On the Impact of an Integrated HIP Treatment on the Very High Cycle Fatigue Life of Ni-Based SX Superalloys

Luciana Maria Bortoluci Ormastroni,Inmaculada Lopez-Galilea,Benjamin Ruttert,Sebastian Weber,Florent Mauget,Patrick Villechaise,Jonathan Cormier

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE（2022）

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摘要

The influence of an integrated hot isostatic pressing (HIP) treatment was investigated for two single-crystalline nickel-based superalloys under very high cycle fatigue at 1000 °C in fully reversed conditions ( R ε = − 1). The fatigue life is improved significantly by performing heat-treatments within the HIP unit. The HIP-compacted pore morphology and its impact on the crack initiation is considered as well. The HIPed specimens fail at low-angle grain boundary structures that have developed around the compacted casting pores.

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关键词

high cycle fatigue life,integrated hip treatment,ni-based

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