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

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

1 Scopus citations

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/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.

Original language	English
Pages (from-to)	1507-1515
Number of pages	9
Journal	Materials Science and Technology
DOIs	https://doi.org/10.1080/02670836.2020.1795994
State	Published - 2020
Externally published	Yes

Keywords

TiAl alloys
cyclic stress–strain behaviour
fracture behaviour
low cycle fatigue
phase transformation
recrystallization

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10.1080/02670836.2020.1795994

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@article{df03d3b5fb224537ae9b5332707e6464,

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",

issn = "0267-0836",

publisher = "SAGE Publications Inc.",

}

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

UR - https://www.scopus.com/pages/publications/85088462974

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

JF - Materials Science and Technology

ER -

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

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Keywords

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