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  Effect of grain size on fatigue cracking at twin boundaries in a CoCrFeMnNi high-entropy alloy

Wang, A., An, X., Gu, J., Wang, X., Li, L., Li, W., et al. (2020). Effect of grain size on fatigue cracking at twin boundaries in a CoCrFeMnNi high-entropy alloy. Journal of Materials Science & Technology, 39, 1-6. doi:10.1016/j.jmst.2019.09.010.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-68DC-B Version Permalink: https://hdl.handle.net/21.11116/0000-0009-68E3-2
Genre: Journal Article

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 Creators:
Wang, A.G.1, Author
An, Xianghai1, Author
Gu, Ji2, Author
Wang, X.G.3, Author
Li, Linlin4, 5, Author           
Li, Weilin1, Author
Song, Min2, Author
Duan, Qiqiang3, Author
Zhang, Zhefeng3, Author
Liao, Xiaozhou1, Author
Affiliations:
1School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydne0y, Sydney, Australia, ou_persistent22              
2State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China, ou_persistent22              
3Materials Fatigue and Fracture Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China, ou_persistent22              
4High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672              
5Institute of Metal Research, Chinese Academy of Science, Wenhua Road 72, Shenyang, 110016, China, ou_persistent22              

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Free keywords: Chromium alloys; Cobalt alloys; Cracks; Entropy; Grain size and shape; High-entropy alloys; Iron alloys; Manganese alloys, Fatigue cracking; Grain size; Low cycle fatigues; Schmid factors; Slip band; Slip band spacing; Twin boundaries, Fatigue of materials
 Abstract: The fatigue cracking behavior at twin boundaries (TBs) in a CoCrFeMnNi high-entropy alloy with three different grain sizes was systematically investigated under low-cycle fatigue. Irrespective of grain size, the change from slip band cracking to TB cracking occurred with increasing the difference in the Schmid factors (DSF) between matrix and twin. However, the required critical DSF for the transition of the dominant cracking mode decreases with decreasing grain size due to the reduced slip band spacing that increases the impingement sites on the TBs and facilitates the coalescence of defects and voids to initiate TB cracks. © 2019

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Language(s): eng - English
 Dates: 2020-02
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jmst.2019.09.010
 Degree: -

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Title: Journal of Materials Science & Technology
  Other : J. Mater. Sci. Technol.
Source Genre: Journal
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Publ. Info: Shenyang, China : Editorial Board of Journal of Materials Science and Technology
Pages: - Volume / Issue: 39 Sequence Number: - Start / End Page: 1 - 6 Identifier: ISSN: 1005-0302
CoNE: https://pure.mpg.de/cone/journals/resource/954925584235