Influence of Ni on stability of martensitic transformation in Zr 50Cu50-xNix

Fanqiang Meng, Koichi Tsuchiya, Seiichiro Ii, Yoshihiko Yokoyama

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10 Citations (Scopus)

Abstract

Influence of Ni content on the stability of martensitic transformation and microstructure evolution was investigated in Zr50Cu 50-xNix (x = 0, 5, 10, 15). Microstructural observations revealed that the both B19′ and Cm martensites were present in all the alloys investigated. The thermal behaviors results indicated that the initial Ms increased from 433 K to 699 K with an increase of Ni content from 5 to 15 mol.%. For x = 5, the forward and reverse martensitic transformation disappeared after thermal cycling. For x = 10 and 15, both transformation still remained even after 10 cycles. Two-step transformation behaviors were observed on both forward and reverse transformation in x = 15 alloy. Ni addition decreased the transformation hysteresis. Microstructural observations revealed the Ni addition up to 10 mol.% suppressed the decomposition of ZrCu into Zr 2Cu and τ5 phases during 10 thermal cycling treatments. These results indicated that the addition of Ni over 10 mol.% stabilized the martensitic transformation during thermal cycling.

Original languageEnglish
Pages (from-to)S136-S140
JournalJournal of Alloys and Compounds
Volume577
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2013 Nov 15

Keywords

  • Martensitic transformation
  • Microstructure
  • Shape memory effect
  • Thermal stability
  • Zr-Cu-Ni

ASJC Scopus subject areas

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

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