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contributor authorGitschel, Robin
contributor authorHering, Oliver
contributor authorSchulze, André
contributor authorErman Tekkaya, A.
date accessioned2023-11-29T19:19:43Z
date available2023-11-29T19:19:43Z
date copyright12/1/2022 12:00:00 AM
date issued12/1/2022 12:00:00 AM
date issued2022-12-01
identifier issn1087-1357
identifier othermanu_145_1_011011.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4294698
description abstractIt is investigated to what extent the evolution of ductile damage in cold forging can be controlled without changing the geometry of the produced part. Besides the effects of strain hardening and residual stresses, damage, which is the nucleation, growth and coalescence of voids on microscopic level, affects product properties of the manufactured components such as fatigue strength, impact strength, or elastic stiffness. Former investigations have shown that the load path-dependent damage evolution in forward rod extrusion, and thus, the performance of produced parts can be controlled by the process parameters extrusion strain and shoulder opening angle. As these parameters also affect the geometry of extruded parts, design requirements of components might be violated by varying these. Thus, counterpressure is used to superpose purely hydrostatic stresses to forward rod extrusion in order to decrease triaxiality in the forming zone without causing geometric variations in the produced parts. The counterpressure is either introduced by a counterpunch or by modified process routes. The achieved improvements in product performance are in agreement with results obtained by variation of extrusion strain and shoulder opening angle as described in the literature. In addition, it is observed in tensile tests that damage in cold extruded parts does not significantly affect flow stress. All advancements in product performance are realized without affecting the products’ geometries.
publisherThe American Society of Mechanical Engineers (ASME)
titleControlling Damage Evolution in Geometrically Identical Cold Forged Parts by Counterpressure
typeJournal Paper
journal volume145
journal issue1
journal titleJournal of Manufacturing Science and Engineering
identifier doi10.1115/1.4056266
journal fristpage11011-1
journal lastpage11011-9
page9
treeJournal of Manufacturing Science and Engineering:;2022:;volume( 145 ):;issue: 001
contenttypeFulltext


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