What is a yield point? What is a yield strength?

(N/A) $1$. Yield Point: The yield point is the point on the stress-strain curve beyond which the material starts to deform plastically. Up to this point,the material exhibits elastic behavior,meaning it will return to its original shape once the deforming force is removed. Beyond the yield point,the material undergoes permanent deformation.
$2$. Yield Strength: The yield strength is defined as the value of stress corresponding to the yield point. It represents the maximum stress a material can withstand without undergoing permanent plastic deformation. It is a critical parameter in engineering design to ensure that structural components remain within their elastic limits under operational loads.