Build Orientation Effects on Mechanical Properties of 316SS Components Produced by Directed Energy Deposition

Kersten, Samuel; Praniewicz, Maxwell; Saldaña, Christopher

doi:10.1016/j.promfg.2020.05.106

Cited by 16 publications

(7 citation statements)

References 12 publications

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“…Research on the mechanical properties of differently oriented DED-produced samples reached similar conclusions, with the yield strength and ultimate tensile strength of DED-W deposited Ti6Al4V by J. Alexis et al [36] in the horizontal and vertical directions showing a difference of 2.59 and 6.34% for the yield strength and ultimate tensile strength, respectively. C. Saldana et al [37] concluded that the build orientation effect on mechanical properties of DED-produced 316 did not have statistical significance, according to the ANOVA method, in the samples' ultimate tensile strength. The disparity in the results within the horizontal direction is considerable, with the yield strength oscillating between 810.5 and 1029.1 MPa.…”

Section: Ni300 Mechanical Characterisationmentioning

confidence: 99%

Tensile Properties of As-Built 18Ni300 Maraging Steel Produced by DED

et al. 2022

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The mechanical behaviour of as-built DED-produced 18Ni300 Maraging steel was studied by manufacturing a wall-like structure from which three different specimen types were obtained: specimens in which the loading direction was the same as the printing direction (vertical), specimens in which these two directions were perpendicular (horizontal), and bimetallic specimens in which the interface between the AISI 1045 substrate and the 18Ni300 steel was tested. The yield strength of the produced samples was 987.9±34.2, 925.9±89.7 and 486.7±47.2MPa for the vertical, horizontal and bimetallic specimens, respectively, while the elongation to failure was 9.4±1.9, 18.3±2.3 and 14.06±0.6% in the same order. The latter specimen failed within the substrate-comprised portion of the specimen. Additionally, the fracture surfaces were analysed through scanning electron microscopy, concluding that while both surfaces consist of dimples, the horizontal specimen presented microporosities with a reduced diameter. A microhardness analysis in the printed wall-like structure following the printing direction yielded an average hardness of 392±21 HV0.3, with fluctuations along the build direction mostly within one standard deviation.

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Section: Ni300 Mechanical Characterisationmentioning

confidence: 99%

Tensile Properties of As-Built 18Ni300 Maraging Steel Produced by DED

et al. 2022

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“…7 Process plan alternatives generated for the particular case study treatment. Although 316L cannot be heat treated, AM of 316L alloys has been successfully used in the past [32][33][34][35][36][37], even for repair purposes [38], and its fatigue life has been deemed satisfactory [39][40][41]. The processes used in this case are DLM, milling, and vision-based metrology, but additional processes could be considered as appropriate.…”

Section: Case Studymentioning

confidence: 99%

Hybrid subtractive–additive manufacturing processes for high value-added metal components

Stavropoulos

Bikas

Avram

et al. 2020

Int J Adv Manuf Technol

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Hybrid process chains lack structured decision-making tools to support advanced manufacturing strategies, consisting of a simulation-enhanced sequencing and planning of additive and subtractive processes. The paper sets out a method aiming at identifying an optimal process window for additive manufacturing, while considering its integration with conventional technologies, starting from part inspection as a built-in functionality, quantifying geometrical and dimensional part deviations, and triggering an effective hybrid process recipe. The method is demonstrated on a hybrid manufacturing scenario, by dynamically sequencing laser deposition (DLM) and subtraction (milling), triggered by intermediate inspection steps to ensure consistent growth of a part.

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“…18 Characterizing the pores in an AM part, before testing procedures occur, gives insight to information that would otherwise be completely unknown until the testing was concluded. 19 For AM parts, CT scanning has proven to be very useful in understanding the benefits, and consequences, of using AM for repairs. 20 Stress intensity factor (SIF) values are representative of the significance of the stress in each location, and it accounts for the consequences of having pores in these locations as well.…”

Section: Introductionmentioning

confidence: 99%

“…Since AM remains as a field that requires a significant amount of research and development, CT analysis is valuable in exploring the unknown effects of processing parameters on the performance of a specimen 18 . Characterizing the pores in an AM part, before testing procedures occur, gives insight to information that would otherwise be completely unknown until the testing was concluded 19 . For AM parts, CT scanning has proven to be very useful in understanding the benefits, and consequences, of using AM for repairs 20 …”

Section: Introductionmentioning

confidence: 99%

Vibration bending fatigue analysis of Ti‐6Al‐4V airfoil blades repaired using additive manufacturing

Smith,

Scott‐Emuakpor,

Gockel

et al. 2024

Fatigue Fract Eng Mat Struct

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The repair of airfoil blades is an enabling technology to extend the operational life of gas turbine engines. Directed energy deposition (DED) additive manufacturing (AM) provides the ability to add material by melting blown powder using a directed energy source. Seventeen Ti‐6Al‐4V airfoil blades were repaired using DED AM and analyzed to determine what effect the repair will have on the blade performance in high cycle vibration fatigue testing. Volumetric computed tomography (CT) was used to quantify the pores from the AM process. The blades were then subjected to vibrational bending fatigue, used to simulate turbine engine loading conditions, until failure. Only three blades failed in the repaired sections. The identified pore sizes and fatigue stress distribution in the blade were used to suggest that understanding the impact of internal and near surface level pores arising from the AM repair is critical towards the implementation of AM repair in aerospace components under fatigue loading.

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Build Orientation Effects on Mechanical Properties of 316SS Components Produced by Directed Energy Deposition

Cited by 16 publications

References 12 publications

Tensile Properties of As-Built 18Ni300 Maraging Steel Produced by DED

Tensile Properties of As-Built 18Ni300 Maraging Steel Produced by DED

Hybrid subtractive–additive manufacturing processes for high value-added metal components

Vibration bending fatigue analysis of Ti‐6Al‐4V airfoil blades repaired using additive manufacturing

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