EQUAL CHANNEL ANGULAR EXTRUSION (ECAE) OF BERYLLIUM.

Conference · Mon Jan 01 00:00:00 EST 2001

OSTI ID:975320

Field, R D ^[1]; Hartwig, K T; Necker, C T ^[2]; Bingert, J F ^[3]; Agnew, S R ^[4]

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1. Richard D.
2. Carl T.
3. John F.
4. Sean R.

The Equal Channel Angular Extrusion (ECAE) technique has been applied to a P/M source Be alloy. Single and two-pass extrusions have been successfully completed, using two different processing routes, on Ni-canned billets of Be at 400 C. No cracking was observed in the billet and significant grain refinement was achieved. In this paper, microstructural features and dislocation structures are discussed for the single-pass material, including evidence of <c> and <c+a> dislocations. Significant crystallographic texture developed during ECAE, which will be discussed in terms of this unique deformation processing technique and the underlying physical processes which sustained the deformation.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• OSTI ID: 975320
• Report Number(s): LA-UR-01-2514; TRN: US201008%%173
• Resource Relation: Conference: Submitted to: Metallurgical and Materials Transactions A (proceedings of the "Defects, Properties and Mechanical Behavior of HCP Metals and Alloys" Symposium, TMS 2001 Annual Meeting)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
BERYLLIUM
DEFECTS
DEFORMATION
DISLOCATIONS
EXTRUSION
GRAIN REFINEMENT
PROCESSING
TEXTURE