Fracture behaviour of selective laser sintered Rapidsteel 2.0 under static and dynamic loading

D Uzunsoy, Isaac Chang, Paul Bowen

Research output: Contribution to journalArticle

12 Citations (Scopus)


Selective laser sintered Rapidsteel parts were sintered and infiltrated with Cu - 10 at.-%Sn, in two different atmospheres (e.g. 30%H-2 - 70%N-2 and vacuum with a partial pressure of 200 mbar of Ar). The processing atmosphere had a significant effect on the mechanical properties of the infiltrated parts. The part sintered/infiltrated in a 30%H-2 - 70%N-2 atmosphere, exhibited a tensile strength of 780 MPa and a ductility of 4.45%. However, the tensile strength was reduced moderately to 650 MPa while the ductility was increased significantly to 11.7% by changing the sintering/infiltration atmosphere from 30%H-2-70%N-2 to vacuum + Ar. Furthermore, the parts processed in a vacuum + Ar atmosphere exhibited a better fracture resistance than parts processed in 30%H-2-70%N-2. The improvement in ductility and fracture resistance for parts processed in vacuum+Ar atmosphere was primarily due to the elimination of nitrides. For both cases, ductile fracture occurred in stainless steel particulate and striation was found in the bronze infiltrant.
Original languageEnglish
Pages (from-to)897-901
Number of pages5
JournalMaterials Science and Technology
Issue number7
Publication statusPublished - 1 Jul 2003


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