Strain-Induced Martensitic Transformation Kinetic in Austempered Ductile Iron (ADI)

Li, Xiaohu; Saal, Patrick; Gan, Weimin; Hoelzel, Markus; Volk, Wolfram; Petry, W.; Hofmann, M.

doi:10.1007/s11661-017-4420-3

Cited by 15 publications

(20 citation statements)

References 40 publications

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“…Additionally, in the SADP, a typical crystallographic orientation relationship ([001]F//[011]A), labeled as Nishiyama-Wasserman (N-W)) between austenite and ferrite has been found and is depicted in Figure 2b. This also is in good agreement with recent texture measurements showing a similar orientation relationship in bulk samples [28,29].…”

Section: Ausferritic Microstructuresupporting

confidence: 93%

“…On the other hand, the ratio between carbon and iron atoms in the smaller granular parts does not coincide with any known carbide composition. For this, areas with the most likely explanation are granular retained austenite (carbon content ≤ 8 at%) and carbon clusters (Carbon content 8-15 at%) [37]. However, as stated above APT is a local probe, and therefore, the content and morphology of carbide formed cannot easily and directly be compared to the bulk averaged results from diffraction experiments.…”

Section: Elementmentioning

confidence: 97%

Section: Elementmentioning

confidence: 99%

“…This relationship indicates that the ferritic phase is supersaturated with carbon throughout Figure 5. APT maps of carbon atoms in ADI (from [37]). Red dots: carbon atom.…”

Section: Synchrotron Diffractionmentioning

confidence: 99%

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Carbon Redistribution Process in Austempered Ductile Iron (ADI) During Heat Treatment—APT and Synchrotron Diffraction Study

Wagner

Stark

et al. 2019

Metals

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In-situ synchrotron diffraction and atom probe tomography (APT) have been used to study the carbon diffusion and redistribution process in austempered ductile iron (ADI) during austempering. The process of carbon content change in bainitic ferrite during different austempering temperatures has been determined quantitatively. The transformation in ADI is controlled by decarburization of supersaturated ferrite and carbide precipitation and has been found to be divided into three stages based on a model developed for bainitic steels by Takahashi and Bhadeshia. The formation, morphology and composition of carbides and carbon clusters in ferrite after austempering have been identified unequivocally by APT. Finally, the relationships of carbon content in ferrite, carbon gap values, and austempering temperatures in the ADI alloy were expressed using empirical equations.

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Section: Ausferritic Microstructuresupporting

confidence: 93%

Section: Elementmentioning

confidence: 97%

Section: Elementmentioning

confidence: 99%

“…This relationship indicates that the ferritic phase is supersaturated with carbon throughout Figure 5. APT maps of carbon atoms in ADI (from [37]). Red dots: carbon atom.…”

Section: Synchrotron Diffractionmentioning

confidence: 99%

See 2 more Smart Citations

Carbon Redistribution Process in Austempered Ductile Iron (ADI) During Heat Treatment—APT and Synchrotron Diffraction Study

Wagner

Stark

et al. 2019

Metals

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“…In case of deformed ADI material, we have already shown that using standard Rietveld analysis considering the texture can yield phase contents with very high accuracy (error in phase volume fraction is less than 2 vol. %) [20]. However, the experimental effort and data analysis processes are quite time consuming and we therefore aim to a practical approach of this method making it more time efficient and simplifying the whole process.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale phase analyses of strain-induced martensite in austempered ductile iron (ADI) using neutron diffraction and transmission techniques

Soria

Gan

et al. 2020

J Mater Sci

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The content of strain-induced martensite in austempered ductile iron has been quantitatively determined using three different kinds of neutron methods: (1) high-resolution powder diffraction with subsequent standard Rietveld refinement, (2) phase quantification using pole figure measurements and (3) Bragg edge neutron transmission. The accuracy and scope of applications of these neutron diffraction and imaging techniques for phase quantification have been compared and discussed in detail. Combination of these methods has been confirmed as effective for dealing with problems like peak overlap in multi-phase materials and texture formation after plastic deformation. Further, the results highlight the potential of using single peak pole figure data for quantitative phase analysis with high accuracy.

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Effects of Short-Time Austenitization on Mechanical Properties and Transformation-Induced Plasticity in Alloyed Austempered Ductile Iron

et al. 2021

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Strain-Induced Martensitic Transformation Kinetic in Austempered Ductile Iron (ADI)

Cited by 15 publications

References 40 publications

Carbon Redistribution Process in Austempered Ductile Iron (ADI) During Heat Treatment—APT and Synchrotron Diffraction Study

Carbon Redistribution Process in Austempered Ductile Iron (ADI) During Heat Treatment—APT and Synchrotron Diffraction Study

Multi-scale phase analyses of strain-induced martensite in austempered ductile iron (ADI) using neutron diffraction and transmission techniques

Effects of Short-Time Austenitization on Mechanical Properties and Transformation-Induced Plasticity in Alloyed Austempered Ductile Iron

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