Review of Significant Features  
scene 10 of 10

The graph plots stress versus strain. The curve starts at the bottom left of the viewing window at the origin, goes up and to the right with a constant steepness and then goes slightly to the right. The curve then goes up and to the right with increasing steepness, reaches a maximum and then goes down and to the right with increasing steepness and ends at the top right of the viewing window. The region corresponding to the transition from linear to nonlinear is highlighted on the graph and is labeled yield. The captions on the right are: A slight increase in stress causes a marked increase in strain. Beginning at yield, the material is permanently altered. Only a portion of the strain will be recovered after the stress has been removed. The yield strength is an important design parameter for the material.