کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
237492 | 465710 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A plastic-yield compaction model for nanostructured Al6063 alloy and Al6063/Al2O3 nanocomposite powder A plastic-yield compaction model for nanostructured Al6063 alloy and Al6063/Al2O3 nanocomposite powder](/preview/png/237492.png)
A modified plastic yield function is proposed to predict the consolidation behavior of nanostructured metal powders and metal-matrix nanocomposite powders under uniaxial compaction. The validity of the model is verified for nanocrystalline Al6063 (~ 100 nm) alloy reinforced without and with 0.8 vol.% Al2O3 nanoparticles (~ 25 nm). The plastic deformation propensity of these powders is analyzed by linear compaction equations. The yield stress of the powder compacts is shown to be influenced by the nano-scale grains and the reinforcement nanoparticles.
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► A new model is proposed to study the compressibility of nanostructured/nanocomposite powders.
► The model prediction is in good agreement with experiments, although it overestimates the density of coarse-grained powders at high pressures.
► The yield stress of Al6063 compacts with nanostructured features (reinforced with and without nanoparticles) is reported.
Journal: Powder Technology - Volume 211, Issues 2–3, 10–25 August 2011, Pages 215–220