Examination of Dynamic Strain Ageing Effects during Rapid Quenching of Inconel 718 Superalloy Disc

Abstract:

In this work, an experimental measurement, contour method, is implemented for an after quenching IN718 forging specimen to obtain the distribution of residual stress field. A sequentially coupled thermal mechanical finite element model is developed with the similar 3D geometry of the experimental specimen and implemented the same heat transfer boundary of the rapid quenching with the experimental condition. A thermal mechanical rate dependent continuum plasticity model for IN718 alloy, with the dynamic strain ageing (DSA) effect incorporated, is developed to study the impact of DAS effect on the evolution of residual stress during rapid quenching. The modelling predictions of residual stress are in good agreement with the contour method measurements. The impact of DSA effect is further quantified, indicating that an annular high plastic strain rate region in the core part of the disc is captured during the simulation of the quenching process.

• Periodical: Solid State Phenomena (Volume 315)
• Pages: 77-83
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.315.77
• Online since: March 2021
• Authors: Run Hua Song, Dong Feng Li*, Esteban P. Busso, Jun Wei, Hai Long Qin, Zhongnan Bi, Ji Zhang
• Keywords: Contour Method, Dynamic Strain Ageing, Inconel 718, Rapid Quenching, Residual Stress

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