Helium-bubble-enhanced disordering of intermetallic phase under irradiation

Cheng Sun; Mukesh N. Bachhav; Yongqiang Wang; Meimei Li; Stuart A. Maloy

doi:10.1016/j.matchar.2021.111094

Helium-bubble-enhanced disordering of intermetallic phase under irradiation

Cheng Sun
, Mukesh N. Bachhav
, Yongqiang Wang
, Meimei Li
, Stuart A. Maloy

Materials and Fuels Complex

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

8 Scopus citations

Abstract

Understanding and controlling phase transformations in metals and alloys under irradiation is vital to the design of irradiation-tolerant materials. The L1₂-ordered intermetallic phase in nickel-based superalloys provides superior high-temperature mechanical properties and corrosion resistance. Here, we studied the order-disorder transformation kinetics of an L1₂-structured gamma-prime phase in nickel-based superalloy Rene N4 under krypton ion irradiation and the effect of pre-implanted helium gas bubbles on the kinetics of phase transformation. The presence of pre-implanted helium gas bubbles significantly enhances the order-disorder transformation of L1₂-structured gamma-prime phase under irradiation at 300 °C. The evolution of pre-implanted helium gas bubbles under irradiation implies that helium gas bubbles could effectively trap irradiation-induced vacancies and impede the reordering process of anti-site defects in gamma-prime phase.

Original language	English
Article number	111094
Journal	Materials Characterization
Volume	176
DOIs	https://doi.org/10.1016/j.matchar.2021.111094
State	Published - Jun 2021

Keywords

Helium gas bubbles
Intermetallics
Irradiation
L1 structure
Phase stability

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10.1016/j.matchar.2021.111094

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title = "Helium-bubble-enhanced disordering of intermetallic phase under irradiation",

abstract = "Understanding and controlling phase transformations in metals and alloys under irradiation is vital to the design of irradiation-tolerant materials. The L12-ordered intermetallic phase in nickel-based superalloys provides superior high-temperature mechanical properties and corrosion resistance. Here, we studied the order-disorder transformation kinetics of an L12-structured gamma-prime phase in nickel-based superalloy Rene N4 under krypton ion irradiation and the effect of pre-implanted helium gas bubbles on the kinetics of phase transformation. The presence of pre-implanted helium gas bubbles significantly enhances the order-disorder transformation of L12-structured gamma-prime phase under irradiation at 300 °C. The evolution of pre-implanted helium gas bubbles under irradiation implies that helium gas bubbles could effectively trap irradiation-induced vacancies and impede the reordering process of anti-site defects in gamma-prime phase.",

keywords = "Helium gas bubbles, Intermetallics, Irradiation, L1 structure, Phase stability",

author = "Cheng Sun and Bachhav, \{Mukesh N.\} and Yongqiang Wang and Meimei Li and Maloy, \{Stuart A.\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",

year = "2021",

month = jun,

doi = "10.1016/j.matchar.2021.111094",

language = "English",

volume = "176",

journal = "Materials Characterization",

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}

TY - JOUR

T1 - Helium-bubble-enhanced disordering of intermetallic phase under irradiation

AU - Sun, Cheng

AU - Bachhav, Mukesh N.

AU - Wang, Yongqiang

AU - Li, Meimei

AU - Maloy, Stuart A.

PY - 2021/6

Y1 - 2021/6

N2 - Understanding and controlling phase transformations in metals and alloys under irradiation is vital to the design of irradiation-tolerant materials. The L12-ordered intermetallic phase in nickel-based superalloys provides superior high-temperature mechanical properties and corrosion resistance. Here, we studied the order-disorder transformation kinetics of an L12-structured gamma-prime phase in nickel-based superalloy Rene N4 under krypton ion irradiation and the effect of pre-implanted helium gas bubbles on the kinetics of phase transformation. The presence of pre-implanted helium gas bubbles significantly enhances the order-disorder transformation of L12-structured gamma-prime phase under irradiation at 300 °C. The evolution of pre-implanted helium gas bubbles under irradiation implies that helium gas bubbles could effectively trap irradiation-induced vacancies and impede the reordering process of anti-site defects in gamma-prime phase.

AB - Understanding and controlling phase transformations in metals and alloys under irradiation is vital to the design of irradiation-tolerant materials. The L12-ordered intermetallic phase in nickel-based superalloys provides superior high-temperature mechanical properties and corrosion resistance. Here, we studied the order-disorder transformation kinetics of an L12-structured gamma-prime phase in nickel-based superalloy Rene N4 under krypton ion irradiation and the effect of pre-implanted helium gas bubbles on the kinetics of phase transformation. The presence of pre-implanted helium gas bubbles significantly enhances the order-disorder transformation of L12-structured gamma-prime phase under irradiation at 300 °C. The evolution of pre-implanted helium gas bubbles under irradiation implies that helium gas bubbles could effectively trap irradiation-induced vacancies and impede the reordering process of anti-site defects in gamma-prime phase.

KW - Helium gas bubbles

KW - Intermetallics

KW - Irradiation

KW - L1 structure

KW - Phase stability

UR - https://www.scopus.com/pages/publications/85104055966

U2 - 10.1016/j.matchar.2021.111094

DO - 10.1016/j.matchar.2021.111094

M3 - Article

AN - SCOPUS:85104055966

SN - 1044-5803

VL - 176

JO - Materials Characterization

JF - Materials Characterization

M1 - 111094

ER -

Helium-bubble-enhanced disordering of intermetallic phase under irradiation

Abstract

Keywords

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