Damping Capacity Damping Capacity Investigation of some Copper Investigation of some Copper based alloys through Thermal based alloys through Thermal
Analysis Analysis
PhD studentPhD student Nicanor Cimpoesu Nicanor Cimpoesu
FacultFacultyy S.I.M. Ia S.I.M. Iașiși
ContentsContents Damping capacityDamping capacity Materials with big internal friction and applicationsMaterials with big internal friction and applications Investigated alloys characterizationInvestigated alloys characterization
- spectrometer- spectrometer
- D.I.L.- D.I.L.
- D.S.C.- D.S.C.
- optical micrographs- optical micrographs
- S.E.M. and E.D.X.- S.E.M. and E.D.X.
- D.M.A- D.M.A ConclusionsConclusions
Damping capacity Damping capacity
Materials with damping capacityMaterials with damping capacity
Rubber membrane with 0.8 value of internal friction Rubber membrane with 0.8 value of internal friction Steel sample with internal friction 0.005 1 Hz frequency.Steel sample with internal friction 0.005 1 Hz frequency.
Adhesive with low viscosity Adhesive with low viscosity with with 6 the value of internal friction at –20 6 the value of internal friction at –20 °C temperature.°C temperature.
A quartz with 0.2 and a shape memory alloy TiNiCu with 0.12A quartz with 0.2 and a shape memory alloy TiNiCu with 0.12
Shape memory alloys applications as Shape memory alloys applications as
materials with damping capacity materials with damping capacity
Analiza chimica a AMF urilorAnaliza chimica a AMF urilor
Dilatometry tests Dilatometry tests
Differential Scanning CalorimetryDifferential Scanning Calorimetry (DSC) of studied alloys (DSC) of studied alloys
Optical micrographs Optical micrographs
Scanning electron micrographs (SEM)Scanning electron micrographs (SEM)
EDAX study of investigated alloys EDAX study of investigated alloys
Studiu EDX a aliajelor investigateStudiu EDX a aliajelor investigatePart. IIIPart. III
Damping capacity investigation with Damping capacity investigation with a DMA (dynamic mechanical a DMA (dynamic mechanical
analyzer) equipment analyzer) equipment
Frecarea interna a unui aliaj cu Frecarea interna a unui aliaj cu memoria formei tip CuZnAl memoria formei tip CuZnAl
Applications of S.M.A.-s with big internal Applications of S.M.A.-s with big internal friction and shape memory effect friction and shape memory effect
ConclusionsConclusions Two alloys from copper-zinc system was obtain in Two alloys from copper-zinc system was obtain in
classical conditions, and after investigation with a classical conditions, and after investigation with a differential dilatometer reveals nice shape memory differential dilatometer reveals nice shape memory effect.effect.
Using combined equipments we can analyze and Using combined equipments we can analyze and conclude on thermal behavior at heating and cooling of a conclude on thermal behavior at heating and cooling of a shape memory alloy like transformation points, damping shape memory alloy like transformation points, damping capacity and elastic modulus variation with temperature. capacity and elastic modulus variation with temperature.
Small value of internal friction at room temperature of a Small value of internal friction at room temperature of a shape memory alloy can’t be used in energy dissipation shape memory alloy can’t be used in energy dissipation applications. Contrarily the same Cu-Zn-Al SMA applications. Contrarily the same Cu-Zn-Al SMA presents a nice peak of internal friction around presents a nice peak of internal friction around temperature of 90 ºC, in transformation points range, of temperature of 90 ºC, in transformation points range, of 0,116 which can be use for practical applications.0,116 which can be use for practical applications.
Paper was sustain by PCE-IDEI grant 616, project 83/01.10.2007Paper was sustain by PCE-IDEI grant 616, project 83/01.10.2007
ThanksThanks::
- Prof. Dr. Ing. Hopulele IonProf. Dr. Ing. Hopulele Ion
- Conf. Dr. Ing. Stanciu Sergiu Conf. Dr. Ing. Stanciu Sergiu
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