The effects of hot isostatic pressing (HIP) and solubilization heat treatment on the density, mechanical properties, and microstructure of austenitic stainless steel parts produced by selective laser melting (SLM)

Corrosion of Additively Manufactured Stainless Steels—Process, Structure, Performance: A Review

“…More recent studies, however, have shown that full densification (>99.99%) is possible using HIP for AM steel that has an initial density of >99% density. [151][152] The few studies to date on corrosion of HIP-treated AM SS, specifically SLM 316L, show both detrimental and beneficial effects of HIP, dependent on environment and degradation mode. Work by Geenan, et al, shows generally diminished resistance of HIP-treated SLM 316L relative to as-built in 0.5 M sulfuric acid, with activation and passive current densities 10 times higher than the as-built material.…”

A Review of the Selective Laser Melting Lattice Structures and Their Numerical Models

“…[ 85 ] Liverani et al investigated the influence of both HIP at various elevated pressures and a solubilization heat treatment on the mechanical properties, hardness, and microstructure of SLM austenitic stainless‐steel parts AISI316L. [ 86 ] Their findings showed that solubilization heat treatment has no significant impact on the microstructure of the material, and the HIP postprocessing is capable of producing a defect‐free component only if the initial density is high (at least 99%). Sarkar et al demonstrated that standard aging condition (H900) made SLM 15‐5 PH SS parts brittle with high yield strength, high wear rate, high hardness, low tensile strain, and low impact energy.…”

Influence of warm isostatic press (WIP) process parameters on mechanical properties of additively manufactured acrylonitrile butadiene styrene (ABS) parts

“…Furthermore, the PBFed STS 316L, NiAl-Cr-Mo alloy, EP741NP nickel alloy, Co-Cr-Mo alloy, and Inconel 625 alloy were taken through the HIP process at temperatures above 1000 °C and pressures above 1000 bar after the PBF process. The experiments demonstrated that the HIP process is positive in terms of physical properties [33,[36][37][38][39][40]. The results mentioned above show that temperature and pressure are effective in reducing the internal voids generated during the metallic PBF process, and the optimal condition of the temperature and pressure should be determined by the type of materials.…”