Solidification process and mechanical behavior of the Nb/Nb 5Si 3 two phase alloys in the Nb-Ti-Si system

Nobuaki Sekido; Yoshisato Kimura; Seiji Miura; Yoshinao Mishima

doi:10.2320/matertrans.45.3264

Solidification process and mechanical behavior of the Nb/Nb ₅Si ₃ two phase alloys in the Nb-Ti-Si system

Nobuaki Sekido, Yoshisato Kimura, Seiji Miura, Yoshinao Mishima

ENG - Materials Science

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

31 Citations (Scopus)

Abstract

Design of two-phase alloys consisting of niobium solid solution (A2) and α-Nb ₅Si ₃ (D8 _l) phases in the Nb-Ti-Si ternary system is pursued for ultra-high temperature structural applications. Compositional and annealing conditions are determined for the formation of A2/D8 _l lamellar microstructure via eutectoid decomposition of Nb ₃Si (tP32) phase in the Nb-Si binary and Nb-Ti-Si ternary system. Addition of titanium is found to result in increased room temperature toughness, but decreased high temperature strength. Enhancement of mechanical properties is achieved by applying the directional solidification technique. Mechanical properties of the alloys are discussed from microstructural point of view.

Original language	English
Pages (from-to)	3264-3271
Number of pages	8
Journal	Materials Transactions
Volume	45
Issue number	12
DOIs	https://doi.org/10.2320/matertrans.45.3264
Publication status	Published - 2004 Dec

Keywords

Eutectoid reaction
Fracture toughness
Phase equilibria
Solidification

Access to Document

10.2320/matertrans.45.3264

Cite this

@article{b2b742fd3d314fb09674b07a451c8d26,

title = "Solidification process and mechanical behavior of the Nb/Nb 5Si 3 two phase alloys in the Nb-Ti-Si system",

abstract = "Design of two-phase alloys consisting of niobium solid solution (A2) and α-Nb 5Si 3 (D8 l) phases in the Nb-Ti-Si ternary system is pursued for ultra-high temperature structural applications. Compositional and annealing conditions are determined for the formation of A2/D8 l lamellar microstructure via eutectoid decomposition of Nb 3Si (tP32) phase in the Nb-Si binary and Nb-Ti-Si ternary system. Addition of titanium is found to result in increased room temperature toughness, but decreased high temperature strength. Enhancement of mechanical properties is achieved by applying the directional solidification technique. Mechanical properties of the alloys are discussed from microstructural point of view.",

keywords = "Eutectoid reaction, Fracture toughness, Phase equilibria, Solidification",

author = "Nobuaki Sekido and Yoshisato Kimura and Seiji Miura and Yoshinao Mishima",

year = "2004",

month = dec,

doi = "10.2320/matertrans.45.3264",

language = "English",

volume = "45",

pages = "3264--3271",

journal = "Materials Transactions",

issn = "1345-9678",

publisher = "Japan Institute of Metals (JIM)",

number = "12",

}

TY - JOUR

T1 - Solidification process and mechanical behavior of the Nb/Nb 5Si 3 two phase alloys in the Nb-Ti-Si system

AU - Sekido, Nobuaki

AU - Kimura, Yoshisato

AU - Miura, Seiji

AU - Mishima, Yoshinao

PY - 2004/12

Y1 - 2004/12

N2 - Design of two-phase alloys consisting of niobium solid solution (A2) and α-Nb 5Si 3 (D8 l) phases in the Nb-Ti-Si ternary system is pursued for ultra-high temperature structural applications. Compositional and annealing conditions are determined for the formation of A2/D8 l lamellar microstructure via eutectoid decomposition of Nb 3Si (tP32) phase in the Nb-Si binary and Nb-Ti-Si ternary system. Addition of titanium is found to result in increased room temperature toughness, but decreased high temperature strength. Enhancement of mechanical properties is achieved by applying the directional solidification technique. Mechanical properties of the alloys are discussed from microstructural point of view.

AB - Design of two-phase alloys consisting of niobium solid solution (A2) and α-Nb 5Si 3 (D8 l) phases in the Nb-Ti-Si ternary system is pursued for ultra-high temperature structural applications. Compositional and annealing conditions are determined for the formation of A2/D8 l lamellar microstructure via eutectoid decomposition of Nb 3Si (tP32) phase in the Nb-Si binary and Nb-Ti-Si ternary system. Addition of titanium is found to result in increased room temperature toughness, but decreased high temperature strength. Enhancement of mechanical properties is achieved by applying the directional solidification technique. Mechanical properties of the alloys are discussed from microstructural point of view.

KW - Eutectoid reaction

KW - Fracture toughness

KW - Phase equilibria

KW - Solidification

UR - http://www.scopus.com/inward/record.url?scp=13844297831&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=13844297831&partnerID=8YFLogxK

U2 - 10.2320/matertrans.45.3264

DO - 10.2320/matertrans.45.3264

M3 - Article

AN - SCOPUS:13844297831

SN - 1345-9678

VL - 45

SP - 3264

EP - 3271

JO - Materials Transactions

JF - Materials Transactions

IS - 12

ER -

Solidification process and mechanical behavior of the Nb/Nb ₅Si ₃ two phase alloys in the Nb-Ti-Si system

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this