Fracture toughness at cryogenic temperatures of ultrafine-grained Ti-6Al-4V alloy processed by ECAP

Standard

Fracture toughness at cryogenic temperatures of ultrafine-grained Ti-6Al-4V alloy processed by ECAP. / Semenova, Irina P.; Modina, Julia M.; Polyakov, Alexander V.; Klevtsov, Gennady V.; Klevtsova, Nataly A.; Pigaleva, Irina N.; Valiev, Ruslan Z.; Langdon, Terence G.

In: Materials Science and Engineering A, Vol. 716, 14.02.2018, p. 260-267.

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

Author

Semenova, Irina P. ; Modina, Julia M. ; Polyakov, Alexander V. ; Klevtsov, Gennady V. ; Klevtsova, Nataly A. ; Pigaleva, Irina N. ; Valiev, Ruslan Z. ; Langdon, Terence G. / Fracture toughness at cryogenic temperatures of ultrafine-grained Ti-6Al-4V alloy processed by ECAP. In: Materials Science and Engineering A. 2018 ; Vol. 716. pp. 260-267.

BibTeX

@article{498df4f9e07248b08bf438908e295642,

title = "Fracture toughness at cryogenic temperatures of ultrafine-grained Ti-6Al-4V alloy processed by ECAP",

abstract = "This research is focused on a study of the relationship between mechanical behavior, microstructure and fracture toughness of a Ti-6Al-4V alloy in both coarse-grained (CG) and ultrafine-grained (UFG) conditions. The UFG state with a primary alpha-phase grain size, but with different orientations with respect to the testing direction, was produced by equal-channel angular pressing (ECAP) after thermo-mechanical treatment. Fracture toughness and mechanical testing were conducted at a temperature of − 196 °C. A duplex UFG structure formation in the Ti-6Al-4V alloy led to an enhancement of yield stress and a decrease in the fracture toughness at − 196 °С by comparison with the CG alloy. The lowest values of fracture toughness were observed in a sample in which there were elongated grains lying parallel to the loading direction during testing compared to the situation where the grains were perpendicular to this direction. The reasons for the reduction in fracture toughness in the UFG Ti alloy are discussed.",

keywords = "Cryogenic temperatures, Duplex ultrafine-grained structure, Fracture toughness, Titanium alloy, Uniform elongation, NANOCRYSTALLINE, STRENGTH, MECHANICAL-PROPERTIES, REFINEMENT, PARADOX, SEVERE PLASTIC-DEFORMATION, METALS, FATIGUE BEHAVIOR, TITANIUM-ALLOY, DUCTILITY",

author = "Semenova, {Irina P.} and Modina, {Julia M.} and Polyakov, {Alexander V.} and Klevtsov, {Gennady V.} and Klevtsova, {Nataly A.} and Pigaleva, {Irina N.} and Valiev, {Ruslan Z.} and Langdon, {Terence G.}",

year = "2018",

month = feb,

day = "14",

doi = "10.1016/j.msea.2017.12.106",

language = "English",

volume = "716",

pages = "260--267",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Fracture toughness at cryogenic temperatures of ultrafine-grained Ti-6Al-4V alloy processed by ECAP

AU - Semenova, Irina P.

AU - Modina, Julia M.

AU - Polyakov, Alexander V.

AU - Klevtsov, Gennady V.

AU - Klevtsova, Nataly A.

AU - Pigaleva, Irina N.

AU - Valiev, Ruslan Z.

AU - Langdon, Terence G.

PY - 2018/2/14

Y1 - 2018/2/14

N2 - This research is focused on a study of the relationship between mechanical behavior, microstructure and fracture toughness of a Ti-6Al-4V alloy in both coarse-grained (CG) and ultrafine-grained (UFG) conditions. The UFG state with a primary alpha-phase grain size, but with different orientations with respect to the testing direction, was produced by equal-channel angular pressing (ECAP) after thermo-mechanical treatment. Fracture toughness and mechanical testing were conducted at a temperature of − 196 °C. A duplex UFG structure formation in the Ti-6Al-4V alloy led to an enhancement of yield stress and a decrease in the fracture toughness at − 196 °С by comparison with the CG alloy. The lowest values of fracture toughness were observed in a sample in which there were elongated grains lying parallel to the loading direction during testing compared to the situation where the grains were perpendicular to this direction. The reasons for the reduction in fracture toughness in the UFG Ti alloy are discussed.

AB - This research is focused on a study of the relationship between mechanical behavior, microstructure and fracture toughness of a Ti-6Al-4V alloy in both coarse-grained (CG) and ultrafine-grained (UFG) conditions. The UFG state with a primary alpha-phase grain size, but with different orientations with respect to the testing direction, was produced by equal-channel angular pressing (ECAP) after thermo-mechanical treatment. Fracture toughness and mechanical testing were conducted at a temperature of − 196 °C. A duplex UFG structure formation in the Ti-6Al-4V alloy led to an enhancement of yield stress and a decrease in the fracture toughness at − 196 °С by comparison with the CG alloy. The lowest values of fracture toughness were observed in a sample in which there were elongated grains lying parallel to the loading direction during testing compared to the situation where the grains were perpendicular to this direction. The reasons for the reduction in fracture toughness in the UFG Ti alloy are discussed.

KW - Cryogenic temperatures

KW - Duplex ultrafine-grained structure

KW - Fracture toughness

KW - Titanium alloy

KW - Uniform elongation

KW - NANOCRYSTALLINE

KW - STRENGTH

KW - MECHANICAL-PROPERTIES

KW - REFINEMENT

KW - PARADOX

KW - SEVERE PLASTIC-DEFORMATION

KW - METALS

KW - FATIGUE BEHAVIOR

KW - TITANIUM-ALLOY

KW - DUCTILITY

UR - http://www.scopus.com/inward/record.url?scp=85041452103&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2017.12.106

DO - 10.1016/j.msea.2017.12.106

M3 - Article

AN - SCOPUS:85041452103

VL - 716

SP - 260

EP - 267

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -

ID: 35161081