Fatigue crack growth in niobium aluminide intermetallics

Jeff Dipasquale; David Gahutu; Doug Konitzer; Wole Soboyejo

Fatigue crack growth in niobium aluminide intermetallics

Jeff Dipasquale
, David Gahutu
, Doug Konitzer
, Wole Soboyejo

President

SUNY Polytechnic Institute

Ohio State University

Research output: Contribution to journal › Conference article › peer-review

10 Scopus citations

Abstract

The results of a recent study of the fatigue crack growth in a new class of niobium aluminide (Nb₃Al) intermetallics alloyed with various levels of Ti are presented. The alloys studied have the following nominal compositions (note that all compositions are quoted in atomic %): Nb-15Al-10Ti(10Ti alloy), Nb-15Al-25Ti(25Ti alloy), Nb-15Al-40Ti(40Ti alloy) and Nb-12.5Al-41Ti-1.5Mo(41Ti alloy). Fatigue crack growth behavior was studied at room-temperature in all the alloys. Fracture mechanisms were determined by inspection of SEM images of fracture surfaces. Faceted cleavage fracture modes were apparent on the 10Ti and 25Ti alloys. The 40Ti and 41Ti alloys exhibited clear evidence of ductile dimpled fracture. The ductile 40Ti and 41Ti alloys are shown to have comparable or better fatigue crack growth resistance than mill annealed Ti-6Al-4V. The effects of crack orientation (relative to elongated grains) on the fatigue crack growth behavior of the 41Ti alloy are also discussed.

Original language	English
Pages (from-to)	1347-1352
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	364
Issue number	2
State	Published - 1995
Event	Proceedings of the 1994 MRS Fall Meeting - Boston, MA, USA Duration: Nov 28 1994 → Nov 30 1994

Cite this

@article{9a2a1437518642799049388fca63b414,

title = "Fatigue crack growth in niobium aluminide intermetallics",

abstract = "The results of a recent study of the fatigue crack growth in a new class of niobium aluminide (Nb3Al) intermetallics alloyed with various levels of Ti are presented. The alloys studied have the following nominal compositions (note that all compositions are quoted in atomic \%): Nb-15Al-10Ti(10Ti alloy), Nb-15Al-25Ti(25Ti alloy), Nb-15Al-40Ti(40Ti alloy) and Nb-12.5Al-41Ti-1.5Mo(41Ti alloy). Fatigue crack growth behavior was studied at room-temperature in all the alloys. Fracture mechanisms were determined by inspection of SEM images of fracture surfaces. Faceted cleavage fracture modes were apparent on the 10Ti and 25Ti alloys. The 40Ti and 41Ti alloys exhibited clear evidence of ductile dimpled fracture. The ductile 40Ti and 41Ti alloys are shown to have comparable or better fatigue crack growth resistance than mill annealed Ti-6Al-4V. The effects of crack orientation (relative to elongated grains) on the fatigue crack growth behavior of the 41Ti alloy are also discussed.",

author = "Jeff Dipasquale and David Gahutu and Doug Konitzer and Wole Soboyejo",

year = "1995",

language = "English",

volume = "364",

pages = "1347--1352",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

number = "2",

note = "Proceedings of the 1994 MRS Fall Meeting ; Conference date: 28-11-1994 Through 30-11-1994",

}

TY - JOUR

T1 - Fatigue crack growth in niobium aluminide intermetallics

AU - Dipasquale, Jeff

AU - Gahutu, David

AU - Konitzer, Doug

AU - Soboyejo, Wole

PY - 1995

Y1 - 1995

N2 - The results of a recent study of the fatigue crack growth in a new class of niobium aluminide (Nb3Al) intermetallics alloyed with various levels of Ti are presented. The alloys studied have the following nominal compositions (note that all compositions are quoted in atomic %): Nb-15Al-10Ti(10Ti alloy), Nb-15Al-25Ti(25Ti alloy), Nb-15Al-40Ti(40Ti alloy) and Nb-12.5Al-41Ti-1.5Mo(41Ti alloy). Fatigue crack growth behavior was studied at room-temperature in all the alloys. Fracture mechanisms were determined by inspection of SEM images of fracture surfaces. Faceted cleavage fracture modes were apparent on the 10Ti and 25Ti alloys. The 40Ti and 41Ti alloys exhibited clear evidence of ductile dimpled fracture. The ductile 40Ti and 41Ti alloys are shown to have comparable or better fatigue crack growth resistance than mill annealed Ti-6Al-4V. The effects of crack orientation (relative to elongated grains) on the fatigue crack growth behavior of the 41Ti alloy are also discussed.

AB - The results of a recent study of the fatigue crack growth in a new class of niobium aluminide (Nb3Al) intermetallics alloyed with various levels of Ti are presented. The alloys studied have the following nominal compositions (note that all compositions are quoted in atomic %): Nb-15Al-10Ti(10Ti alloy), Nb-15Al-25Ti(25Ti alloy), Nb-15Al-40Ti(40Ti alloy) and Nb-12.5Al-41Ti-1.5Mo(41Ti alloy). Fatigue crack growth behavior was studied at room-temperature in all the alloys. Fracture mechanisms were determined by inspection of SEM images of fracture surfaces. Faceted cleavage fracture modes were apparent on the 10Ti and 25Ti alloys. The 40Ti and 41Ti alloys exhibited clear evidence of ductile dimpled fracture. The ductile 40Ti and 41Ti alloys are shown to have comparable or better fatigue crack growth resistance than mill annealed Ti-6Al-4V. The effects of crack orientation (relative to elongated grains) on the fatigue crack growth behavior of the 41Ti alloy are also discussed.

UR - https://www.scopus.com/pages/publications/0029218211

M3 - Conference article

SN - 0272-9172

VL - 364

SP - 1347

EP - 1352

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

IS - 2

T2 - Proceedings of the 1994 MRS Fall Meeting

Y2 - 28 November 1994 through 30 November 1994

ER -

Fatigue crack growth in niobium aluminide intermetallics

Abstract

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