Processing of bulk Al7075 alloy by spark plasma sintering

0476974 - ÚFP 2018 RIV GB eng C - Conference Paper (international conference)
Málek, P. - Molnárová, O. - Cinert, Jakub - Lukáč, František - Chráska, Tomáš
Processing of bulk Al7075 alloy by spark plasma sintering.
IOP Conference Series: Materials Science and Engineering. Vol. 179. Bristol: Institute of Physics Publishing ( IOP ), 2017 - (Dzugan, J.), č. článku 012050. IOP Conference Series. ISSN 1757-8981.
[International Conference Recent Trends in Structural Materials (COMAT)/4./. Pilsen (CZ), 09.11.2016-11.11.2016]
R&D Projects: GA ČR(CZ) GA15-15609S
Institutional support: RVO:61389021
Keywords : AL7075 alloy * Spark Plasme Sintering * Intermetallic precipitates * ultrafine-grained materials
OECD category: Materials engineering
http://iopscience.iop.org/article/10.1088/1757-899X/179/1/012050

The main advantages of powder metallurgy processing route are the possibility to produce near-netshape compacts and to minimize the finish machining and material loss. The main problem in particle consolidation process is to suppress porosity, to remove oxide layers, and to retain the microstructure of powder materials. Spark plasma sintering (SPS) combines concurrent uniaxial pressure and direct heating by a pulsed DC current. Sintering occurs at relatively low temperatures for a short time and does not influence significantly the microstructure in the interiors of original powder particles. The efficiency of SPS in producing compacts with low porosity might be dependent on the distribution of particle size in original powder material. The gas atomized Al7075 powder was sieved to several charges and then sintered by SPS. Microstructure of sintered compacts was studied by light and scanning electron microscopy. The phase composition was investigated using X-ray diffraction. The mechanical behaviour was tested by bending tests.
Permanent Link: http://hdl.handle.net/11104/0273448