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

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 language	English
Article number	012036
Journal	IOP Conference Series: Materials Science and Engineering
Volume	156
Issue number	1
DOIs	https://doi.org/10.1088/1757-899X/156/1/012036
Publication status	Published - 8 Nov 2016

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)

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10.1088/1757-899X/156/1/012036

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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 journal › Article › peer-review

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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.",

author = "Kozlov, {E. V.} and Popova, {N. A.} and Nikonenko, {E. L.} and Kondratyuk, {A. A.} and Kuznetsov, {M. E.} and Klopotov, {A. A.}",

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AU - Kozlov, E. V.

AU - Popova, N. A.

AU - Nikonenko, E. L.

AU - Kondratyuk, A. A.

AU - Kuznetsov, M. E.

AU - Klopotov, A. A.

PY - 2016/11/8

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N2 - 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.

AB - 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.

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