A combination of severe plastic deformation by equal channel angular pressing (ECAP) and bake hardening (BH) was used to produce high strength ultrafine-grained AA6061 aluminum alloy. 2, 4 and 8 passes of ECAP were performed, and the bake hardenability of samples was tested by 6% pre-straining followed by baking at 200 °C for 20 min. The microstructures obtained for various passes of ECAP were characterized by XRD, EBSD, and TEM techniques. The microstructures were refined from an average grain size of 20 µm to 212 nm after 8 passes of ECAP. Maximum bake hardenability of 110 MPa, and final yield stress of 330 MPa were obtained in the specimens processed by 8 passes of ECAP.


Materials Science and Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

Aluminum; Aluminum alloys; Grain size and shape; Hardening; High strength alloys; Microstructure; Pressing (forming); Yield stress; Average grain size; Bake hardenability; Bake hardening; ECAP; High strength aluminum alloys; Pre-straining; Severe plastic deformations; Ultra-fine-grained; Equal channel angular pressing

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2015 Elsevier, All rights reserved.

Publication Date

01 Feb 2015