Plastic deformation in advanced tungsten-based alloys for fusion applications studied by mechanical testing and TEM

Andrii Dubinko; Chao Yin; Dmitry Terentyev; Aleksandr Zinovev; Michael Rieth; Steffen Antusch; Monika Vilémová; Jiri Matejicek; Tao Zhang

doi:10.1016/j.ijrmhm.2020.105409

Plastic deformation in advanced tungsten-based alloys for fusion applications studied by mechanical testing and TEM

Andrii Dubinko, Chao Yin, Dmitry Terentyev, Aleksandr Zinovev, Michael Rieth, Steffen Antusch, Monika Vilémová, Jiri Matejicek, Tao Zhang

Research output › peer-review

Abstract

In this work, we have assessed mechanical properties of several tungsten grades considered as perspective materials for applications in plasma facing components in the nuclear fusion environment, where the neutron irradiation damage is expected to cause embrittlement. In particular, the work focuses on two aspects: bending tests to deduce the onset of ductile deformation and microstructural analysis of the reference and plastically deformed materials. The microstructure in the reference state and the one induced by plastic deformation at 600°C is studied by means of transmission electron microscopy (TEM). Six different types of tungsten-based materials were assessed: two commercial grades produced according to ITER specifications in Europe and China and four lab-scale grades utilizing different reinforcement options. The comparative assessment of tensile and bending strength was performed at 600°C accompanied with a detailed TEM analysis. The deformation-induced microstructure was characterized and compared for all studied grades in terms of the dislocation density, heterogeneity, observation of pile-ups and tangles specifically near grain boundaries and/or strengthening particles. The obtained data will serve as reference information required to assess the impact of neutron irradiation.

Original language	English
Article number	105409
Pages (from-to)	1-13
Number of pages	13
Journal	International Journal of Refractory Metals & Hard Materials
DOIs	https://doi.org/10.1016/j.ijrmhm.2020.105409
State	Published - 1 Feb 2021

Access to Document

10.1016/j.ijrmhm.2020.105409License: Unspecified

Cite this

@article{8f5e8ca52b5b4974bbd0fe8434c06160,

title = "Plastic deformation in advanced tungsten-based alloys for fusion applications studied by mechanical testing and TEM",

abstract = "In this work, we have assessed mechanical properties of several tungsten grades considered as perspective materials for applications in plasma facing components in the nuclear fusion environment, where the neutron irradiation damage is expected to cause embrittlement. In particular, the work focuses on two aspects: bending tests to deduce the onset of ductile deformation and microstructural analysis of the reference and plastically deformed materials. The microstructure in the reference state and the one induced by plastic deformation at 600°C is studied by means of transmission electron microscopy (TEM). Six different types of tungsten-based materials were assessed: two commercial grades produced according to ITER specifications in Europe and China and four lab-scale grades utilizing different reinforcement options. The comparative assessment of tensile and bending strength was performed at 600°C accompanied with a detailed TEM analysis. The deformation-induced microstructure was characterized and compared for all studied grades in terms of the dislocation density, heterogeneity, observation of pile-ups and tangles specifically near grain boundaries and/or strengthening particles. The obtained data will serve as reference information required to assess the impact of neutron irradiation.",

keywords = "TEM, Tungsten alloys, Mechanical testing, deformation, Plasticity, Dislocations",

author = "Andrii Dubinko and Chao Yin and Dmitry Terentyev and Aleksandr Zinovev and Michael Rieth and Steffen Antusch and Monika Vil{\'e}mov{\'a} and Jiri Matejicek and Tao Zhang",

note = "Score=10",

year = "2021",

month = feb,

day = "1",

doi = "10.1016/j.ijrmhm.2020.105409",

language = "English",

pages = "1--13",

journal = "International Journal of Refractory Metals & Hard Materials",

issn = "0263-4368",

publisher = "Elsevier",

}

TY - JOUR

T1 - Plastic deformation in advanced tungsten-based alloys for fusion applications studied by mechanical testing and TEM

AU - Dubinko, Andrii

AU - Yin, Chao

AU - Terentyev, Dmitry

AU - Zinovev, Aleksandr

AU - Rieth, Michael

AU - Antusch, Steffen

AU - Vilémová, Monika

AU - Matejicek, Jiri

AU - Zhang, Tao

N1 - Score=10

PY - 2021/2/1

Y1 - 2021/2/1

N2 - In this work, we have assessed mechanical properties of several tungsten grades considered as perspective materials for applications in plasma facing components in the nuclear fusion environment, where the neutron irradiation damage is expected to cause embrittlement. In particular, the work focuses on two aspects: bending tests to deduce the onset of ductile deformation and microstructural analysis of the reference and plastically deformed materials. The microstructure in the reference state and the one induced by plastic deformation at 600°C is studied by means of transmission electron microscopy (TEM). Six different types of tungsten-based materials were assessed: two commercial grades produced according to ITER specifications in Europe and China and four lab-scale grades utilizing different reinforcement options. The comparative assessment of tensile and bending strength was performed at 600°C accompanied with a detailed TEM analysis. The deformation-induced microstructure was characterized and compared for all studied grades in terms of the dislocation density, heterogeneity, observation of pile-ups and tangles specifically near grain boundaries and/or strengthening particles. The obtained data will serve as reference information required to assess the impact of neutron irradiation.

AB - In this work, we have assessed mechanical properties of several tungsten grades considered as perspective materials for applications in plasma facing components in the nuclear fusion environment, where the neutron irradiation damage is expected to cause embrittlement. In particular, the work focuses on two aspects: bending tests to deduce the onset of ductile deformation and microstructural analysis of the reference and plastically deformed materials. The microstructure in the reference state and the one induced by plastic deformation at 600°C is studied by means of transmission electron microscopy (TEM). Six different types of tungsten-based materials were assessed: two commercial grades produced according to ITER specifications in Europe and China and four lab-scale grades utilizing different reinforcement options. The comparative assessment of tensile and bending strength was performed at 600°C accompanied with a detailed TEM analysis. The deformation-induced microstructure was characterized and compared for all studied grades in terms of the dislocation density, heterogeneity, observation of pile-ups and tangles specifically near grain boundaries and/or strengthening particles. The obtained data will serve as reference information required to assess the impact of neutron irradiation.

KW - TEM

KW - Tungsten alloys

KW - Mechanical testing

KW - deformation

KW - Plasticity

KW - Dislocations

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/overview/40732625

U2 - 10.1016/j.ijrmhm.2020.105409

DO - 10.1016/j.ijrmhm.2020.105409

M3 - Article

SN - 0263-4368

SP - 1

EP - 13

JO - International Journal of Refractory Metals & Hard Materials

JF - International Journal of Refractory Metals & Hard Materials

M1 - 105409

ER -