Mechanical properties of lattice truss structures made of a selective laser melted superalloy
Selective laser melting is a free-form manufacturing process,where components are built up layer by layer using metal powder.Complicated geometries can be manufactured and the exact dimensional tolerances allow direct manufacturing with a minimum of post-processing.Many materials are available in powder form today,e.g.aluminium,titanium,stainless steels,tool steels and superalloys.The current work is performed on a nickel based superalloy,conforming in principle to Hastelloy X.Different lattice truss structures were manufactured with the selective laser melting process.In parallel,solid bars were produced with the same manufacturing process.Hollow rectangular tubes and composites of tubes with an interior of lattice truss structures were also manufactured.Hot rolled material of Hastelloy X was included for reference.Mechanical testing was performed in tension.Mechanical testing shows that the selective laser produced material is highly anisotropic and that the material has many advantages compared to the traditionally manufactured Hastelloy X alloy.Tests also show that fracture is promoted along certain planes in the lattice truss structure.
free form fabrication selective laser melting superalloys tensile testing lattice
H(a)kan Brodin Jonas Saarim(a)ki
Siemens Industrial Turbomachinery AB,612 31 Finsp(o)ng,Sweden;Link(o)ping University,Department of M Link(o)ping University,Department of Management and Engineering,Division of Engineering Materials,58
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）