Single crystal metal deposition using laser additive manufacturing technology for repair of aero-engine components

Kumar, S. Anand; Rajkumar, V.; Nagesha, B.K.; Tigga, Amit Kumar; Barad, Sanjay; Suresh, T.N.

doi:10.1016/j.matpr.2021.02.083

Cited by 20 publications

(1 citation statement)

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“…Nickel-based superalloys are widely used in high-temperature applications, especially in the aerospace and energy industries. Due to its good structural stability, superior high-temperature strength, and oxidation resistance, it has become one of the irreplaceable components in high-temperature applications, such as turbine blades, engine discs, and gas turbines [1][2][3][4]. With the continuous development of aerospace technology, the function, structure and performance of its components have been put forward more stringent requirements, the integration of structure molding is conducive to improve the functional, lightweight, and mechanical properties of aviation components.…”

Section: Introductionmentioning

confidence: 99%

High Strain Rate Yielding of Additive Manufacturing Inconel 625 by Selective Laser Melting

Yang

et al. 2021

Materials

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Nickel-based alloy Inconel 625, produced by the selective laser melting method, was studied experimentally for its mechanical performance under strain rate loading using Hopkinson bars. Both compression and tensile tests were carried out, with the former also being conducted at 500 °C. The strain rate was in the range of 300 to 3500 s−1 at ambient temperature, and 1200 to 3500 s−1 at the elevated temperature, respectively, for compression tests, and 900 to 2400 s−1 for tensile tests. Results show that the alloy has a strong rate sensitivity with the dynamic yield stress at 3500 s−1, almost doubling the quasistatic value. The test results also show that, even though the temperature elevation leads to material softening, the strain rate effect is still evidential with the dynamic compressive yield stress at the rate 103 s−1 and 500 °C still being higher than the quasistatic one at ambient temperature. It is also observed that dynamic tensile strengths are generally higher than those of compressive ones at room temperature.

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Section: Introductionmentioning

confidence: 99%