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Microstructure characteristics of the serrated groove formed by inner spinning on the high temperature alloy tube
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Key Lab of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University

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Natural Science Foundation of Liaoning Province, China (No. 201602558), Liaoning Provincial Department of Education Fund (No. L201748), Open Foundation of Key Lab of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process (No. SHSYS2017001)

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    Abstract:

    A large-diameter thin-walled high temperature alloy tube with serrated groove is produced by inner spinning whose blank is welded up, and the micro-hardness and microstructure characteristics of the serrated groove in the tube are investigated. The welding results in coarse and uneven dendrites in the as-welded joint, which leads to larger the micro-hardness difference between the as-welded joint and the out of -welded joint zone. Both the original grains from the outer of the welded joint zone and the dendrites of the as-welded joint are refined by the inner spinning on the serrated groove. The micro-mechanical property unevenness of the serrated groove is significantly improved by severe plastic deformation.

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[Z. Jia, M. Wang, Z. R. Han, Z. J. Fan, J. H. Cong. Microstructure characteristics of the serrated groove formed by inner spinning on the high temperature alloy tube[J]. Rare Metal Materials and Engineering,2019,48(5):1401~1405.]
DOI:10.12442/j. issn.1002-185X.20180159

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History
  • Received:February 14,2018
  • Revised:April 12,2019
  • Adopted:April 04,2018
  • Online: June 04,2019
  • Published: