Hot Isostatic Pressure (HIP) means simultaneous application of high pressure (1000-2000 bars) and high temperature (500 to 2000°C) under isostatic conditions in an inert atmosphere (Ar gas).
Under these conditions of heat and pressure, internal pores or defects collapse, and encapsulated powders shrink and diffusion occurs to produce a fully dense component.
HIP Process
Hot Isostatic Pressing is a process which is used to consolidate metal powder or to eliminate defects in solids such as pores, voids and internal cracks, thus densifying the material to 100% of the theoretical density.
The most pronounced benefit of removing printing defects by HIP is that the fatigue properties can be improved since the stress concentrations from the defects are eliminated.
![before HIP treatment](http://www.3dmedical.fr/wp-content/uploads/2020/10/before-HIP.jpg)
Before HIP
![After HIP treatment](http://www.3dmedical.fr/wp-content/uploads/2020/10/after-HIP.jpg)
After HIP
Why HIP is important in 3D Printed parts
- 100% of theoretical density
- Pores eliminating
- Ducility and fatigue resistance increasing
- Consolidation of Titanium powder and diffusion bonding of dissimilar metals or alloy
- Longer life time