Ordering transformations in Ni75Mo15Mn10 alloy

U. D. Kulkarni, S. Hata, M. Mitsuhara, K. Ikeda

Research output: Contribution to journalArticlepeer-review


Effect of partial substitution of Mo in Ni3Mo by Mn on its ordering behaviour is studied here using Transmission Electron Microscopy (TEM). The change in alloy composition does not change the nature of the short range ordered (SRO) state, which shows intensity maxima at {1 1/2 0} and equivalent positions. However, prolonged aging at 973 K leads to transformation of the Ni75Mo15Mn10 alloy, studied here, almost entirely into the ordered D022 phase unlike in the case of the binary Ni-Mo alloy. Curved antiphase boundaries (APBs), with wetting of the interdomain D022 regions by the disordered phase, characterize the microstructure of the aged alloy. A small volume fraction of a sigma-like topologically close packed (TCP) phase that appears in the as quenched alloy seems to remain unaffected by ageing.

Original languageEnglish
Pages (from-to)819-822
Number of pages4
JournalTransactions of the Indian Institute of Metals
Issue number5
Publication statusPublished - Oct 2010

All Science Journal Classification (ASJC) codes

  • Metals and Alloys


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