After additively manufacturing a part, many manufacturers will perform Hot Isostatic Pressing (HIP) to remove pores...

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Mechanical Engineering

After additively manufacturing a part, many manufacturers willperform Hot Isostatic Pressing (HIP) to remove pores from thematerial. These pores form naturally as part of the process ofadditive manufacturing, and negatively affect the fatigue life andmechanical properties of the part. After HIP, the material oftenbecomes soft since the high temperature of the process also removesthe microstructure.
What process would you use to strengthen the material after theHIP process without changing shape of the part, and why?

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4.4 Ratings (812 Votes)

I would recommend going for heat treatment process after Hot Isostatic Pressing. Unlike strengthening mechanisms like forming operations, heat treatment does not change the shape of the part but changes microstructure to bring desired properties. We can perform annealing operation to improve the strength of the component.

Annealing involves reheating to a temperature below its melting point and then allowing to slowly cool. This reheating causes smaller crystals to form within the larger original grains. This tighter crystalline matrix makes the metal stronger and increases ductility. The metalâ€™s shape hasnâ€™t been changed, but its desirable characteristics have been increased.

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