Influence of Al content on martensitic transformation behavior in Zr 50Cu 50-xAl x

F. Q. Meng, K. Tsuchiya, F. X. Yin, S. Ii, Yoshihiko Yokoyama

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Influence of Al content on martensitic transformation temperature in ZrCu phase was investigated by differential scanning calorimetry for a series of Zr 50Cu 50-xAl x alloys. The crystallographic structure of the martensite was predominantly a monoclinic Cm, which is a superstructure of B19′. Microstructural observations revealed that a higher Al content above 6 mol% led to a pronounced formation of Zr 2Cu and τ 5 phases forming complex eutectic microstructures. The electron probe microanalysis indicated that the Al atoms in ZrCu phase substitute the Cu atoms up to 6 mol% and the excess Al atoms exist mainly in the τ 5 phase. The increasing Al content from 0 to 6 mol% induced a decrease in the martensitic transformation start temperature, M s, from 446 K to 311 K, and in the reverse martensitic transformation start temperature, A s, from 537 K to 468 K. But M s remained almost constant when the Al content is over 6 mol%. Thus, the substitution of the Cu atoms by the Al atoms in ZrCu phase led to the decrease in M s and A s.

Original languageEnglish
Pages (from-to)136-140
Number of pages5
JournalJournal of Alloys and Compounds
Volume522
DOIs
Publication statusPublished - 2012 May 5

Keywords

  • Calorimetry
  • Glasses
  • Martensitic structure
  • Martensitic transformation
  • Metallic
  • Thermal stability

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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