Optimierung der HIP-Parameter unter Berücksichtigung der Verdichtungsmechanismen

Abstract

The knowledge of high-temperature deformation mechanism in crystalline materials is applied to powder densification by hot-isostatic pressing (HIP). It turns out that, depending on the HIP conditions and the amount of densification, dislocation or diffusion mechanisms provide the densification. The prevailing densifying mechanism controls the shape of remaining pores and thus exerts an influence on the mechanical properties of the final HIP product. Using mechanism diagrams ("HIP maps"), the practical application of these considerations in the optimization of HIP process parameters is illustrated.