Studies on distortions in nitrided steel cylinders using computer simulation

Arimoto, Kyozo; Ikuta, Fumiaki; Yamanaka, Shigeru

doi:10.1504/ijmmp.2012.048525

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Arimoto et al [27] applied the simulation to the nitriding experiment of cylindrical specimens by Mailänder. Simulated length and diameter changes in specimens due to nitriding are shown in Fig.…”

Section: Figure 11: Shape and Dimension Of Tanaka's Cylindrical Specimensmentioning

confidence: 99%

A Brief Review on Validation for Heat Treatment Simulation

Arimoto¹

2021

Heat Treating Conference

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Heat treatment simulation has progressed to the stage where several commercial software are available. Validations of simulation functions using experimental results contributed to this realization. Organizing information on the validations may be effective for maintaining the functions and educating users about the nature of the phenomena. For this reason, the author here briefly reviews mainly his validation cases. Since experiments using specimens having relatively simple shapes can reveal the essence of complex phenomena, the results have been used in the validations. When the basic functions such as heat transfer, phase transformation, latent heat, and hardness prediction were comprehensively validated in the early stages of software development, the author used experimental results of the inverse hardening in quenched steel cylinders. After that, his validations of the software at the stage where adding stress and strain analysis functions, used effectively measurement data of length and diameter changes, and residual stress distributions in normally quenched steel cylinders. While, it was also worth to validate curving in long specimens cooled unevenly, which included a case of specimens with a similar cross-section to the Japanese sword. In addition, the author validated distortions and residual stresses in carburized and quenched, induction hardened, and also nitrided specimens.

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Section: Figure 11: Shape and Dimension Of Tanaka's Cylindrical Specimensmentioning

confidence: 99%

A Brief Review on Validation for Heat Treatment Simulation

Arimoto¹

2021

Heat Treating Conference

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Simulated Strains-Based Approach for Explaining Distortion and Residual Stress in Quenched Pure Iron Cylinder

Arimoto¹

2022

Materials Performance and Characterization

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Distortion and residual stress in steel parts because of heat treatment affect assembled products’ performance and life. A trial-and-error method has been used traditionally to solve problems, which requires a lot of time and cost. In the 1970s, heat treatment simulation was realized based on theoretical studies for predicting temperature, volume fraction of metallic phase, stress, strains, and so on, during the processes. In the early 2000s, an approach was established to explain the origin of distortion and residual stress based on the simulated results, especially various kinds of strains, which is called the simulated strains-based approach by the author. This approach has been made possible by simulation, which has provided results such as the time history of strain distribution. The subject of the residual stress generation mechanism in a quenched pure iron cylinder is taken here to illustrate the advantages of this approach. The classic study of this problem is Rose's illustration using a conceptual diagram of the variation of temperature and stress at the surface and center of the cylinder. In connection with this diagram, thermal shrinkage and elastic deformation, and the relationship between them and stress, are qualitatively explained. However, it is difficult to understand this diagram logically because the meaning of the correction applied to the stresses after the onset of plasticity was not clearly explained. On the other hand, the simulated strains-based approach using changes in distributions of thermal, elastic, plastic, and total strains provided a clear explanation of how the final distribution of the elastic strain, which is corresponded to the residual stress, is generated. Because quenching of steel parts produces additional transformation strain and transformation plastic strain, the quenching of pure iron is an excellent introduction to the application of a simulated strains-based approach.

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熱処理シミュレーションの妥当性確認に関する小考

ARIMOTO

2023

J. Soc. Mat. Sci., Japan

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Studies on distortions in nitrided steel cylinders using computer simulation

Cited by 3 publications

References 11 publications

A Brief Review on Validation for Heat Treatment Simulation

A Brief Review on Validation for Heat Treatment Simulation

Simulated Strains-Based Approach for Explaining Distortion and Residual Stress in Quenched Pure Iron Cylinder

熱処理シミュレーションの妥当性確認に関する小考

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