Influence of last stage heat treatment on microstructure and mechanical properties of laser additive manufactured AF1410 steel

Li, Yifan; Cheng, Xu; Liu, Dong; Wang, Huaming

doi:10.1016/j.msea.2017.12.029

Cited by 17 publications

(2 citation statements)

References 30 publications

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“…To date, researchers pay more attention to improving the properties of high Co-Ni UHSS, including strength, fracture toughness, and corrosion resistance. Li et al [22] optimized the comprehensive mechanical properties of laser additive manufactured AF1410 steel by heat treatment method. However, few studies on the residual stress and distortion in multi-pass welding for high Co-Ni UHSS restrict the further application of UHSS in practice.…”

Section: Introductionmentioning

confidence: 99%

Residual stress and distortion in thick-plate weld joint of AF1410 steel: finite element simulations and experimental studies

Zhang¹,

Dong²,

Lu³

2022

Mater. Res. Express

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The quantification of the residual stress and distortion in the thick-plate weld joint of AF1410 steel has great significance, which is the basis for the safety and process design of the component. Therefore, this paper systematically investigated the welding residual stress and distortion distribution in the 10 mm thick welded plate for AF1410 steel by tungsten inert gas welding. The residual stress measurements were carried out by the X-ray diffraction method and advanced contour method, and the distortion was determined by coordinate measuring machine. The developed thermo-metallurgical-mechanical finite element model was applied to predict the residual stress and distortion in multi-pass welding considering solid-state phase transformation (SSPT) and transformation plasticity. The measured residual stress and distortion distribution were in good agreement with the finite element simulation results. The comparison results revealed that the residual stresses in the upper and lower parts of the welding plate were small, and there was apparent stress concentration in the center of the welding joint. SSPT and the subsequent thermal cycle had a significant influence on the magnitude of final residual stress. The accurate finite element model and the understanding of stress formation mechanism are helpful to control the residual stress and distortion distribution of aviation parts reasonably.

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Section: Introductionmentioning

confidence: 99%

Residual stress and distortion in thick-plate weld joint of AF1410 steel: finite element simulations and experimental studies

Zhang¹,

Dong²,

Lu³

2022

Mater. Res. Express

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“…Laser metal deposition (LMD) is an advanced additive manufacturing technology that uses a high energy density laser as a heat source to melt the powdered materials and produces dense metal parts in near-net shapes according to a predetermined trajectory [10,11]. It has many attractive advantages over conventional manufacturing processes for producing difficult-to-process high-performance large and critical metallic components (UHSS), e.g., no mold required, little waste and post-deposition machining, high material buy-tofly ratio, short production cycle, low production costs, few limitations of the component geometry, excellent design flexibility [12][13][14][15][16][17], high material utilization, high-efficiency, and one-shot shaping [18,19].…”

Section: Introductionmentioning

confidence: 99%

Microstructure characterization and mechanical behaviour of laser additive manufactured ultrahigh-strength M54 steel

Zhao

Ning

et al. 2022

Mater. Res. Express

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Ultra high-strength M54 steel blocks were fabricated by laser metal deposition. The microstructure and mechanical behavior of the material were investigated systematically. The microstructure of the as-deposited M54 steel is anisotropic; the cross-section (XOY plane) has a cellular structure, whereas the longitudinal section (XOZ and YOZ planes) shows a mixture of alternating cellular and columnar forms. Compositional segregation is present at the cell walls (interdendritic regions) in the as-deposited state, resulting in retained austenite at the cell walls. The cross-sectional XOY plane contains 10.08% austenite, whereas the XOZ and YOZ planes contain 24.59% and 22.4% austenite, respectively. The retained austenite at the cell wall (interdendritic region) has low thermal and mechanical stability and disappears after the cryogenic treatment or is transformed into martensite during a tensile test. The as-deposited samples show anisotropic mechanical properties. The transverse samples exhibit stronger transformation-induced plasticity (TRIP) and work hardenability with a lower yield strength of 662 MPa and higher ultimate strength of 1982 MPa, corresponding to a higher amount of retained austenite in this direction. The longitudinal ultimate strength and yield strength are 1832 MPa and 997 MPa, respectively. The ductility and toughness are also largely anisotropic, and their reduction in the transverse direction is only 1/3 of that in the longitudinal direction. The Vickers hardness of the microstructure increases slightly from the bottom to the middle and upper part of the sample due to less thermal cycling in the upper part.

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Research and prospect on microstructure and properties of laser additive manufactured parts

Li,

Liu,

Liu

et al. 2023

Int J Adv Manuf Technol

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Influence of last stage heat treatment on microstructure and mechanical properties of laser additive manufactured AF1410 steel

Cited by 17 publications

References 30 publications

Residual stress and distortion in thick-plate weld joint of AF1410 steel: finite element simulations and experimental studies

Residual stress and distortion in thick-plate weld joint of AF1410 steel: finite element simulations and experimental studies

Microstructure characterization and mechanical behaviour of laser additive manufactured ultrahigh-strength M54 steel

Research and prospect on microstructure and properties of laser additive manufactured parts

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