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

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Abstract

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 T R 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.

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Taiwan University, 106, Taipei, Taiwan, Republic of China

    Y. C. Lo & S. K. Wu

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  1. Y. C. Lo
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  2. S. K. Wu
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Lo, Y.C., Wu, S.K. A study on martensitic transformation in Ti50−x/2Ni50−x/2Cux alloys with X≤10 at%. Journal of Materials Science 30, 1577–1583 (1995). https://doi.org/10.1007/BF00375268

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  • DOI: https://doi.org/10.1007/BF00375268

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