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Extraordinary Deformation Modes in Ni-Base Superalloy CM247LC at Room Temperature

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Abstract

After tensile deformation at room temperature and a strain rate of 3.0 × 10−4 s−1, microstructures of [001]-oriented single crystal Ni-base superalloy CM247LC are characterized by transmission electron microscopy. We found that besides pairs of a/2〈110〉 dislocations, shearing of γ′ precipitates by single a/6〈112〉 partial dislocations accompanied by the formation of Shockley dislocation loops, isolated stacking faults and extended stacking faults as well as microtwinning also occur in the alloy at the very beginning of plastic deformation.

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This work was financially supported by Young Elite Scientists Sponsorship Program by CSEE (Grant Number JLB-2020-165), State Key Laboratory for Mechanical Behavior of Materials (Grant Number 20192109), and the Science & Technology Foundation of Huaneng Group Co, Ltd. (Grant Number TA-20-HJK03, TA-20-TYK03).

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Authors and Affiliations

  1. Xi’an Thermal Power Research Institute Co., Ltd., 136 Xingqing Road, Xi’an, 710032, China

    P. Zhang, Y. Yuan, J. B. Yan, J. T. Lu & Y. F. Gu

  2. Xi’an Superalloy Technologies Co., Ltd., 22 Jingwei Road, Xi’an, 710201, China

    X. B. Shi

  3. Instrumental Analysis Center, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, 710049, China

    J. Li

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  1. P. Zhang
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Manuscript submitted March 26, 2021; accepted June 23, 2021.

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Zhang, P., Yuan, Y., Shi, X.B. et al. Extraordinary Deformation Modes in Ni-Base Superalloy CM247LC at Room Temperature. Metall Mater Trans A 52, 3699–3705 (2021). https://doi.org/10.1007/s11661-021-06370-x

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