Polynomial vs. mechanism-based response surface analysis of the thermomechanical treatment of Al-Sn alloys
The effects of strain, annealing time and temperature during the processing of an Al-Sn-based triboalloy were studied experimentally and interpreted by response surface analysis. A second-degree polynomial in strain-time-temperature space was compared to a simple formulation based on the Johnson-Mehl-Avrami-Kolmogorov analysis for recrystallisation, taking into account concurrent recovery, and the Burke & Turnbull analysis for grain growth, using the rule of mixtures to obtain a weighted response for a microstructure consisting of recovered, recrystallised and second-phase grains. The polynomial approach provides interesting information on the role of severe plastic deformation in the optimisation of the alloy. The mechanism-based approach yields higher precision with less fitting parameters. Variants of the latter also provide insight into the relative importance of the physical phenomena involved in the processing of an alloy which has rarely been studied from the viewpoint of physical metallurgy.
Response surface Recovery Recrystallisation Grain growth Two-phase alloy
R.Schouwenaars H.A.Cortéz V.H.Jacobo A.Ortiz
Departmento de Ingeniería Mecánica, DIMEI, Universidad Nacional Autónoma de México, Circuito Exterior de Ciudad Universitaria, Coyoacán, D.F.C.P.04510, México.
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）