Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 686, Issue -, Pages 281-286Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.06.011
Keywords
Selective laser melting; Neutron diffraction; Aluminum alloy; Plastic deformation
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2015R1D1A1A01057208]
- National Research Foundation of Korea [10Z20130012494, 2012M2A2A6004262] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Micromechanical stress partitioning between Al and Si constituents in an AlSi10Mg alloy fabricated by selective laser melting was determined during uniaxial tensile loading. In situ neutron diffraction method was utilized for the measurements of the lattice strains from a set of Al and Si grains separately and the strain components were correlated to the stress evolution of each alloy constituent. The elastic strain of the Al matrix saturated at about 3800 mu epsilon while it continuously increases up to 9000 mu epsilon in the plastic deformation region of the Si particles. The stress partitioning was estimated as 260 MPa for the Al matrix and 680 MPa for the Si particles on fracture. Microstructure of the fracture surface shows a number of large voids and cracks propagated along the soft Al matrix. (C) 2016 Elsevier B.V. All rights reserved.
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