Effect of Mn on the Nanoprecipitation in Binary Fe-Cu alloys

Rajashekhara Shabadi (1) , Roland Taillard , Bertrand Radiguet (2) , Jérémie de Baerdemaeker , Elke Leunis

1 UMET - Unité Matériaux et Transformations - UMR 8207
2 GPM - Groupe de physique des matériaux

Effect of the third alloying element Mn on Cu-precipitation was studied in a binary Fe-1.3% Cu alloy. Precipitation in both the alloys was investigated after homogenization treatment and subsequent artificial aging. Advanced characterization techniques such as Positron Annihilation Spectroscopy (PAS) and Tomographic Atom Probe (TAP) were used to establish the chemical composition, morphology, size and number density of the Cu-rich phases. Combined results of PAS and TAP were particularly useful in order to follow the Cu precipitation in the binary alloy. At short aging times, addition of Mn significantly increased the kinetics of hardening while its effect on the magnitude of precipitation strengthening is only marginal. It further increases the over-aging kinetics.

Keywords: Cu Precipitation; Fe-Cu; Positron Annihilation Spectroscopy; Third Alloying Element; Tomographic Atom-Probe

Domains: Physics [physics]; Condensed Matter [cond-mat]; Materials Science [cond-mat.mtrl-sci]

Rajashekhara Shabadi, Roland Taillard, Bertrand Radiguet, Jérémie de Baerdemaeker, Elke Leunis. Effect of Mn on the Nanoprecipitation in Binary Fe-Cu alloys. Solid State Phenomena, 2011, 172-174, pp.297-302. ⟨10.4028/www.scientific.net/SSP.172-174.297⟩. ⟨hal-02176554⟩