Deformation twinning-induced dynamic recrystallization during laser powder bed fusion

Hossein Eskandari Sabzi; Xiao Hui Li; Chi Zhang; Hanwei Fu; David San-Martín; Pedro E.J. Rivera-Díaz-del-Castillo

doi:10.1016/j.scriptamat.2021.114307

Deformation twinning-induced dynamic recrystallization during laser powder bed fusion

Hossein Eskandari Sabzi
, Xiao Hui Li
, Chi Zhang
, Hanwei Fu^*
, David San-Martín
, Pedro E.J. Rivera-Díaz-del-Castillo

^*Corresponding author for this work

School of Materials Science and Engineering

Lancaster University
Beihang University
Key Laboratory of Precision Opto-Mechatronics Technology (Ministry of Education)
CSIC

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.

Original language	English
Article number	114307
Journal	Scripta Materialia
Volume	207
DOIs	https://doi.org/10.1016/j.scriptamat.2021.114307
State	Published - 15 Jan 2022

Keywords

Austenitic stainless steel
Dynamic recrystallization
Laser powder bed fusion
Transmission electron microscopy
Twinning

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10.1016/j.scriptamat.2021.114307

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title = "Deformation twinning-induced dynamic recrystallization during laser powder bed fusion",

abstract = "Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.",

keywords = "Austenitic stainless steel, Dynamic recrystallization, Laser powder bed fusion, Transmission electron microscopy, Twinning",

author = "Sabzi, \{Hossein Eskandari\} and Li, \{Xiao Hui\} and Chi Zhang and Hanwei Fu and David San-Mart{\'i}n and Rivera-D{\'i}az-del-Castillo, \{Pedro E.J.\}",

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year = "2022",

month = jan,

day = "15",

doi = "10.1016/j.scriptamat.2021.114307",

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journal = "Scripta Materialia",

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TY - JOUR

T1 - Deformation twinning-induced dynamic recrystallization during laser powder bed fusion

AU - Sabzi, Hossein Eskandari

AU - Li, Xiao Hui

AU - Zhang, Chi

AU - Fu, Hanwei

AU - San-Martín, David

AU - Rivera-Díaz-del-Castillo, Pedro E.J.

PY - 2022/1/15

Y1 - 2022/1/15

N2 - Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.

AB - Nanotwin formation is observed during laser powder bed fusion (LPBF) of austenitic stainless steels fabricated with various process parameters. Transmission electron microscopy was employed to reveal the nature of such twins, which are formed due to the high strain rapid solidification inherent to LPBF. Dynamic recrystallization (DRX) was also activated during LPBF, and induced by the deformation nanotwins. A thermostatistical model is proposed to determine the critical conditions for twinning-induced DRX; the model is validated with the reported experimental results. This modelling approach offers a method to microstructurally engineer austenitic stainless steels for potential applications needing high strength and ductility.

KW - Austenitic stainless steel

KW - Dynamic recrystallization

KW - Laser powder bed fusion

KW - Transmission electron microscopy

KW - Twinning

UR - https://www.scopus.com/pages/publications/85116002366

U2 - 10.1016/j.scriptamat.2021.114307

DO - 10.1016/j.scriptamat.2021.114307

M3 - 文章

AN - SCOPUS:85116002366

SN - 1359-6462

VL - 207

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114307

ER -

Deformation twinning-induced dynamic recrystallization during laser powder bed fusion

Abstract

Keywords

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