2026-05-01T04:13:57Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/64122024-05-24T11:21:58Zcom_20.500.11984_473col_20.500.11984_478

00925njm 22002777a 4500 dc Elguezabal Lazcano, Borja author 2023 The prediction of the distortions during Near-Net-Shape Hot Isostatic Pressing (NNS-HIP) is an intrinsic multiscale problem where the local interactions among particles determine the macroscopic distortions taking place during the sintering and densification of a component. In this work, a multiscale approach is proposed to solve this problem. In particular, a viscoplastic constitutive model capable of predicting macroscopic contractions during a HIP process with high accuracy has been developed, implemented and validated. The macroscopic model incorporates the mechanical behaviour predicted at the meso-scale by means of multiple-particle finite element models (MP-FEM) of an agglomerate of powder particles. The model is validated through the prediction of distortions during HIP of a full scale industrial case. It is concluded that adding the microscopic information of the HIP process to simulate the contractions at the macroscopic level results in a considerable improvement of the accuracy of the predictions. 0032-5910 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=177406 https://hdl.handle.net/20.500.11984/6412 Powder compaction Finite element method Hot isostatic pressing Mesoscopic analysis Experimental characterization A multiscale material model for metallic powder compaction during hot isostatic pressing