Journal of Materials Science

, Volume 30, Issue 6, pp 1577–1583 | Cite as

A study on martensitic transformation in Ti50−x/2Ni50−x/2Cux alloys with X≤10 at%

  • Y. C. Lo
  • S. K. Wu


The effect of Cu additions on the martensitic transformation sequence and temperature in Ti50−x/2Ni50−x/2Cuxalloys with x: 1–10 at% are investigated by ER, DSC, X-ray and IF measurements. Experimental results show that the transformation sequence of Ti50−x/2Ni50−x/2Cux alloys with x: 1–4 at% proceeding as two-stage B2→R→B19′ transformation on cooling and Ti50−x/2Ni50−x/2Cux alloys with x=5, 10 at% have no martensitic transformation. The addition of Cu in Ti50−x/2Ni50−x/2Cux alloys assists the formation of R-phase, a behaviour which is quite different from that in Ti50Ni50−xCux alloys. Both the Ms and TR temperatures decrease rapidly with increasing Cu addition in Ti50−x/2Ni50−x/2Cux alloys with x: 1–4 at%. It is proposed that the Cu+Ni effects on the Ms temperature in Ti50−x/2Ni50−x/2Cux alloys is similar as Cu +Ni effects in Ti50Ni50−xCux alloys and as Ni effects in as-quenched Ni-rich TiNi alloys.


Polymer Material Processing Martensitic Transformation TiNi TiNi Alloy 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • Y. C. Lo
    • 1
  • S. K. Wu
    • 1
  1. 1.Institute of Materials Science and EngineeringNational Taiwan UniversityTaipeiTaiwan, Republic of China

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