Failure Analysis of Cast Tubular Specimens of Al 5Zn 1Mg While Processing at Room Temperature by Equal Channel Angular Pressing (ECAP)

Abstract

The ECAP process is a promising technique for imparting large plastic deformation and breaking down the ingot cast structure without a resultant decrease in cross-sectional area. In the present study, the suitability of this technique for processing cast Al 5Zn 1Mg tubular specimens at room temperature has been investigated. Tubular specimens were extruded through an ECAP die with an angle of 150 between the two intersecting channels without a back pressure. Sand was used as a mandrel during pressing. The tubular specimens failed miserably in the first pass itself. A failure analysis was carried out using SEM, and cause for failure was determined. 2014, ASM International.