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Microstructure and mechanical properties of Al-12Si produced by selective laser melting: Effect of heat treatment

K.G. Prashanth ; S. Scudino ; H.J. Klauß ; Kumar Babu Surreddi (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; L. Löber ; Z. Wang ; A.K. Chaubey ; U. Kühn ; J. Eckert
Materials Science and Engineering A (0921-5093). Vol. 590 (2014), p. 153-160.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Aluminum alloys , Microstructure , Selective laser melting , Tensile behavior



Denna post skapades 2014-02-10. Senast ändrad 2014-09-02.
CPL Pubid: 193601

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Ämnesområden

Materialteknik

Chalmers infrastruktur