Microstructure and mechanical properties of Al-12Si produced by selective laser melting: Effect of heat treatment
Journal article, 2014
Al-12Si specimens are produced by selective laser melting (SLM) from gas atomized powders. An extremely fine cellular structure is observed with residual free Si along the cellular boundaries. Room temperature tensile tests reveal a remarkable mechanical behavior: the samples show yield and tensile strengths of about 260. MPa and 380. MPa, respectively, along with fracture strain of ~3%. The effect of annealing on microstructure and related tensile properties is examined and the results demonstrate that the mechanical behavior of the Al-12Si SLM samples can be tuned within a wide range of strength and ductility through proper annealing treatment.
Tensile behavior
Selective laser melting
Microstructure
Aluminum alloys
Author
K.G. Prashanth
Leibniz Association
S. Scudino
Leibniz Association
H.J. Klauß
Leibniz Association
Kumar Babu Surreddi
Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering
L. Löber
Leibniz Association
Z. Wang
Leibniz Association
A.K. Chaubey
Institute of Minerals and Materials Technology India
Leibniz Association
U. Kühn
Leibniz Association
Juergen Eckert
Leibniz Association
Technische Universität Dresden
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
0921-5093 (ISSN)
Vol. 590 153-160Subject Categories (SSIF 2011)
Materials Engineering
DOI
10.1016/j.msea.2013.10.023