Influence of initial heat treatment on the microhardness evolution of an Al-Mg-Sc alloy processed by high-pressure torsion
Authors: Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Journal: Materials Science Forum
Volume: 879
Pages: 1471-1476
eISSN: 1662-9752
ISBN: 9783035711295
ISSN: 0255-5476
DOI: 10.4028/www.scientific.net/MSF.879.1471
Abstract:An Al-3% Mg-0.2% Sc alloy was subjected to annealing or solution treatment and further processed by HPT at room temperature. Microhardness measurements were taken along the middle-sections of the discs and they demonstrated that a very substantial hardening is achieved during HPT processing regardless of the initial heat treatment. Hardness values of ~200 Hv were recorded at the edge of the samples although the microhardness distribution remained inhomogeneous along the diameters of the discs after 20 turns of high-pressure torsion. In addition, the microhardness of the solution treated Al-Mg-Sc samples continued to increase with the equivalent strain imposed by the anvils even after 30 turns of HPT processing whereas the hardness at the edges of the annealed discs saturated after 10 turns. These differences in the hardness evolution are attributed to the higher Mg content in solid solution in the case of the solution treated samples and its influence on delaying the recovery rate of this aluminium alloy.
Source: Scopus
Influence of initial heat treatment on the microhardness evolution of an Al-Mg-Sc alloy processed by high-pressure torsion
Authors: Pereira, P.H.R., Huang, Y. and Langdon, T.G.
Conference: THERMEC 2016: 9th International Conference on Processing & Manufacturing of Advanced Materials
Dates: 29 May-3 June 2016
Journal: Materials Science Forum
Volume: 879
Pages: 1471-1476
eISSN: 1662-9752
ISBN: 9783035711295
ISSN: 0255-5476
DOI: 10.4028/www.scientific.net/MSF.879.1471
Abstract:© 2017 Trans Tech Publications, Switzerland. An Al-3% Mg-0.2% Sc alloy was subjected to annealing or solution treatment and further processed by HPT at room temperature. Microhardness measurements were taken along the middle-sections of the discs and they demonstrated that a very substantial hardening is achieved during HPT processing regardless of the initial heat treatment. Hardness values of ~200 Hv were recorded at the edge of the samples although the microhardness distribution remained inhomogeneous along the diameters of the discs after 20 turns of high-pressure torsion. In addition, the microhardness of the solution treated Al-Mg-Sc samples continued to increase with the equivalent strain imposed by the anvils even after 30 turns of HPT processing whereas the hardness at the edges of the annealed discs saturated after 10 turns. These differences in the hardness evolution are attributed to the higher Mg content in solid solution in the case of the solution treated samples and its influence on delaying the recovery rate of this aluminium alloy.
Source: Manual
Preferred by: Yi Huang