Bauschinger Effect
The Bauschinger effect refers to a property of materials where the material's stress/strain characteristics change as a result of the microscopic stress (physics), stress distribution of the material. For example, an increase in tensile yield strength occurs at the expense of compressive yield strength. The effect is named after German engineer Johann Bauschinger. While more tensile cold working increases the tensile yield strength, the local initial compressive yield strength after tensile cold working is actually reduced. The greater the tensile cold working, the lower the compressive yield strength. It is a general phenomenon found in most polycrystalline metals. Based on the cold work structure, two types of mechanisms are generally used to explain the Bauschinger effect: # Local back stresses may be present in the material, which assist the movement of Dislocation, dislocations in the reverse direction. The pile-up of dislocations at grain boundaries and precipitation harden ...
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