Mechanical performance and deformation mechanisms at cryogenic temperatures of 316L stainless steel processed by laser powder bed fusion: In situ neutron diffraction

Lei Tang; Oxana V. Magdysyuk; Fuqing Jiang; Yiqiang Wang; Alexander Evans; Saurabh Kabra; Biao Cai

doi:10.1016/j.scriptamat.2022.114806

Mechanical performance and deformation mechanisms at cryogenic temperatures of 316L stainless steel processed by laser powder bed fusion: In situ neutron diffraction

Lei Tang
, Oxana V. Magdysyuk
, Fuqing Jiang
, Yiqiang Wang
, Alexander Evans
, Saurabh Kabra
, Biao Cai

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

28 Scopus citations

Abstract

Manufacturing austenitic stainless steels (ASSs) using additive manufacturing is of great interest for cryogenic applications. Here, the mechanical and microstructural responses of a 316L ASS built by laser powder bed fusion were revealed by performing in situ neutron diffraction tensile tests at the low-temperature range (from 373 to 10 K). The stacking fault energy almost linearly decreased from 29.2 ± 3.1 mJm⁻² at 373 K to 7.5 ± 1.7 mJm⁻² at 10 K, with a slope of 0.06 mJm⁻²K⁻¹, leading to the transition of the dominant deformation mechanism from strain-induced twinning to martensite formation. As a result, excellent combinations of strength and ductility were achieved at the low-temperature range.

Original language	English
Article number	114806
Journal	Scripta Materialia
Volume	218
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114806
State	Published - Sep 2022
Externally published	Yes

Funding

The authors thank ISIS neutron and muon source (the Rutherford Appleton Laboratory , UK) for providing the beamtime ( RB1810732 , RB1920111 , and RB2010324 ) and staff at ENGIN-X beamline for support. BC appreciates the support from the Royal Society International Exchange Grant (IECNSFC91319) and Research Grant (RGSR2122). YW would like to acknowledge the EPSRC (EP/T012250/1) for time. The authors thank ISIS neutron and muon source (the Rutherford Appleton Laboratory, UK) for providing the beamtime (RB1810732, RB1920111, and RB2010324) and staff at ENGIN-X beamline for support. BC appreciates the support from the Royal Society International Exchange Grant (IECNSFC91319) and Research Grant (RGSR2122). YW would like to acknowledge the EPSRC (EP/T012250/1) for time.

Keywords

Additive manufacturing
Austenitic stainless steel
Cryogenic deformation
Neutron diffraction

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10.1016/j.scriptamat.2022.114806

Cite this

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title = "Mechanical performance and deformation mechanisms at cryogenic temperatures of 316L stainless steel processed by laser powder bed fusion: In situ neutron diffraction",

abstract = "Manufacturing austenitic stainless steels (ASSs) using additive manufacturing is of great interest for cryogenic applications. Here, the mechanical and microstructural responses of a 316L ASS built by laser powder bed fusion were revealed by performing in situ neutron diffraction tensile tests at the low-temperature range (from 373 to 10 K). The stacking fault energy almost linearly decreased from 29.2 ± 3.1 mJm−2 at 373 K to 7.5 ± 1.7 mJm−2 at 10 K, with a slope of 0.06 mJm−2K−1, leading to the transition of the dominant deformation mechanism from strain-induced twinning to martensite formation. As a result, excellent combinations of strength and ductility were achieved at the low-temperature range.",

keywords = "Additive manufacturing, Austenitic stainless steel, Cryogenic deformation, Neutron diffraction",

author = "Lei Tang and Magdysyuk, \{Oxana V.\} and Fuqing Jiang and Yiqiang Wang and Alexander Evans and Saurabh Kabra and Biao Cai",

note = "Publisher Copyright: {\textcopyright} 2022 Acta Materialia Inc.",

year = "2022",

month = sep,

doi = "10.1016/j.scriptamat.2022.114806",

language = "English",

volume = "218",

journal = "Scripta Materialia",

issn = "1359-6462",

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TY - JOUR

T1 - Mechanical performance and deformation mechanisms at cryogenic temperatures of 316L stainless steel processed by laser powder bed fusion

T2 - In situ neutron diffraction

AU - Tang, Lei

AU - Magdysyuk, Oxana V.

AU - Jiang, Fuqing

AU - Wang, Yiqiang

AU - Evans, Alexander

AU - Kabra, Saurabh

AU - Cai, Biao

PY - 2022/9

Y1 - 2022/9

N2 - Manufacturing austenitic stainless steels (ASSs) using additive manufacturing is of great interest for cryogenic applications. Here, the mechanical and microstructural responses of a 316L ASS built by laser powder bed fusion were revealed by performing in situ neutron diffraction tensile tests at the low-temperature range (from 373 to 10 K). The stacking fault energy almost linearly decreased from 29.2 ± 3.1 mJm−2 at 373 K to 7.5 ± 1.7 mJm−2 at 10 K, with a slope of 0.06 mJm−2K−1, leading to the transition of the dominant deformation mechanism from strain-induced twinning to martensite formation. As a result, excellent combinations of strength and ductility were achieved at the low-temperature range.

AB - Manufacturing austenitic stainless steels (ASSs) using additive manufacturing is of great interest for cryogenic applications. Here, the mechanical and microstructural responses of a 316L ASS built by laser powder bed fusion were revealed by performing in situ neutron diffraction tensile tests at the low-temperature range (from 373 to 10 K). The stacking fault energy almost linearly decreased from 29.2 ± 3.1 mJm−2 at 373 K to 7.5 ± 1.7 mJm−2 at 10 K, with a slope of 0.06 mJm−2K−1, leading to the transition of the dominant deformation mechanism from strain-induced twinning to martensite formation. As a result, excellent combinations of strength and ductility were achieved at the low-temperature range.

KW - Additive manufacturing

KW - Austenitic stainless steel

KW - Cryogenic deformation

KW - Neutron diffraction

UR - https://www.scopus.com/pages/publications/85130367406

U2 - 10.1016/j.scriptamat.2022.114806

DO - 10.1016/j.scriptamat.2022.114806

M3 - Article

AN - SCOPUS:85130367406

SN - 1359-6462

VL - 218

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114806

ER -

Mechanical performance and deformation mechanisms at cryogenic temperatures of 316L stainless steel processed by laser powder bed fusion: In situ neutron diffraction

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Keywords

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