What kind of defects could occur in:
a. Extrusion
b. Rolling
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Mechanical Engineering
What kind of defects could occur in: a. Extrusion b. Rolling
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a Extrusion defects The defects in extruded products can be classified into three categories Center burst Piping and Surface cracking 1 center burst Center burst defect is an internal crack that develops as a result of tensile stresses along the center line of the workpart during the extrusion process Although tensile stresses may not usually be seen in a compression process such as extrusion process tensile stresses tend to occur under conditions that cause large deformation in the regions of the work away from the central axis The significant amount of material movement in these outer regions stretches the material along the center of the product If the stresses are high a bursting occurs Conditions that promote center
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