Investigating creep behavior of Ni–Cr–W alloy pressurized tube at 950 °C by using in-situ creep testing system

Yang Zhong; Kuan Che Lan; Hoon Lee; Bomou Zhou; Yong Wang; D. K.L. Tsang; James F. Stubbins

doi:10.1016/j.net.2019.12.024

Investigating creep behavior of Ni–Cr–W alloy pressurized tube at 950 °C by using in-situ creep testing system

Yang Zhong, Kuan Che Lan, Hoon Lee, Bomou Zhou, Yong Wang, D. K.L. Tsang, James F. Stubbins

Nuclear, Plasma, and Radiological Engineering

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

Abstract

The creep behavior of Ni–Cr–W alloy at 950 °C has been investigated by a novel creep testing system which is capable of in-situ measurement of strain. Tubular specimens were pressurized with argon gas for effective stresses up to 32 MPa. Experimental results show that the thermal fatigue reduces the creep life of the tubular specimens and with the introduction of thermal cycling fatigue the primary stage disappears and the creep rate higher than the pure thermal creep (without thermal fatigue). Also the creep behavior of Ni–Cr–W alloy doesn't consist in the secondary stage. A new creep equation has been derived and implemented into finite element method. The results from the finite element analyses are in good agreement with the creep experiment.

Original language	English (US)
Pages (from-to)	1481-1485
Number of pages	5
Journal	Nuclear Engineering and Technology
Volume	52
Issue number	7
DOIs	https://doi.org/10.1016/j.net.2019.12.024
State	Published - Jul 2020

Keywords

Finite element analysis
Ni-Cr-W alloy
Thermal creep

ASJC Scopus subject areas

Nuclear Energy and Engineering

Online availability

10.1016/j.net.2019.12.024

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title = "Investigating creep behavior of Ni–Cr–W alloy pressurized tube at 950 °C by using in-situ creep testing system",

abstract = "The creep behavior of Ni–Cr–W alloy at 950 °C has been investigated by a novel creep testing system which is capable of in-situ measurement of strain. Tubular specimens were pressurized with argon gas for effective stresses up to 32 MPa. Experimental results show that the thermal fatigue reduces the creep life of the tubular specimens and with the introduction of thermal cycling fatigue the primary stage disappears and the creep rate higher than the pure thermal creep (without thermal fatigue). Also the creep behavior of Ni–Cr–W alloy doesn't consist in the secondary stage. A new creep equation has been derived and implemented into finite element method. The results from the finite element analyses are in good agreement with the creep experiment.",

keywords = "Finite element analysis, Ni-Cr-W alloy, Thermal creep",

author = "Yang Zhong and Lan, {Kuan Che} and Hoon Lee and Bomou Zhou and Yong Wang and Tsang, {D. K.L.} and Stubbins, {James F.}",

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

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doi = "10.1016/j.net.2019.12.024",

language = "English (US)",

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T1 - Investigating creep behavior of Ni–Cr–W alloy pressurized tube at 950 °C by using in-situ creep testing system

AU - Zhong, Yang

AU - Lan, Kuan Che

AU - Lee, Hoon

AU - Zhou, Bomou

AU - Wang, Yong

AU - Tsang, D. K.L.

AU - Stubbins, James F.

PY - 2020/7

Y1 - 2020/7

N2 - The creep behavior of Ni–Cr–W alloy at 950 °C has been investigated by a novel creep testing system which is capable of in-situ measurement of strain. Tubular specimens were pressurized with argon gas for effective stresses up to 32 MPa. Experimental results show that the thermal fatigue reduces the creep life of the tubular specimens and with the introduction of thermal cycling fatigue the primary stage disappears and the creep rate higher than the pure thermal creep (without thermal fatigue). Also the creep behavior of Ni–Cr–W alloy doesn't consist in the secondary stage. A new creep equation has been derived and implemented into finite element method. The results from the finite element analyses are in good agreement with the creep experiment.

AB - The creep behavior of Ni–Cr–W alloy at 950 °C has been investigated by a novel creep testing system which is capable of in-situ measurement of strain. Tubular specimens were pressurized with argon gas for effective stresses up to 32 MPa. Experimental results show that the thermal fatigue reduces the creep life of the tubular specimens and with the introduction of thermal cycling fatigue the primary stage disappears and the creep rate higher than the pure thermal creep (without thermal fatigue). Also the creep behavior of Ni–Cr–W alloy doesn't consist in the secondary stage. A new creep equation has been derived and implemented into finite element method. The results from the finite element analyses are in good agreement with the creep experiment.

KW - Finite element analysis

KW - Ni-Cr-W alloy

KW - Thermal creep

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Investigating creep behavior of Ni–Cr–W alloy pressurized tube at 950 °C by using in-situ creep testing system

Abstract

Keywords

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