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Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Radhakrishnan, Sharma, Palaniappan, Kumar, Verma, and Dahotre

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Title: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Radhakrishnan, Sharma, Palaniappan, Kumar, Verma, and Dahotre
Authors: Radhakrishnan, Madhavan1,2 (AUTHOR), Sharma, Shashank1,2,3 (AUTHOR), Palaniappan, Selvamurugan1,2 (AUTHOR), Kumar, K. N. Chaithanya1,2 (AUTHOR), Verma, Krishna Kamlesh1,2 (AUTHOR), Dahotre, Narendra B.1,2 (AUTHOR) narendra.dahotre@unt.edu
Source: JOM: The Journal of The Minerals, Metals & Materials Society (TMS). May2025, Vol. 77 Issue 5, p2888-2896. 9p.
Subjects: Ferritic steel, Electron diffraction, Microstructure, Lasers, Austenite
Abstract: This study examined the effects of laser processing conditions on the evolution of microstructure and phase fractions in HT9 ferritic/martensitic (F/M) steels fabricated using laser powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED). Electron backscattered diffraction (EBSD) micrographs of the cross-sections of the laser-processed builds showed the presence of α-ferrite, α′-martensite, and retained austenite (γ). Distinct differences were observed in the γ phase fraction between the L-PBF and L-DED microstructures. To correlate the observed phase fractions with process-induced thermokinetic effects, a multiscale multiphysics thermal model was used. The modeling results confirmed the experimental data and provided insight into the relationship between temperature changes during processing and phase evolution in HT9 steel. [ABSTRACT FROM AUTHOR]
Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Radhakrishnan, Sharma, Palaniappan, Kumar, Verma, and Dahotre
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  Data: <searchLink fieldCode="DE" term="%22Ferritic+steel%22">Ferritic steel</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+diffraction%22">Electron diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Lasers%22">Lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Austenite%22">Austenite</searchLink>
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  Data: This study examined the effects of laser processing conditions on the evolution of microstructure and phase fractions in HT9 ferritic/martensitic (F/M) steels fabricated using laser powder bed fusion (L-PBF) and laser-directed energy deposition (L-DED). Electron backscattered diffraction (EBSD) micrographs of the cross-sections of the laser-processed builds showed the presence of α-ferrite, α′-martensite, and retained austenite (γ). Distinct differences were observed in the γ phase fraction between the L-PBF and L-DED microstructures. To correlate the observed phase fractions with process-induced thermokinetic effects, a multiscale multiphysics thermal model was used. The modeling results confirmed the experimental data and provided insight into the relationship between temperature changes during processing and phase evolution in HT9 steel. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of JOM: The Journal of The Minerals, Metals & Materials Society (TMS) is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11837-025-07304-3
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        Text: English
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      – SubjectFull: Ferritic steel
        Type: general
      – SubjectFull: Electron diffraction
        Type: general
      – SubjectFull: Microstructure
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      – SubjectFull: Lasers
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      – SubjectFull: Austenite
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      – TitleFull: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Processing Conditions Dependent Evolution of Microstructure in Laser Additive Manufactured HT-9 Ferritic Martensitic Steel: Radhakrishnan, Sharma, Palaniappan, Kumar, Verma, and Dahotre
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              Text: May2025
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