Effect of aging treatment on microstructure and properties of additively manufactured maraging steel

Zhou, Fei; Wu, Riming; Xie, Wenfei; Zhang, Liang

doi:10.1080/03019233.2019.1651022

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The tensile properties of as-built maraging steels are comparable to their wrought counterparts [303,312,399]. The ultimate tensile strength of most as-built maraging steels are over 1 GPa [180,301,302,[306][307][308][309]312,313,[316][317][318]321,325,327,333,336,337,400,401].…”

Section: Maraging Steelmentioning

confidence: 97%

“…Similar to austenitic and PH stainless steels processed by LAM, cellular/dendritic structure is common in 18Ni-300 maraging steels as shown in Figure 32(a,b) [321], indicating microsegregation and high-density dislocations along the inter-cellular/dendritic area. As shown in Figure 32(e), the inter-cellular/dendritic areas are enriched with Ti, Mo, and Ni, which is related to the phase distribution in LAM processed maraging steels.…”

Section: Microstructurementioning

confidence: 99%

“…The tensile properties of as-built maraging steels are comparable to their wrought counterparts [303,312,399]. The ultimate tensile strength of most as-built maraging steels are over 1 GPa [180,301,302,306–309,312,313,316–318,321,325,327,333,336,337,400,401]. The high strength should be primarily originated from the fine martensite laths (see Figures 32 and 33).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The low volume fraction of precipitates in the as-built samples corresponded to the low strength. Thus, aging treatment is usually performed after LAM processing to further strengthen PH steels [145,273] and maraging steels [297,302,313,318,321,327]. Yadollahi et al [145] reported that the ultimate strength and fracture strain of 17-4 PH samples in the longitudinal test direction were up to ∼1400 MPa and 10% after aging treatment at 482°C for 1 h after solid solution treatment at approximately 1040°C for 30 min, which is comparable to the peak-aged wrought alloys (see Table 7).…”

Section: Processes For Enhanced Propertiesmentioning

confidence: 99%

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Laser additive manufacturing of steels

Yin

Tan

Bermingham

et al. 2021

International Materials Reviews

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Despite strong interest from many industrial sectors driving demand and advancements in laser additive manufacturing (LAM) of steels, some issues remain as barriers limiting the current industrial applications, such as defects, residual stress, scattered, inadequate or/and anisotropic properties. To overcome these problems, several effective approaches have been developed to control and/or enhance the properties of LAM produced steel components. To help researchers and engineers attain up-to-date information and knowledge in this rapidly growing area, the present work provides an overview of current research in LAM of steels, in particular austenitic steels, ferritic steels, duplex steels and martensitic steels, with a focus on understanding the interrelation between process, microstructure and mechanical properties. This review also includes substantive discussions on the effects of processing parameters, their interactions and post-LAM treatments on the metallurgy, microstructure and properties. In addition, the advances, ongoing challenges and outlooks in LAM of steels are highlighted.

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Section: Maraging Steelmentioning

confidence: 97%

Section: Microstructurementioning

confidence: 99%

“…The tensile properties of as-built maraging steels are comparable to their wrought counterparts [303,312,399]. The ultimate tensile strength of most as-built maraging steels are over 1 GPa [180,301,302,306–309,312,313,316–318,321,325,327,333,336,337,400,401]. The high strength should be primarily originated from the fine martensite laths (see Figures 32 and 33).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Processes For Enhanced Propertiesmentioning

confidence: 99%

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Laser additive manufacturing of steels

Yin

Tan

Bermingham

et al. 2021

International Materials Reviews

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Mechanical Properties and Microstructure of Laser Powder Bed Fusion‐Processed 18Ni300 Maraging Steel According to Direct Aging Treatment Conditions

No,

Jeong,

Ryu

et al. 2024

steel research int.

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The nonequilibrium microstructures produced by laser‐based additive manufacturing can enhance the mechanical properties of metallic alloys. However, the optimal post‐treatment conditions will change according to the initial microstructure induced by the manufacturing process employed. Therefore, this study investigates the optimal direct aging conditions for the post‐treatment of laser powder bed fusion‐processed 18Ni300 maraging steel by changing the aging temperature and time. The aging time required to achieve maximum tensile strength decreased as the aging temperature increased, and an increase in the aging temperature accelerated the evolution of nanoscale precipitates. The results indicate that the optimal direct aging conditions of 520 °C for 2 h achieved the largest tensile strength (≈2100 MPa) and precipitate area fraction. Notably, the reduced aging time at this temperature compared with that under conventional aging conditions (8 h at 460 °C or 490 °C) minimizes the thickening of the (Mo,Ti)‐rich segregation, which otherwise contributes to austenite reversion and strength reduction owing to overaging. Thus, the optimal direct aging conditions for additively manufactured maraging steel components are different from those for conventionally produced maraging steel components. This understanding of the microstructural changes induced by direct aging according to the initial non‐equilibrium state provides vital information for enhancing the performance of additively manufactured metallic alloys.

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