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 Engineering and Technology (Jul 2020)

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

Affiliations

Yang Zhong: Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
Kuan-Che Lan: Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
Hoon Lee: Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
Bomou Zhou: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China
Yong Wang: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China
D.K.L. Tsang: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China; Corresponding author.
James F. Stubbins: Department of Nuclear, Plasma, and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA; Corresponding author.

Journal volume & issue: Vol. 52, no. 7
pp. 1481 – 1485

Abstract

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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.

Published in Nuclear Engineering and Technology

ISSN: 1738-5733 (Print)
Publisher: Elsevier
Country of publisher: Korea, Republic of
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-engineering-and-technology

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