Fine grains with high-density annealing twins and precipitates inducing favorable strength and excellent plasticity in laser powder bed fusion-fabricated Inconel 718 via deep cryogenic and heat treatments

Liu, Bo; Xu, Jiayu; Gao, Yubi; Hu, Yong; Yang, Xiaokang; Ding, Yutian; Zhang, Dong; Lu, Sujun

doi:10.1016/j.jmst.2023.11.030

Cited by 11 publications

(2 citation statements)

References 88 publications

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“…Similarly, the A356 alloy achieved superior mechanical properties through a multistep heat treatment sequence incorporating solid-solution, DC, and aging processes [26]. For AM metallic alloys, it also has been reported that Inconel 718 achieves remarkable tensile strength and ductility through a strategic combination of DC processing, annealing, and aging treatments [24].…”

Section: Introductionmentioning

confidence: 97%

“…Given the capacity of DC treatment to intensify the driving force for atomic precipitation in SSS or to introduce high-density defects [18,24], the combination of DC with other thermal treatments, such as aging, presents a promising avenue for exploration. For example, the EN AW 6026 alloy demonstrated enhanced strength and hardness following a combined DC and aging treatment, attributed to the elevated density of peak aging strengthening precipitates [25].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Tang,

Yan,

et al. 2024

Metals

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Deep cryogenic aging (DCA) is a newly developed heat treatment technique for additive-manufactured metallic materials to reduce residual stress and improve their mechanical properties. In this study, AlSi10Mg alloy samples fabricated by selective laser melting were deep-cryogenic-treated at −160 °C and subsequently aged at 160 °C. Phase and microstructural analyses were conducted using X-ray diffraction, optical microscopy, scanning electron microscopy, and transmission electron microscopy, while the mechanical properties were evaluated through microhardness and tensile testing at room temperature. The results indicated that the DCA treatment did not have an effect on the morphology of the melt pools. However, it facilitated the formation of atomic clusters and nanoscale Si and β′ phases, as well as accelerating the coarsening of grains and the ripening of the eutectic Si phase. After DCA treatment, the mass fraction of the Si phase experienced an increase from 4.4% to 7.2%. Concurrently, the volume fraction of the precipitated secondary phases elevated to 5.1%. The microhardness was enhanced to 147 HV, and the ultimate tensile strength and yield strength achieved 495 MPa and 345 MPa, respectively, with an elongation of 7.5%. In comparison to the as-built specimen, the microhardness, ultimate tensile strength, and yield strength increased by 11.4%, 3.1%, and 19.0%, respectively. The improvement in mechanical properties is primarily attributed to the Orowan strengthening mechanism induced by the secondary phases.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Tang,

Yan,

et al. 2024

Metals

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Deep Cryogenic and Thermal Aging Treatments of Ti–5Al–5Mo–5V–3Cr Alloy Additively Manufactured by Powder Bed Fusion–Laser Beam

Zhang,

Chen,

Liu

et al. 2024

Adv Eng Mater

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The properties of 3D‐printed components via Powder Bed Fusion – Laser Beam (PBF‐LB) depend strongly on the processing parameters, particularly due to the rapid solidification conditions involved. This study introduces an innovative post‐treatment strategy combining deep cryogenic and thermal aging treatments to enhance the properties of Ti‐5Al‐5V‐5Mo‐3Cr alloy (Ti‐5553) alloy fabricated by Powder Bed Fusion – Laser Beam. The results reveal that deep cryogenic treatment of as‐built material can refine the grain size and introduce defects and sub‐grain boundaries, thereby improving strength and ductility without significantly altering the microstructure or phase composition. However, applying deep cryogenic treatment after aging can significantly improve ductility and maintain strength, primarily by refining β phase grains. Conversely, thermal aging followed by deep cryogenic treatment of as‐built materials tends to increase strength at the expense of ductility, due to the formation of the ω phase and defects induced by the cryogenic treatment that in turn promote the development of more abundant and finer α phase within grains during aging. The findings of this research offer significant insights and valuable methodologies for optimizing the mechanical properties of Ti‐5553 alloy manufactured by Powder Bed Fusion – Laser Beam via an extra deep cryogenic treatment following thermal aging.This article is protected by copyright. All rights reserved.

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Characterization and degradation of β-Sn particles in thermal aged Pb-rich solder joint for low-temperature co-fired ceramic (LTCC) applications

Liu,

Zhu,

Nie

et al. 2024

Rare Met.

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Fine grains with high-density annealing twins and precipitates inducing favorable strength and excellent plasticity in laser powder bed fusion-fabricated Inconel 718 via deep cryogenic and heat treatments

Cited by 11 publications

References 88 publications

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Deep Cryogenic and Thermal Aging Treatments of Ti–5Al–5Mo–5V–3Cr Alloy Additively Manufactured by Powder Bed Fusion–Laser Beam

Characterization and degradation of β-Sn particles in thermal aged Pb-rich solder joint for low-temperature co-fired ceramic (LTCC) applications

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