Failure of turbine rotor blisk of an aircraft engine

Bhaumik, SK; Bhaskaran, TA; Rangaraju, R; Venkataswamy, MA; Parameswara, MA; Krishnan, RV

doi:10.1016/s1350-6307(01)00017-6

Cited by 51 publications

(25 citation statements)

References 12 publications

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“…11a, b), revealing weak {100} crystallographic planes in the Mar-M247 alloy (Ref 21). This type of fracture is typical to the cast Ni superalloys, (Ref 22,23). Cleaved surfaces of large fractured carbide particles are also observed in noticeable amounts, supporting our earlier suggestion that these particles are probably responsible for the fracture of the Mar-M247 alloy.…”

Section: Microstructure Of the Ifw Specimens After Room Temperature Dsupporting

confidence: 84%

Site-Dependent Tension Properties of Inertia Friction-Welded Joints Made From Dissimilar Ni-based Superalloys

Senkov

Mahaffey

Semiatin

et al. 2015

J. of Materi Eng and Perform

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Microstructure, tensile properties, and fracture behavior of the inertia friction weld joints of dissimilar superalloys, cast Mar-M247 and wrought LSHR, were studied to assess the weld quality. Tensile tests were conducted at 23 and 704°C on the samples containing different areas of the weld interface of the same welded material. The stress-strain curves were registered at different axial distances from the weld interface. In all tested samples, plastic deformation was localized on Mar-M247 side, outside the heat-affected zone (HAZ), and the resistance to plastic deformation of Mar-M247 increased with a decrease in the distance from the weld interface inside HAZ. Only elastic deformation occurred on the LSHR side. Fracture occurred on the Mar-M247 side, outside HAZ, or at the weld interface. In the latter case, welding defects in the form of clusters of nanometer-sized oxide and carbide particles were observed at the fracture surfaces. These results revealed that the IFW process is capable of producing the weld joints between Mar-M247 and LSHR with the fracture strength higher than that of Mar-M247. However, optimization of the IFW processing parameters is required to minimize clustering of oxide/carbide particles at the weld interface in this alloy pair.

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Section: Microstructure Of the Ifw Specimens After Room Temperature Dsupporting

confidence: 84%

Site-Dependent Tension Properties of Inertia Friction-Welded Joints Made From Dissimilar Ni-based Superalloys

Senkov

Mahaffey

Semiatin

et al. 2015

J. of Materi Eng and Perform

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“…Crack failures continually occur in fan blades, which cause interruption of operation and increase costs, decrease product quality, and affect the safety of operators [1][2][3]. Fault detection for blades of rotating machinery at earlier stage can prevent it from breaking down and reduce maintenance time.…”

Section: Introductionmentioning

confidence: 99%

Crack Detection of Fan Blade Based on Natural Frequencies

Gao

et al. 2018

International Journal of Rotating Machinery

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A simple method was developed to detect damage based on a discrete mathematical model for fan blades using changes in natural frequencies combined with a fluid-structure analysis. In addition, a numerical approach was developed for the fluid-structure analysis. The results of numerical simulation provided the natural frequency data for each mode under different locations and sizes of a single crack in a blade. A fault database was built using Matlab. The damage of a blade was detected using the changes in natural frequencies. This study will assist in investigating the effect of a crack on a structure from different perspectives; the simulation results show the effectiveness of this approach.

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“…Advances in manufacturing techniques have enabled integrally bladed disk designs. These designs are highly susceptible to high cycle fatigue as they are inherently low damped [12].…”

Section: Introductionmentioning

confidence: 99%

Active Stiffness Method for High Cycle Fatigue Mitigation using Topical Thin Foil Shape Memory Alloy

Garafolo¹,

Collard²

2017

JMDV

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The strong need for high cycle fatigue mitigation has resulted in numerous techniques resulting in added weight, increased operational costs, and lower performance. The experimental investigation presented was a foundational effort towards mitigating HCF through the use of shape memory alloy in a composite system. The research objective was to quantify changes in eigenvalue, eigenvector, and amplitude of a vibrating cantilever beam with a thin SMA topical treatment; as quantified during SMA phase transformations and through comparison with a control. A composite beam consisting of a nitinol thin SMA foil adhered to an Aluminum Alloy 6061 substrate was designed and fabricated. The three configurations were utilized: (1) a full-span SMA treatment designed for maximum eigenvalue shift and maximum amplitude reduction, (2) a half-span SMA treatment designed for eigenvector shift, and (3) a full-span aluminum treatment for a control. Through a complete modal analysis, results illustrated that thin foil SMA treatments led to a significant shift in eigenvalue, up to 6.53%. Highlighting the reduction in amplitude was a 92% reduction in amplitude at second bending with constant excitation frequency with the full-span sample. Spanwise scans on the half-span sample with and without SMA actuation illustrated a 0.77% shift in node location.

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Failure of turbine rotor blisk of an aircraft engine

Cited by 51 publications

References 12 publications

Site-Dependent Tension Properties of Inertia Friction-Welded Joints Made From Dissimilar Ni-based Superalloys

Site-Dependent Tension Properties of Inertia Friction-Welded Joints Made From Dissimilar Ni-based Superalloys

Crack Detection of Fan Blade Based on Natural Frequencies

Active Stiffness Method for High Cycle Fatigue Mitigation using Topical Thin Foil Shape Memory Alloy

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