Severe plastic deformation by incremental angular splitting

Rosochowski, Andrzej and Rosochowska, Malgorzata and Olejnik, Lech (2013) Severe plastic deformation by incremental angular splitting. Journal of Materials Science, 48 (13). pp. 4557-4562. ISSN 0022-2461

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Abstract

A new way of generating large plastic strain in a billet by splitting it plastically by a reciprocating punch is investigated. The concept of incremental angular splitting (I-AS) is explained by referring to the severe plastic deformation process of incremental equal channel angular pressing (I-ECAP). Results of laboratory trials of I-ECAP and I-AS, using a purposely designed AA1070 billet, are presented and both processes compared. Further comparison is based on Vickers hardness distribution in the billet subjected to I-ECAP and I-AS. FE simulation results give an indication of strain distribution in both processes. The main advantages of I-AS appear to be more flexibility in the billet choice and more uniform strain distribution in the first pass of the process. A possibility of creating a gradient material by I-AS with a flat punch is considered.