Home FOR AUTHORS Kovove Materialy-Metallic Materials 2011 Metallic Materials Vol. 49 (2011), no. 4, pp.271-277

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Metallic Materials Vol. 49 (2011), no. 4, pp.271-277

Title: Effect of Al alloying on the Hall-Petch strengthening and AE in compressed Mg-Li-Al alloys before and after HPT processing
Author: S. KUDELA, A. PAWELEK, Z. RANACHOWSKI, A. PIATKOWSKI, S. KUDELA, P. RANACHOWSKI

Abstract: The paper deals with the effect of Al content in two-phase Mg-10Li-xAl (x = 0, 1, 5) alloys on their straining behavior before and after severe plastic deformation by high pressure torsion. Both coarse-grained and ultrafine-grained alloys were compression strained in channel-die device with simultaneous acoustic emission monitoring. It has been observed that Hall-Petch strengthening in ultra-fine grained alloys superposes with the strengthening resulting from Al alloying (solution hardening, particulate strengthening). Superposition of these strengthening mechanisms becomes stronger with increase in Al content, presumably due to enhanced grain refining effect.

Keywords: Mg-Li-Al alloys, grain refinement, high pressure torsion, acoustic emission, Hall-Petch strengthening
Year: 2011, Volume: 49, Issue: 4 Page From: 271, Page To: 277
doi:10.4149/km_2011_4_271


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