Technology of Plasticity. Three-Dimensional FEM Analysis of Helical Gear Subjected to the Carburized Quenching Process.

Fukumoto, Manabu; Yoshizaki, Masatoshi; Imataka, Hideki; Okamura, Kazuo; Yamamoto, Kenji

doi:10.2472/jsms.50.598

Cited by 15 publications

(7 citation statements)

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“…The major impact of transformation plasticity upon residual stresses and distortions resulting from such treatments has been underlined by various authors, see e.g. Miyao et al (1986); Fukumoto et al (2001); Taleb et al (2004), among many others. This impact constitutes the major motivation for developing good models of transformation plasticity, to be implemented in finite element programmes and used for accurate predictions of residual stresses and distortions produced by thermomechanical treatments.…”

Section: Introductionmentioning

confidence: 95%

A novel treatment of Greenwood–Johnson’s mechanism of transformation plasticity - Case of spherical growth of nuclei of daughter-phase

Majaty

Leblond

Kondo

2018

Journal of the Mechanics and Physics of Solids

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This paper proposes an innovative treatment of Greenwood and Johnson (1965)'s mechanism of transformation plasticity of metals and alloys, based on the disregard of elasticity and the powerful kinematic method of limit-analysis. In the new approach the spherical representative unit cell considered in the homogenization process includes only the mother-phase surrounding a growing nucleus of daughter-phase, but the external loading arising from the macroscopic stress applied is supplemented with an internal one arising from the volumetric transformation strain of the enclosed nucleus. The treatment brings considerable improvement to the classical one of Leblond et al. (1989), not only by eliminating the need for ad hoc hypotheses of limited validity, but more importantly by extending its results to more general situations involving large external stresses, comparable in magnitude to the yield stress of the weaker, motherphase. The theoretical results are compared to other theories, experiments, and finite element micromechanical simulations considering a representative volume of shape identical to that in the theory. In addition, the methodology presented paves the way to incorporation, in a future work, of the effect of anisotropies of morphologic type (tied for instance to growth of nuclei of daughter-phase elongated in a certain privileged direction) upon transformation plasticity; this will be done through consideration of representative unit cells of more complex shape.

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Section: Introductionmentioning

confidence: 95%

A novel treatment of Greenwood–Johnson’s mechanism of transformation plasticity - Case of spherical growth of nuclei of daughter-phase

Majaty

Leblond

Kondo

2018

Journal of the Mechanics and Physics of Solids

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“…Transformation plasticity occurs during thermomechanical treatments of steels and metallic alloys, such as welding or quenching processes. This phenomenon induces residual stresses and distortions inside the materials, which modify their macroscopic mechanical behaviour; see, among others (Miyao et al, 1986;Fukumuto et al, 2001;Taleb et al, 2004). It is commonly accepted that transformation plasticity is due to two main mechanisms, a diffusive one (Greenwood and Johnson, 1965) and a displacive one (Magee and Paxton, 1966).…”

Section: Introductionmentioning

confidence: 99%

FFT-based micromechanical simulations of transformation plasticity. Comparison with a limit-analysis-based theory

Majaty¹,

Brenner²,

Leblond³

2021

European Journal of Mechanics - A/Solids

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This work addresses the numerical simulation of transformation plasticity by using a numerical scheme based on the fast Fourier transform (FFT). A two-phase material with isotropic thermoelastoplastic phases is considered. Together with prescribed transformation kinetics, this permits to describe the plasticity induced by the accommodation of the volume change accompanying the phase transformation (Greenwood-Johnson mechanism). We consider random distributions of -phase nuclei within a homogeneous -phase matrix, with an isotropic growth law of the nuclei. The numerical results are compared to a recently proposed limit-analysis-based theory (El Majaty et al., 2018), which permits in particular to account for a nonlinear dependence of the "transformation plastic strain" with the stress applied. A very good agreement between the FFT simulations and the theory is obtained, for uniaxial and multiaxial loadings, over a wide range of stresses applied.

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“…Many works on the field of carburizingquenching of a steel gear were done for that reason. Most research activities that were carried out previously had focused on the effect of carbon content (Ju et al, 2003;Mukai and Ju, 2004), carburizing and diffusion time (Takasaki et al, 2000), different base material (Fukumoto et al, 2002), headup and head-down method of immersing gear (Sugimoto and Watanabe, 2004), tooth width and case depth (Shichino et al, 2001), and transformation plasticity (Sugianto et al, 2007) on overall gear quality by experiment and simulation. To our knowledge, however, only a few experiments have focused on different types of HTCs being employed on the gear model.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental verification of carburizing-quenching process of SCr420H steel helical gear

Sugianto

Narazaki

Kogawara

et al. 2009

Journal of Materials Processing Technology

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Technology of Plasticity. Three-Dimensional FEM Analysis of Helical Gear Subjected to the Carburized Quenching Process.

Cited by 15 publications

References 0 publications

A novel treatment of Greenwood–Johnson’s mechanism of transformation plasticity - Case of spherical growth of nuclei of daughter-phase

A novel treatment of Greenwood–Johnson’s mechanism of transformation plasticity - Case of spherical growth of nuclei of daughter-phase

FFT-based micromechanical simulations of transformation plasticity. Comparison with a limit-analysis-based theory

Numerical simulation and experimental verification of carburizing-quenching process of SCr420H steel helical gear

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