Bad wheel bearings usually cause a grinding noise, and are known to only cause it when turning.
most grinding noises that come from turning is usually a cv axle that needs to be replaced. Can also be a bad wheel bearing. If you hear the grinding when turning to the right then the left front wheel bearing is bad.
Are the breaks worn or have they been recently replaced and could need new rotor. check your wheel bearing as well. turning left puts more stress on the right side of the vehicle, this could cause the grinding noise.
bad rack and pinion
If its making a horrible grinding noise, it could be the bearing!
Defective left front wheel bearing. Have this repaired ASAP, as it can cause an accident.
right side lower ball joint or possible cv shaft
The grinding is a worn CV joint. Get it replaced before it causes more damage! A worn wheel bearing will make the same noise answer worn wheel bearings or worn brake pads will be the cause
have it checked you could have bent the axle and the noise would be the bearing
If its front wheel drive possibly an axle.
Check the brakes for worn pads. The pad backer scraping the rotor is the most common cause of this type of noise.
Many things can cause that, the simplest cause being lack of power steering fluid.