Research on the Formation Mechanism for Formation Mechanism for Formation Mechanism for Micro-Damage of Alloy Blades of Wedge

Central damage is the serious defect of horizontal wedge rolling products. The method of combining testing and numerical simulation is used to study the mechanism of central Damage. It represents the evolution process of the start, growth and agglomeration of the GH4169 alloy blades in the horizontal wedge rolling process, and combines the microre porosity shape with the stress-strain state to reveal the mechanism of central Damage. On the basis of analyzing the stress and strain characteristics of the forging center, the effect of mold process parameters on the center damage was studied. Studies have found that the micropores of the center of the forged blank are formed around non-metal miscellaneous objects. Through growth and agglomeration, it becomes a macro-damage in the direction of shear stress and stress, Causes center damage.