If you press on the brake pedal while going around turns does it go away? If it does then probably your break pads are wearing down and are rattling. By pressing on the pedal you will stop them from rattling. BUT, if it doesn't go away it could be the CV joint. Usually they click "very" noticebly while going around corners. A garage can check this by lifting the front wheels off the ground and with the engine running, put it in gear and let the front wheels turn. Then when you turn the steering wheel to "full" left and then right. You will hear the noise coming from the bad "left or right" CV joints if they are bad.