Martensitic transformation of Ti50Ni30Cu20 alloy prepared by powder metallurgy

Martensitic transformation of Ti50Ni30Cu20 alloy prepared by powder metallurgy

► Martensitic transformation sequence in Ti50Ni30Cu20 prepared high – energy milling. ► Two transformations (B2-B19, B2-B19’) are evidenced after 10 hours of milling. ► B2-B19 transformation is not more observed after 20 hours of milling. ► A longer milling process promotes the formation of the seco...

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Veröffentlicht in:Journal of alloys and compounds 2011-03, Vol.509 (13), p.4495-4498
Hauptverfasser: Valeanu, M., Lucaci, M., Crisan, A.D., Sofronie, M., Leonat, L., Kuncser, V.
Format: Artikel
Sprache:eng
Schlagworte:
Alloy powders
Blends
Calorimetry
Cross-disciplinary physics: materials science
rheology
Differential scanning calorimetry
Diffraction
Diffraction patterns
Exact sciences and technology
Martensite transformation
Martensitic transformations
Materials science
Materials synthesis
materials processing
Mechanical alloying
Metals and alloys
Phase content
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Powder metallurgy
Shape memory
Ti–Ni–Cu shape memory alloy
X-ray diffraction
X-rays
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Zusammenfassung:► Martensitic transformation sequence in Ti50Ni30Cu20 prepared high – energy milling. ► Two transformations (B2-B19, B2-B19’) are evidenced after 10 hours of milling. ► B2-B19 transformation is not more observed after 20 hours of milling. ► A longer milling process promotes the formation of the secondary Ti 2(NiCu) phase. Phase transformation behavior of Ti50Ni30Cu20 shape memory alloys prepared by powder metallurgy is analyzed with respect to the duration of mechanical alloying. The processed blends were studied by differential scanning calorimetry and room temperature X-ray diffraction. The martensitic transformations evidenced by thermal scans are discussed in correlation with the relative phase content obtained from the refinement of the X-ray diffraction patterns.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.01.154