Effects of build orientation and element partitioning on microstructure and mechanical properties of biomedical ${Ti-6Al-4V}$ alloy produced by laser sintering
PBN-AR
Instytucja
Wydział Inżynierii Metali i Informatyki Przemysłowej (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Journal of the Mechanical Behavior of Biomedical Materials (35pkt w roku publikacji)
ISSN
1751-6161
EISSN
1878-0180
Wydawca
Elsevier Science BV
DOI
Rok publikacji
2017
Numer zeszytu
Strony od-do
1--9
Numer tomu
71
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.64
Autorzy
Pozostali autorzy
+ 8
Słowa kluczowe
EN
mechanical properties
heat treatment
laser sintering
Ti alloys
structure characterization
element partitioning
Streszczenia
Język
EN
Treść
Direct Metal Laser Sintering (DMLS) technology was used to produce tensile and flexural samples based on the Ti-6Al-4V biomedical composition. Tensile samples were produced in three different orientations in order to investigate the effect of building direction on the mechanical behavior. On the other hand, flexural samples were submitted to thermal treatments to simulate the firing cycle commonly used to veneer metallic devices with ceramics in dental applications. Roughness and hardness measurements as well as tensile and flexural mechanical tests were performed to study the mechanical response of the alloy while X-ray diffraction (XRD), electron microscopy (SEM, TEM, STEM) techniques and microanalysis (EDX) were used to investigate sample microstructure. Results evidenced a difference in the mechanical response of tensile samples built in orthogonal directions. In terms of microstructure, samples not submitted to the firing cycle show a single phase acicular α’ (hcp) structure typical of metal parts subject to high cooling rates. After the firing cycle, samples show a reduction of hardness and strength due to the formation of laths of the β (bcc) phase at the boundaries of the primary formed α’ plates as well as to lattice parameters variation of the hcp phase. Element partitioning during the firing cycle gives rise to high concentration of V atoms (up to 20 wt%) at the plate boundaries where the β phase preferentially forms.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:105306
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