High-temperature strength of Ni-doped IrAl with the B2 type ordered crystal structure

A. Chiba; T. Ono; X. G. Li; S. Takahashi

doi:10.1016/S0966-9795(97)00051-4

High-temperature strength of Ni-doped IrAl with the B2 type ordered crystal structure

A. Chiba, T. Ono, X. G. Li, S. Takahashi

New Industry Creation Hatchery Center (NICHe)

Iwate University

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Constant-velocity and constant-load compression tests have been conducted to examine the mechanical behavior of polycrystalline Ir_1-xNi_xAl intermetallic compounds with x = 0 to 1·0 at elevated temperatures. Ductility of Ir_1-xNi_xAl is improved with increasing x, while the strength decreases with increasing x in the intermediate temperature range. The specific strength of Ir_1-xNi_xAl is almost independent of x at temperatures higher than approximately 1473 K. Secondary creep of IrAl and Ir_0·2Ni_0·8Al (i.e. modified NiAl) exhibits class II and class I behavior, respectively. Creep strength of Ir_1-xNi_xAl is about a magnitude of four higher than that of single-phase and multi-phase NiAl at a given applied stress. The Ir_1-xNi_xAl intermetallic compound is superior to binary IrAl as a high-temperature structural material from the viewpoint of the specific strength, ductility and resistance to oxidation, especially at temperatures higher than 1473 K. Published by Elsevier Science Limited. All rights reserved.

Original language	English
Pages (from-to)	35-42
Number of pages	8
Journal	Intermetallics
Volume	6
Issue number	1
DOIs	https://doi.org/10.1016/S0966-9795(97)00051-4
Publication status	Published - 1998 Feb

Keywords

A. intermetallics
B. creep
G. energy system
Mechanical properties at high temperature
Nickel aluminides based on NiAl

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10.1016/S0966-9795(97)00051-4

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title = "High-temperature strength of Ni-doped IrAl with the B2 type ordered crystal structure",

abstract = "Constant-velocity and constant-load compression tests have been conducted to examine the mechanical behavior of polycrystalline Ir1-xNixAl intermetallic compounds with x = 0 to 1·0 at elevated temperatures. Ductility of Ir1-xNixAl is improved with increasing x, while the strength decreases with increasing x in the intermediate temperature range. The specific strength of Ir1-xNixAl is almost independent of x at temperatures higher than approximately 1473 K. Secondary creep of IrAl and Ir0·2Ni0·8Al (i.e. modified NiAl) exhibits class II and class I behavior, respectively. Creep strength of Ir1-xNixAl is about a magnitude of four higher than that of single-phase and multi-phase NiAl at a given applied stress. The Ir1-xNixAl intermetallic compound is superior to binary IrAl as a high-temperature structural material from the viewpoint of the specific strength, ductility and resistance to oxidation, especially at temperatures higher than 1473 K. Published by Elsevier Science Limited. All rights reserved.",

keywords = "A. intermetallics, B. creep, G. energy system, Mechanical properties at high temperature, Nickel aluminides based on NiAl",

author = "A. Chiba and T. Ono and Li, {X. G.} and S. Takahashi",

note = "Funding Information: The authors would like to thank Mr M. Sato of Iwate University for help with samplep reparation. This work was supportedb y a Grant-in-Aid for Scientific Researchf rom the Ministry of Education, Science,S ports and Culture, Japan.",

year = "1998",

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doi = "10.1016/S0966-9795(97)00051-4",

language = "English",

volume = "6",

pages = "35--42",

journal = "Intermetallics",

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T1 - High-temperature strength of Ni-doped IrAl with the B2 type ordered crystal structure

AU - Chiba, A.

AU - Ono, T.

AU - Li, X. G.

AU - Takahashi, S.

N1 - Funding Information: The authors would like to thank Mr M. Sato of Iwate University for help with samplep reparation. This work was supportedb y a Grant-in-Aid for Scientific Researchf rom the Ministry of Education, Science,S ports and Culture, Japan.

PY - 1998/2

Y1 - 1998/2

N2 - Constant-velocity and constant-load compression tests have been conducted to examine the mechanical behavior of polycrystalline Ir1-xNixAl intermetallic compounds with x = 0 to 1·0 at elevated temperatures. Ductility of Ir1-xNixAl is improved with increasing x, while the strength decreases with increasing x in the intermediate temperature range. The specific strength of Ir1-xNixAl is almost independent of x at temperatures higher than approximately 1473 K. Secondary creep of IrAl and Ir0·2Ni0·8Al (i.e. modified NiAl) exhibits class II and class I behavior, respectively. Creep strength of Ir1-xNixAl is about a magnitude of four higher than that of single-phase and multi-phase NiAl at a given applied stress. The Ir1-xNixAl intermetallic compound is superior to binary IrAl as a high-temperature structural material from the viewpoint of the specific strength, ductility and resistance to oxidation, especially at temperatures higher than 1473 K. Published by Elsevier Science Limited. All rights reserved.

AB - Constant-velocity and constant-load compression tests have been conducted to examine the mechanical behavior of polycrystalline Ir1-xNixAl intermetallic compounds with x = 0 to 1·0 at elevated temperatures. Ductility of Ir1-xNixAl is improved with increasing x, while the strength decreases with increasing x in the intermediate temperature range. The specific strength of Ir1-xNixAl is almost independent of x at temperatures higher than approximately 1473 K. Secondary creep of IrAl and Ir0·2Ni0·8Al (i.e. modified NiAl) exhibits class II and class I behavior, respectively. Creep strength of Ir1-xNixAl is about a magnitude of four higher than that of single-phase and multi-phase NiAl at a given applied stress. The Ir1-xNixAl intermetallic compound is superior to binary IrAl as a high-temperature structural material from the viewpoint of the specific strength, ductility and resistance to oxidation, especially at temperatures higher than 1473 K. Published by Elsevier Science Limited. All rights reserved.

KW - A. intermetallics

KW - B. creep

KW - G. energy system

KW - Mechanical properties at high temperature

KW - Nickel aluminides based on NiAl

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High-temperature strength of Ni-doped IrAl with the B2 type ordered crystal structure

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Keywords

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