fe bond strength, which resulted in a reduction of material yield strength and microhardness.

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Section: Introductionmentioning

confidence: 99%

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

Kong

Song

et al. 2020

Materials

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Study on effects of strong shear strain on recrystallized grain size of pure iron and microstructure control method

Nagashima

Nakagawa

Yoshino

2020

Procedia Manufacturing

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Influence of Severe Plastic Deformation on Static Recrystallization Microstructure of Pure Iron

Nagashima

Nakagawa

Yoshino

2020

Metals

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In recent years, ultrafine-grained steel has been gaining increasing attention as a high-performance material. Accordingly, it is necessary to develop an efficient production method for ultrafine-grained steel. Severe plastic deformation is a critical factor that causes grain subdivision into ultrafine grains less than 1 µm in diameter. In this study, the effects of plastic deformation on the microstructure and static recrystallization of pure iron were studied by comparing orthogonal cutting and rolling. Orthogonal cutting yielded ultrafine grains with a diameter of 0.2 µm. It was found that a high strain rate in the thin shear plane generated during the cutting process caused a uniform subdivision of grains, and this uniform plastic deformation resulted in the uniform recrystallization of grains. In addition, a theoretical model was developed, and it was revealed that the number of recrystallized grains depended on the fraction of a large-misorientation area constructed with geometrically necessary boundaries (GNBs). It was suggested that the cutting process was more advantageous than rolling in producing ultrafine recrystallized grains because cutting could apply severe plastic strain uniformly on a work material, effectively generating GNBs.

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Microstructure control of pure iron by utilizing metal cutting method

Cited by 3 publications

References 14 publications

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

Surface Physical and Chemical Modification of Pure Iron by Using Atmospheric Pressure Plasma Treatment

Study on effects of strong shear strain on recrystallized grain size of pure iron and microstructure control method

Influence of Severe Plastic Deformation on Static Recrystallization Microstructure of Pure Iron

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