Modelling the high temperature flow behaviour of sintered Cu–28Zn pre-alloyed powder compacts considering the effect of strain |
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Authors: | Rozita Rouzegar Herbert Danninger |
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Affiliation: | 1. Department of Materials Engineering, Sahand University of Technology, Tabriz, Iran;2. Institute of Chemical Technologies and Analytics, Vienna University of Technology Wien/Vienna, Austria |
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Abstract: | In the field of the deformation process modelling, constitutive equations tend to be utilised as a calculation basis for the estimation of the materials’ flow responses. This holds also for powder metallurgy products. Hence, in this study, the flow behaviour of sintered Cu–28Zn pre-alloyed powder compacts was investigated by a collection of isothermal hot compression tests in the temperature range of 550–850°C at strain rates of 0.001, 0.01, 0.1 and 0.5?s?1 up to the true strain of 0.6. For the sintered part with a predefined porosity of 9.4%, the impacts of the temperature and strain rate on the deformation behaviour were shown by the Zener–Hollomon parameter in an exponent-type equation. As a result, a model was developed to predict the high temperature flow behaviour of the Cu–28Zn pre-alloyed powder compact. The results indicated that the strain-dependent constitutive equations are in good conformity with the experimental results. |
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Keywords: | Sintered brass pre-alloyed powder constitutive equation high temperature flow behaviour Arrhenius type equation |
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