Abstract
The interaction of soaking temperature and hydrostatic pressure on the evolution of creep cavities under hot isostatic pressing (HIP) for a nickel-based superalloy is investigated. The concentrically-oriented γ′ rafting structure occurs around the cylindrical creep cavity under 1453K/150MPa/1h. The cylindrical cavity also tends to break into a row of spherical voids due to the classical Rayleigh instability. HIP temperature and pressure, acting as two driving factors for solute diffusion, interact and influence the healing behavior of creep cavities.
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