Structure and transformation behaviour of rapidly solidified Ni-Al-Hf alloys

Dmitri V. Louzguine, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Rapidly solidified Ni-Al-Hf alloys of ternary eutectic compositions were studied by X-ray diffractometry, transmission electron microscopy and differential scanning calorimetry. Ni66Hf20Al14 amorphous alloy with relatively high Hf/Al ratio showed high tensile strength of 1600 MPa and high thermal stability against crystallization. The formation of a nanoscale metastable intermetallic compound having a body-centered cubic lattice with a lattice parameter of a = 1.22 nm was observed in the alloys with higher Al than Hf content. The transformation of an amorphous+metastable cubic mixture to AlNi3 produces AlNi3 of the same composition as the AlNi3 phase formed on rapid solidification. Pm3̄m AlNi3 phase can dissolve up to 11 at.% Hf.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalJournal of Alloys and Compounds
Volume340
Issue number1-2
DOIs
Publication statusPublished - 2002 Jun 26

Keywords

  • Alloys
  • Amorphous materials
  • Calorimetry
  • Rapid soldification
  • TEM

ASJC Scopus subject areas

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

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