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Title: Mechanical properties of hot pressed CoCrMo alloy compacts for biomedical applications
Authors: Henriques, B.
Bagheri, A.
Gasik, M.
Souza, J.C.M.
Carvalho, O.
Silva, F.S.
Nascimento, Rubens Maribondo do
Keywords: CoCrMo alloy;Hot pressing;Mechanical properties;Biomedical applications
Issue Date: 2015
Publisher: Elsevier
Citation: HENRIQUES, B. ; BAGHERI, A. ; GASIK, M. ; SOUZA, J.C.M. ; CARVALHO, O. ; SILVA, F.S. ; Nascimento, R.M. . Mechanical properties of hot pressed CoCrMo alloy compacts for biomedical applications. Materials & Design, v. 83, p. 829-834, 2015. Disponível em: Acesso em:
Portuguese Abstract: This study aimed at investigating the influence of the processing conditions on the mechanical properties of hot pressed compacts of a CoCrMo biomedical alloy. Several hot pressed CoCrMo compacts were processed in vacuum (102 mbar), at a pressure of 60 MPa with different temperatures (900 C, 1000 C and 1100 C) and different times (10 min, 30 min and 60 min). Compacts were examined by SEM/EDS. The transverse rupture strength, Young’s Moduli and hardness were determined. The fracture surface of compacts were also examined. The compacts hot pressed at 900 C exhibited lower TRS than those processed at 1000 C and 1100 C, which showed similar strength values, regardless the sintering time. The 900 C compacts showed also lower YM and higher porosity. Lower hardness values were registered for 900 C compacts while 1000 C compacts exhibited the highest values. The fracture surface analyses revealed fragile fracture for 900 C compacts (10 min and 30 min) and 1000 C (10 min). The remaining compacts exhibited ductile fracture. A full characterization of the mechanical properties of hot pressed CoCrMo compacts has been made and the selection of the processing parameters according to the desired mechanical properties is now possible.
ISSN: 0264-1275
Appears in Collections:CT - DEMAT - Artigos publicados em periódicos

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