Influence of Cyclic Heat Treatment Temperature on Microstructure and Mechanical Properties of 18Ni(C250) Maraging Steel

Materials, Год журнала: 2024, Номер 17(12), С. 2796 - 2796

Опубликована: Июнь 7, 2024

Cyclic heat treatment is an effective approach for enhancing the mechanical properties of 18Ni(C250) maraging steel, and selection cyclic temperature a key factor. In this study, process with two-step solution employed to investigate influence temperature, specifically first (920 °C, 950 980 °C), on microstructure steel. The results indicate that increase in average grain size steel decreases initially then increases. When reaches at its minimum, exhibiting optimal uniformity. Additionally, reduction martensitic lath same orientation inside grains, along relative quantity low-angle boundaries. Furthermore, volume fraction retained austenite show monotonous rise treatment, rate becomes notably larger when raised from °C °C. Based observed microstructural changes, variation was analyzed. Specifically, as increases, tensile strength increases stabilizes, while elongation fracture toughness exhibit monotonic increase.

Язык: Английский

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Long-Term Aging at 475°C: Effects on the Microstructure and Properties of CUSTOM 465® Alloy

Results in Engineering, Год журнала: 2025, Номер unknown, С. 104704 - 104704

Опубликована: Март 1, 2025

Язык: Английский

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Fundamental role of vertical building sequence and its thermodynamic mechanisms during multi-material additive manufacturing of 18Ni300-CuSn10 structures with IN718 interlayer

Journal of Manufacturing Processes, Год журнала: 2025, Номер 144, С. 243 - 260

Опубликована: Апрель 17, 2025

Язык: Английский

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Unveiling The Impact of Nitriding and PVD Coating on The Fatigue Properties of L-PBF Maraging Steel

Materials Science and Engineering A, Год журнала: 2025, Номер unknown, С. 148365 - 148365

Опубликована: Апрель 1, 2025

Язык: Английский

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Microstructures and cracking behaviors of AlCoCrFeNiTi0.2 high-entropy alloy fabricated by laser powder bed fusion

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180999 - 180999

Опубликована: Май 1, 2025

Язык: Английский

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Simultaneously Reducing Porosity and Strengthening the Additively Manufactured 18Ni300 Steel Through Cyclic Electropulsing Treatment

Metals and Materials International, Год журнала: 2025, Номер unknown

Опубликована: Май 16, 2025

Язык: Английский

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Effect of Heat Treatment on Microstructure and Mechanical Properties of Low-Cost High Strength Steel by Plasma Arc-Based Directed Energy Deposition

Опубликована: Янв. 1, 2025

Язык: Английский

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Microstructures and Precipitation Behaviors of a Hypoeutectic High-Entropy Alloy Prepared by Laser Powder Bed Fusion

Опубликована: Янв. 1, 2023

The trade-off between strength and ductility remains a significant challenge for high-entropy alloys (HEAs). layer-by-layer printing manner inherent in the laser powder bed fusion (L-PBF) results unique microstructures alloys, yielding unexpected performances that are promising resolving this contradiction. At present, influence of L-PBF technology on mechanical properties near-eutectic HEAs has not been explored. In work, metastable AlCo0.4CrFeNi2.7 hypoeutectic HEA with an extraordinary strength-ductility combination was successfully fabricated using L-PBF. precipitation behaviors alloy were further modulated through annealing. reveal high cooling rates promote formation “pseudoeutectic” structure featuring face-centered-cubic (FCC) + body-centered-cubic (BCC) dual-phase nanolamellae. Furthermore, after annealing at 600-750 °C, L12 B2 precipitates generated FCC lamellae, accompanied by coarsening original Cr-rich BCC lamellae. as-printed sample exhibits remarkable properties, posing yield 1007 MPa, ultimate 1249 total elongation ∼25.1%. After 750 tensile increased to 1201 MPa 1512 respectively, while is maintained ~15.1%. analyses demonstrate originates from hard lamellae nanolamellar interfaces, good stems soft coordinated deformation increase substantiated introduction annealing-induced nanoprecipitates, contributing additional strengthening.

Язык: Английский

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Benchmarking L-PBF Systems for Die Production: Powder, Dimensional, Surface, Microstructural and Mechanical Characterisation

Metals, Год журнала: 2024, Номер 14(5), С. 520 - 520

Опубликована: Апрель 29, 2024

While conventional die manufacturing techniques often lead to limitations in production speed and design intricacy due labour-intensive procedures like machining casting, Additive Manufacturing (AM) emerges as a key player offering substantial potential for cost reduction process improvement mass production. This study benchmarks four leading Laser Powder Bed Fusion (L-PBF) systems producing maraging steel (EN 1.2709) dies. Despite the shared material technology, variations dimensional accuracy, surface finish, microstructure were observed among parts. SEM/EDS, EBSD, hardness testing, analysis revealed system-specific performance differences. Additionally, select parts underwent heat treatment tensile demonstrating impact of post-processing on mechanical properties. These results offer valuable guidance industrial stakeholders considering AM, highlighting importance supplier selection optimisation achieving consistent part quality unlocking full AM technologies.

Язык: Английский

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Effect of duplex surface treatment on the impact properties of maraging steel produced by laser powder bed fusion

Powder Metallurgy, Год журнала: 2024, Номер 67(4-5), С. 219 - 227

Опубликована: Май 9, 2024

The impact properties of an L-PBF 18Ni-300 maraging steel were investigated after different heat and duplex (nitriding PVD coating) surface treatments. Impact energy is almost isotropic. Contrary to expectations, not decreased by treatments, since the effect embrittlement nitriding compensated increase in austenite content. An important role played geometry notch where hardening lower than flat Charpy specimens.

Язык: Английский

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