A comparative study on hot dynamic compaction and quasi-static hot pressing of Al7075/SiCnp nanocomposite

被引：41
作者：
Atrian, A. [1 ]
Majzoobi, G. H. [1 ]
Enayati, M. H. [2 ]
Bakhtiari, H. [1 ]
机构：
[1] Bu Ali Sina Univ, Dept Mech Engn, Hamadan 65174, Iran
[2] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
来源：
ADVANCED POWDER TECHNOLOGY | 2015年 / 26卷 / 01期
关键词：
SiC nano particle; Metal matrix composite; Powder metallurgy; Dynamic compaction; Hot pressing; MECHANICAL-PROPERTIES; MICROSTRUCTURAL CHARACTERIZATION; CONSOLIDATION; FRACTION; BEHAVIOR;
D O I：
10.1016/j.apt.2014.08.007
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Quasi-static and hot dynamic compactions of Al7075/SiC nanocomposite powder are studied in this work. Mechanically milled micron-sized Al7075 with different amounts of SiC nano particles (SiCnp), 0 vol%, 5 vol%, and 10 vol%, are used to fabricate the samples. Dynamic and quasi-static hot compaction is conducted at strain rates of 10(3) s(-1) and 8 x 10(-3) s(-1), respectively. The hot compaction conducted at the process temperature of 698 K produces nanocomposite samples with relative densities up to 98%. The microstructural and mechanical behaviors of samples such as micro hardness and stress-strain curves under quasi-static and dynamic loadings are also investigated. The results show improvement in micro hardness of the material. The quasi-static and dynamic tests are carried out using Instron testing machine and split Hopkinson pressure bar (SHPB), respectively. The improvement is believed to be due to strengthening mechanisms such as Orowan and enhanced dislocation density induced by thermal mismatch phenomenon and not by grain refinement described by the Hall-Petch effect. The results from quasi-static compressive tests reveal higher strength for quasi-static hot pressed samples than those produced under dynamic compaction. However, the dynamic compressive tests using SHPB indicate similar compressive strength for both quasi-statically and dynamically compacted samples. (C) 2014 The Society of Powder Technology Japan. Published by Elsevier B. V. and The Society of Powder Technology Japan. All rights reserved.
引用
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页码：73 / 82
页数：10
相关论文
共 35 条
[1]   Synthesis, Tensile Testing, and Microstructural Characterization of Nanometric SiC Particulate-Reinforced Al 7075 Matrix Composites [J].
Ahmed, A. ;
Neely, A. J. ;
Shankar, K. ;
Nolan, P. ;
Moricca, S. ;
Eddowes, T. .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2010, 41A (06) :1582-1591
[2]   Wear Behavior of Nanostructured Al and Al-B4C Nanocomposites Produced by Mechanical Milling and Hot Extrusion [J].
Alizadeh, A. ;
Taheri-Nassaj, E. .
TRIBOLOGY LETTERS, 2011, 44 (01) :59-66
[3]   Mechanical and microstructural characterization of Al7075/SiC nanocomposites fabricated by dynamic compaction [J].
Atrian, A. ;
Majzoobi, G. H. ;
Enayati, M. H. ;
Bakhtiari, H. .
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2014, 21 (03) :295-303
[4]   Development of a High-Velocity Compaction process for polymer powders [J].
Azhdar, B ;
Stenberg, B ;
Kari, L .
POLYMER TESTING, 2005, 24 (07) :909-919
[5]   Microstructure and abrasive wear behaviour of B4C particle reinforced 2014 Al matrix composites [J].
Canakci, A. .
JOURNAL OF MATERIALS SCIENCE, 2011, 46 (08) :2805-2813
[6]   Shock-compression response of magnetic Fe3O4 nanoparticles [J].
Dai, C. ;
Thadhani, N. N. .
ACTA MATERIALIA, 2011, 59 (02) :785-796
[7]   Fabrication and mechanical properties of nano-/micro-sized Al2O3/SiC composites [J].
Dong, Y. L. ;
Xu, F. M. ;
Shi, X. L. ;
Zhang, C. ;
Zhang, Z. J. ;
Yang, J. M. ;
Tan, Y. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 504 (1-2) :49-54
[8]   THERMAL MISMATCH DISLOCATIONS PRODUCED BY LARGE PARTICLES IN A STRAIN-HARDENING MATRIX [J].
DUNAND, D ;
MORTENSEN, A .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 135 :179-184
[9]   Microstructure and interface studies of AI/SiCP composites produced by dynamic compaction [J].
Eskandari, H ;
Ghasemi, HM ;
Emamy, M .
EXPLOSION, SHOCK WAVE AND HYPERVELOCITY PHENOMENA IN MATERIALS, 2004, 465-466 :213-218
[10]   The effect of Mg add on morphology and mechanical properties of Al-xMg/10Al2O3 nanocomposite produced by mechanical alloying [J].
Fathy, A. ;
Wagih, A. ;
Abd El-Hamid, M. ;
Hassan, Ahmed A. .
ADVANCED POWDER TECHNOLOGY, 2014, 25 (04) :1345-1350
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