The structure of heat-resisting alloy modified by thermal treatment and alloyed by rhenium and lanthanum

E. V. Kozlov, N. A. Popova, E. L. Nikonenko, A. A. Kondratyuk, M. E. Kuznetsov, A. A. Klopotov

Research output: Contribution to journalArticle

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Abstract

The paper presents the scanning and transmission electron microscope investigations of the structure, phase composition, and morphology of heat-resisting alloy modified by thermal treatment and additionally alloyed by rhenium and lanthanum. Rhenium alloy is obtained by the directional crystallization technique. The structural investigations are carried out for three alloy states, i.e. 1) original (after the directional crystallization); 2) 1150°C annealing during 1 h and 1100°C annealing during 480 h; 3) 1150°C annealing during 1 h and 1100°C annealing during 1430 h. It is shown that fcc-based γ- and γ'-phases are primary in all states of the alloy. γ'-phase has L12 structure, while γ-phase is a disordered phase. Rhenium and lanthanum are phase-forming elements. Investigations show that high-temperature annealing modifies the structural and phase conditions of the heat-resisting alloy.

Original languageEnglish
Article number012036
JournalIOP Conference Series: Materials Science and Engineering
Volume156
Issue number1
DOIs
Publication statusPublished - 8 Nov 2016

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Rhenium
Lanthanum
Heat resistance
Heat treatment
Annealing
Crystallization
Rhenium alloys
Phase structure
Phase composition
Electron microscopes
Scanning

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

The structure of heat-resisting alloy modified by thermal treatment and alloyed by rhenium and lanthanum. / Kozlov, E. V.; Popova, N. A.; Nikonenko, E. L.; Kondratyuk, A. A.; Kuznetsov, M. E.; Klopotov, A. A.

In: IOP Conference Series: Materials Science and Engineering, Vol. 156, No. 1, 012036, 08.11.2016.

Research output: Contribution to journalArticle

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AU - Kuznetsov, M. E.

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