No, you should not put a blender in the microwave after blending. Microwaves are designed to heat food using electromagnetic radiation, while blenders are used for chopping, blending, and mixing ingredients. Blenders typically have electrical components and a motor that can be damaged or pose a safety hazard if exposed to the microwave's heat and radiation. Additionally, the microwave could potentially cause the blender's plastic or metal parts to melt or catch fire.
It's important to use appliances for their intended purposes and to follow the manufacturer's instructions and safety guidelines to ensure proper and safe usage.