Equal-Channel Angular Extrusion of Beryllium

Author: Field R.D.   Hartwig K.T.   Necker C.T.   Bingert J.F.   Agnew S.R.  

Publisher: Springer Publishing Company

ISSN: 1543-1940

Source: Metallurgical and Materials Transactions A, Vol.33, Iss.3, 2002-03, pp. : 965-972

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Abstract

The equal-channel angular extrusion (ECAE) technique has been applied to a powder metallurgy (P/M) source Be alloy. Extrusions have been successfully completed on Ni-canned billets of Be at approximately 425 °C. No cracking was observed in the billets, and significant grain refinement was achieved. In this article, microstructural features and dislocation structures are discussed for a single-pass extrusion, including evidence of 〈c〉 and 〈c + a〉 dislocations. Significant crystallographic texture developed during ECAE, which is discussed in terms of this unique deformation processing technique and the underlying physical processes which sustain the deformation.