High Temperature Strength of Ir/Ir2Y Two Phase Alloys in the Ir-Pt-Y System

Abstract:

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Possibilities of heat resistant alloys based on a C15 Laves phase and an FCC phase have been examined in the Ir-Pt-Y ternary system. Although the Ir solid solution phase (A1) and the Ir2Y phase (C15) are not in equilibrium in the Ir-Y binary system, this equilibrium is attained by small Pt additions to the binary system. High temperature compressive strength of an A1/C15 monovariant eutectic alloy was found to be much lower than that of Ir-15Nb, an Ir based γ/γ' alloy. Low strength of the present alloys is attributed to the absence of effective strengthening mechanisms that operate in the A1 phase; for Y is hardly dissolved within the A1 phase, by which solution hardening and precipitation hardening are not available.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

424-427

DOI:

10.4028/www.scientific.net/MSF.654-656.424

Citation:

N. Sekido and Y. Yamabe-Mitarai, "High Temperature Strength of Ir/Ir2Y Two Phase Alloys in the Ir-Pt-Y System ", Materials Science Forum, Vols. 654-656, pp. 424-427, 2010

Online since:

June 2010

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$35.00

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