High-energy synchrotron x-ray study of deformation-induced martensitic transformation in a neutron-irradiated Type 316 stainless steel

Zhang, Xuan; Xu, Chi; Chen, Yiren; Chen, Wei‐Ying; Park, Jun-Sang; Kenesei, Péter; Almer, Jonathan; Burns, Jatuporn; Wu, Yaqiao; Li, Meimei

doi:10.1016/j.actamat.2020.08.057

Cited by 22 publications

(20 citation statements)

References 38 publications

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“…The microstructural information under different irradiation conditions is listed in table 2, which is adopted from a detailed examination of the microstructure of 12Cr18Ni10Ti AustSS taken out from the same reactor [55]. The experimental data of 316 stainless steel from the work of Zhang et al [9] are also analysed. The samples have an average grain size of 85 μm.…”

Section: Resultsmentioning

confidence: 99%

“…In irradiated materials, DIMT at room temperature is accelerated substantially. Irradiation hardening can contribute to DIMT [9]. Besides, the accelerated evolution of shear band fraction is a factor [9], since a higher fraction of shear bands is reported to be produced in neutron-irradiated samples compared with the unirradiated counterpart [9,30], which can lead to faster DIMT [29].…”

Section: Kinetics Model Of Martensitic Transformationmentioning

confidence: 99%

“…Irradiation hardening can contribute to DIMT [9]. Besides, the accelerated evolution of shear band fraction is a factor [9], since a higher fraction of shear bands is reported to be produced in neutron-irradiated samples compared with the unirradiated counterpart [9,30], which can lead to faster DIMT [29]. In our model, the evolution of the shear band fraction is described by equation (2.6), and the shear band evolution rate α can be raised after irradiation.…”

Section: Kinetics Model Of Martensitic Transformationmentioning

confidence: 99%

“…The propensity of DIMT is accelerated by neutron or ion irradiation, generating a much more significant volume fraction of α′-martensite (body-centred cubic structure, BCC) phase from the γ-austenite (face-centred cubic structure) matrix than their unirradiated counterpart during post-irradiation mechanical tests [9,26]. In the irradiated AustSSs with complex deformation microstructures, the dominant role of deformation-induced α′-martensite has been found with increasing irradiation dose [9,14,26,27]. Furthermore, an intensely localized martensitic transformation moving along the sample similar to a deformation band is reported repeatedly in neutron-irradiated AustSSs [9,28].…”

Section: Introductionmentioning

confidence: 99%

“…In the irradiated AustSSs with complex deformation microstructures, the dominant role of deformation-induced α′-martensite has been found with increasing irradiation dose [9,14,26,27]. Furthermore, an intensely localized martensitic transformation moving along the sample similar to a deformation band is reported repeatedly in neutron-irradiated AustSSs [9,28]. In order to understand the irradiation effect on DIMT from the microscopic perspective, it will be essential to probe into the evolution mechanism of DIMT localization and its correlation with martensitic transformation kinetics.…”

Section: Introductionmentioning

confidence: 99%

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Model for deformation-induced martensitic transformation in irradiated materials

et al. 2023

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Deformation-induced martensitic transformation (DIMT) is commonly reported to be easily activated in irradiated materials, but the existing transformation kinetics models of DIMT hardly capture the irradiation effect. In this work, we develop a transformation kinetics model considering the effect of irradiation hardening, shear band evolution and the role of irradiation-induced voids. A crystal plasticity framework incorporating the newly developed transformation kinetics model is established. We show that the framework is capable of capturing the accelerated evolution of martensite volume fraction in both cases with and without irradiation-induced voids. Moreover, the framework successfully simulates two post-irradiation phenomena observed in experiments, i.e. the localized distribution of martensite fraction and the evolution of the dominant transformation pathway. The present work is one of the first attempts at the theoretical modelling of DIMT in irradiated materials, and has the potential to benefit the application of irradiation in tailoring the martensitic transformation behaviour.

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Section: Resultsmentioning

confidence: 99%

Section: Kinetics Model Of Martensitic Transformationmentioning

confidence: 99%

Section: Kinetics Model Of Martensitic Transformationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Model for deformation-induced martensitic transformation in irradiated materials

et al. 2023

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In-Situ X-ray Diffraction Analysis of Metastable Austenite Containing Steels Under Mechanical Loading at a Wide Strain Rate Range

Isakov

Langi

Pun

et al. 2023

Metall Mater Trans A

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This paper presents and discusses the methodology and technical aspects of mechanical tests carried out at a wide strain rate range with simultaneous synchrotron X-ray diffraction measurements. The motivation for the study was to develop capabilities for in-situ characterization of the loading rate dependency of mechanically induced phase transformations in steels containing metastable austenite. The experiments were carried out at the DanMAX beamline of the MAX IV Laboratory, into which a custom-made tensile loading device was incorporated. The test setup was supplemented with in-situ optical imaging of the specimen, which allowed digital image correlation-based deformation analysis. All the measurement channels were synchronized to a common time basis with trigger signals between the devices as well as post-test fine tuning based on diffraction ring shape analysis. This facilitated precise correlation between the mechanical and diffraction data at strain rates up to 1 s−1 corresponding to test duration of less than one second. Diffraction data were collected at an acquisition rate of 250 Hz, which provided excellent temporal resolution. The feasibility of the methodology is demonstrated by providing novel data on the kinetics of the martensitic phase transformation in EN 1.4318-alloy following a rapid increase in strain rate (a so-called jump test).

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Observations of radiation-enhanced ductility in irradiated Inconel 718: Tensile properties, deformation behavior, and microstructure

et al. 2022

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High-energy synchrotron x-ray study of deformation-induced martensitic transformation in a neutron-irradiated Type 316 stainless steel

Cited by 22 publications

References 38 publications

Model for deformation-induced martensitic transformation in irradiated materials

Model for deformation-induced martensitic transformation in irradiated materials

In-Situ X-ray Diffraction Analysis of Metastable Austenite Containing Steels Under Mechanical Loading at a Wide Strain Rate Range

Observations of radiation-enhanced ductility in irradiated Inconel 718: Tensile properties, deformation behavior, and microstructure

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