Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy

Jie Ding; Shan Shi; Zhili Dong; Junpin Lin; Yang Ren; Xiaodong Wu; Hui Chang; Lian Zhou

doi:10.1080/02670836.2020.1795994

Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy

Jie Ding, Shan Shi, Zhili Dong, Junpin Lin, Yang Ren, Xiaodong Wu, Hui Chang, Lian Zhou

材料科学与工程学院

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摘要

Low cycle fatigue of lamellar TiAl with 8.5 at.-%Nb was studied with a total strain amplitude of 0.28% at three temperatures: room temperature, 750°C and 900°C. At room temperature, the material exhibited cyclic hardening and the fracture mode was mainly interlamellar. At 750°C and 900°C, the material showed cyclic softening and the fracture mode was translamellar. The lattice strain in γ phase was almost tensile and larger tensile lattice strain in γ phase seems detrimental. Besides, the opposite direction of {201}_γ and {100}_α2 lead to crack propagation along α₂/γ interfaces. B2/β_o phase always suffered compressive lattice strain in the tests. The destruction of lamellar microstructure was the reason for colony refinement at 750°C and 900°C.

源语言	英语
页（从-至）	1507-1515
页数	9
期刊	Materials Science and Technology (United Kingdom)
DOI	https://doi.org/10.1080/02670836.2020.1795994
出版状态	已出版 - 2020

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title = "Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy",

abstract = "Low cycle fatigue of lamellar TiAl with 8.5 at.-%Nb was studied with a total strain amplitude of 0.28% at three temperatures: room temperature, 750°C and 900°C. At room temperature, the material exhibited cyclic hardening and the fracture mode was mainly interlamellar. At 750°C and 900°C, the material showed cyclic softening and the fracture mode was translamellar. The lattice strain in γ phase was almost tensile and larger tensile lattice strain in γ phase seems detrimental. Besides, the opposite direction of {201}γ and {100}α2 lead to crack propagation along α2/γ interfaces. B2/βo phase always suffered compressive lattice strain in the tests. The destruction of lamellar microstructure was the reason for colony refinement at 750°C and 900°C.",

keywords = "TiAl alloys, cyclic stress–strain behaviour, fracture behaviour, low cycle fatigue, phase transformation, recrystallization",

author = "Jie Ding and Shan Shi and Zhili Dong and Junpin Lin and Yang Ren and Xiaodong Wu and Hui Chang and Lian Zhou",

note = "Publisher Copyright: {\textcopyright} 2020, {\textcopyright} 2020 Institute of Materials, Minerals and Mining.",

year = "2020",

doi = "10.1080/02670836.2020.1795994",

language = "英语",

pages = "1507--1515",

journal = "Materials Science and Technology (United Kingdom)",

issn = "0267-0836",

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TY - JOUR

T1 - Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy

AU - Ding, Jie

AU - Shi, Shan

AU - Dong, Zhili

AU - Lin, Junpin

AU - Ren, Yang

AU - Wu, Xiaodong

AU - Chang, Hui

AU - Zhou, Lian

PY - 2020

Y1 - 2020

N2 - Low cycle fatigue of lamellar TiAl with 8.5 at.-%Nb was studied with a total strain amplitude of 0.28% at three temperatures: room temperature, 750°C and 900°C. At room temperature, the material exhibited cyclic hardening and the fracture mode was mainly interlamellar. At 750°C and 900°C, the material showed cyclic softening and the fracture mode was translamellar. The lattice strain in γ phase was almost tensile and larger tensile lattice strain in γ phase seems detrimental. Besides, the opposite direction of {201}γ and {100}α2 lead to crack propagation along α2/γ interfaces. B2/βo phase always suffered compressive lattice strain in the tests. The destruction of lamellar microstructure was the reason for colony refinement at 750°C and 900°C.

AB - Low cycle fatigue of lamellar TiAl with 8.5 at.-%Nb was studied with a total strain amplitude of 0.28% at three temperatures: room temperature, 750°C and 900°C. At room temperature, the material exhibited cyclic hardening and the fracture mode was mainly interlamellar. At 750°C and 900°C, the material showed cyclic softening and the fracture mode was translamellar. The lattice strain in γ phase was almost tensile and larger tensile lattice strain in γ phase seems detrimental. Besides, the opposite direction of {201}γ and {100}α2 lead to crack propagation along α2/γ interfaces. B2/βo phase always suffered compressive lattice strain in the tests. The destruction of lamellar microstructure was the reason for colony refinement at 750°C and 900°C.

KW - TiAl alloys

KW - cyclic stress–strain behaviour

KW - fracture behaviour

KW - low cycle fatigue

KW - phase transformation

KW - recrystallization

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U2 - 10.1080/02670836.2020.1795994

DO - 10.1080/02670836.2020.1795994

M3 - 文章

AN - SCOPUS:85088462974

SN - 0267-0836

SP - 1507

EP - 1515

JO - Materials Science and Technology (United Kingdom)

JF - Materials Science and Technology (United Kingdom)

ER -

Cyclic deformation and lattice strain distribution of high Nb containing TiAl alloy

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