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RESEARCH PRODUCT

Influences of atomization process and precursor material on the compaction mechanisms and metallurgical properties of parts developed by HIP

subject

description

Hot Isostatic pressing process is based on the densification of metals powders to near net shape parts with higher mechanicals properties than forged chemical equivalent. The precursor material can influence the parts properties. Thus the aims of this these is to understand the influence of the powder properties on the HIP parts. The particles characterization and the elements and compound monitoring during the HIP cycle allowed to understand the different oxidations phenomenons and their impact on the mechanical properties of parts. The comparison of differents powders batches with identical particles size repartition or identical chemical composition showed that the chemical composition affect the phases and the grains size of the material while the particle grains size repartition only affect the compaction rate. These results bring a possibility of deformations optimization during HIP to manufactured near net shape part whit high mechanical properties. Models developed in this study allow an identification of the batch utilization in accordance with its properties.