How are Alloy 2117 rivets treated before they are driven?

Alloy 2117 rivets are typically heat treated by the manufacturer to enhance their mechanical properties prior to being driven. This heat treatment process modifies the microstructure of the alloy, improving its strength and ensuring that the rivets will perform effectively under the conditions they are subjected to in service. The heat treatment process is crucial because it prepares the rivets to provide the necessary durability and resistance to fatigue once they are installed.

This approach eliminates the need for additional heat treatment or modifications at the time of installation, ensuring that the rivets are ready to use right out of the package. The other choices do not accurately describe the process for Alloy 2117 rivets. For example, they do not come unmodified and require post-treatment, nor do they undergo cold working after being driven. These distinctions highlight the importance of effective pre-treatment in the production and use of Alloy 2117 rivets.