The effect of Ti alloying on the mechanical properties and microstructure of a Zn-Al-Cu-Mg alloy


Turk A., Durman M., Kayali E.

ZEITSCHRIFT FUR METALLKUNDE, cilt.94, sa.8, ss.892-896, 2003 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 94 Sayı: 8
  • Basım Tarihi: 2003
  • Dergi Adı: ZEITSCHRIFT FUR METALLKUNDE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.892-896
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

The effect of Ti additions (0.01-0.20 wt.%) on the hardness, ultimate tensile strength, impact strength and creep properties of the gravity-cast Zn-Al-Cu-Mg alloy ZA-8 has been investigated. The Ti additions have no significant effect on the hardness. The ultimate tensile strength of the standard ZA-8 alloy has not been changed significantly with Ti additions up to 0.15 wt.% and then decreased with further increase in Ti content. The impact strength shows a maximum around 0.05-0.15 wt.% Ti. The lowest creep resistance is obtained at 0.01 wt.% Ti, and the highest value of creep resistance is reached for 0.20 wt.% Ti. Metallographic studies indicated that the addition of Ti has a profound effect on the microstructure. Also, Ti forms a complex-shaped intermetallic compound which was identified as TiZn15 by X-ray diffraction. It is suggested that the TiZn15 particles cause the increase in creep resistance and decrease in tensile strength.