Microstructure and mechanical properties of Al-12Si produced by selective laser melting

被引：13
作者：
Fefelov, A. S. [1 ]
Merkushev, A. G. [1 ]
Chikova, O. A. [1 ]
机构：
[1] Ural Fed Univ, FSAEI, HE, 19 Mira St, Ekaterinburg 620002, Russia
来源：
INNOVATIONS AND PROSPECTS OF DEVELOPMENT OF MINING MACHINERY AND ELECTRICAL ENGINEERING | 2017年 / 87卷
关键词：
SINTERING/MELTING SLS/SLM; AL; ALLOY; STRENGTH;
D O I：
10.1088/1755-1315/87/9/092011
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Al-12Si specimens are produced by selective laser melting (SLM) from gas atomized powders. Installation for the production of powder is original. All specimens were prepared using the EOSINT M 280 device. A fine cellular structure is observed with residual free Si along the cellular boundaries. Room temperature tensile tests reveal remarkable mechanical behavior: the samples show yield and tensile strengths of about 102 MPa and 425 MPa, respectively, along with fracture strain of 12%. The study of crack surface morphology was shown by the example of a sample. Except the spherical pores, the interface of the molten pool also appears on the fracture surface, which indicates a mixture of fragile and ductile fracture. Additionally, the agglomerated silicon group appears also on the fracture surface.
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页数：5
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