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Dynamic compaction of cold die Aluminum powders
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  • Journal title : Geomechanics and Engineering
  • Volume 10, Issue 1,  2016, pp.109-124
  • Publisher : Techno-Press
  • DOI : 10.12989/gae.2016.10.1.109
 Title & Authors
Dynamic compaction of cold die Aluminum powders
Babaei, Hashem; Mostofi, Tohid Mirzababaie; Alitavoli, Majid; Namazi, Nasir; Rahmanpoor, Ali;
 Abstract
In this paper, process of dynamic powder compaction is investigated experimentally using impact of drop hammer and die tube. A series of test is performed using aluminum powder with different grain size. The energy of compaction of powder is determined by measuring height of hammer and the results presented in term of compact density and rupture stress. This paper also presents a mathematical modeling using experimental data and neural network. The purpose of this modeling is to display how the variations of the significant parameters changes with the compact density and rupture stress. The closed-form obtained model shows very good agreement with experimental results and it provides a way of studying and understanding the mechanics of dynamic powder compaction process. In the considered energy level (from 733 to 3580 J), the relative density is varied from 63.89% to 87.41%, 63.93% to 91.52%, 64.15% to 95.11% for powder A, B and C respectively. Also, the maximum rupture stress are obtained for different types of powder and the results shown that the rupture stress increases with increasing energy level and grain size.
 Keywords
aluminum powder;compaction;drop hammer machine;impact loading;powder metallurgy;
 Language
English
 Cited by
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Modeling and prediction of fatigue life in composite materials by using singular value decomposition method, Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 2016, 146442071666087  crossref(new windwow)
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Gas mixture detonation method, a novel processing technique for metal powder compaction: Experimental investigation and empirical modeling, Powder Technology, 2017, 315, 171  crossref(new windwow)
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