Evolution of helium bubbles induced by stress concentration in He-irradiated aluminium

Hao Chen; Wenqing Liu; Yangming Cheng; Jianchao Peng; Xue Liang; Lijuan Hu; Gang Wang

doi:10.1016/j.matlet.2019.03.091

Evolution of helium bubbles induced by stress concentration in He-irradiated aluminium

Hao Chen
, Wenqing Liu
, Yangming Cheng
, Jianchao Peng
, Xue Liang
, Lijuan Hu
, Gang Wang^*

^*Corresponding author for this work

Shanghai University
CAS - Shanghai Institute of Microsystem and Information Technology

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

10 Scopus citations

Abstract

By employing an in-situ tension experiment in a transmission electron microscope, a stress concentration is demonstrated as a significant contributor to evolution of helium bubbles in a non-uniform stress field. In the stress concentration, a bubble growth occurs through bubble migration and coalescence driven by stress gradients as well as a dislocation slip-induced vacancy absorption upon straining. A bubble-shape evolution occurs after a coalescence of bubbles with similar size. As the bubbles grow to critical sizes, gradual elongation and disappearance of bubbles are found with further straining.

Original language	English
Pages (from-to)	11-14
Number of pages	4
Journal	Materials Letters
Volume	247
DOIs	https://doi.org/10.1016/j.matlet.2019.03.091
State	Published - 15 Jul 2019
Externally published	Yes

Keywords

Helium bubbles
In-situ TEM tension
Stress concentration
Stress gradient-driven coalescence

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10.1016/j.matlet.2019.03.091

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@article{c2b21a835a034d2998186561eba40b6a,

title = "Evolution of helium bubbles induced by stress concentration in He-irradiated aluminium",

abstract = "By employing an in-situ tension experiment in a transmission electron microscope, a stress concentration is demonstrated as a significant contributor to evolution of helium bubbles in a non-uniform stress field. In the stress concentration, a bubble growth occurs through bubble migration and coalescence driven by stress gradients as well as a dislocation slip-induced vacancy absorption upon straining. A bubble-shape evolution occurs after a coalescence of bubbles with similar size. As the bubbles grow to critical sizes, gradual elongation and disappearance of bubbles are found with further straining.",

keywords = "Helium bubbles, In-situ TEM tension, Stress concentration, Stress gradient-driven coalescence",

author = "Hao Chen and Wenqing Liu and Yangming Cheng and Jianchao Peng and Xue Liang and Lijuan Hu and Gang Wang",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.matlet.2019.03.091",

language = "英语",

volume = "247",

pages = "11--14",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Evolution of helium bubbles induced by stress concentration in He-irradiated aluminium

AU - Chen, Hao

AU - Liu, Wenqing

AU - Cheng, Yangming

AU - Peng, Jianchao

AU - Liang, Xue

AU - Hu, Lijuan

AU - Wang, Gang

PY - 2019/7/15

Y1 - 2019/7/15

N2 - By employing an in-situ tension experiment in a transmission electron microscope, a stress concentration is demonstrated as a significant contributor to evolution of helium bubbles in a non-uniform stress field. In the stress concentration, a bubble growth occurs through bubble migration and coalescence driven by stress gradients as well as a dislocation slip-induced vacancy absorption upon straining. A bubble-shape evolution occurs after a coalescence of bubbles with similar size. As the bubbles grow to critical sizes, gradual elongation and disappearance of bubbles are found with further straining.

AB - By employing an in-situ tension experiment in a transmission electron microscope, a stress concentration is demonstrated as a significant contributor to evolution of helium bubbles in a non-uniform stress field. In the stress concentration, a bubble growth occurs through bubble migration and coalescence driven by stress gradients as well as a dislocation slip-induced vacancy absorption upon straining. A bubble-shape evolution occurs after a coalescence of bubbles with similar size. As the bubbles grow to critical sizes, gradual elongation and disappearance of bubbles are found with further straining.

KW - Helium bubbles

KW - In-situ TEM tension

KW - Stress concentration

KW - Stress gradient-driven coalescence

UR - https://www.scopus.com/pages/publications/85063161002

U2 - 10.1016/j.matlet.2019.03.091

DO - 10.1016/j.matlet.2019.03.091

M3 - 文章

AN - SCOPUS:85063161002

SN - 0167-577X

VL - 247

SP - 11

EP - 14

JO - Materials Letters

JF - Materials Letters

ER -

Evolution of helium bubbles induced by stress concentration in He-irradiated aluminium

Abstract

Keywords

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