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Effect of grain size on blank holder force of fine micro-blanking for Inconel 718 superalloy foils
JI Kaisheng, LIU Yanxiong, ZHOU Wangbiao, WU Mengfei, ZHANG Han, GONG Yucheng
download PDFAbstract. Regarding product miniaturization, there is a noticeable difference between micro-blanking and macro-blanking in terms of the quality of the parts and the metal deformation behavior. In this paper, fine micro-blanking simulations were conducted on Inconel 718 foils with a thickness of 100 μm and different grain size to investigate the effects of different blank holder force on the fracture length of blanking surface. The results showed that the empirical (macro) formula of blank holder cannot apply to fine micro-blanking. The fracture length gradually decreases with the increase of blank holder force. And as the grain growth, the blank holder force to obtain a micro-blanking surface with full burnish length and no fracture zone was smaller. Based on the effect of grain size and blank holder force, a revised empirical formula of blank holder force was established for fine micro-blanking. Then, the fine micro-blanking experiments of Inconel 718 superalloy foils were conducted to evaluate the feasibility for the revised empirical formula of blank holder force. This work may contribute to the selection of forming force for fine micro-blanking applications.
Keywords
Fine Micro-Blanking, Grain Size, Blank Holder Force, Revised Empirical Formula
Published online 9/15/2024, 8 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: JI Kaisheng, LIU Yanxiong, ZHOU Wangbiao, WU Mengfei, ZHANG Han, GONG Yucheng, Effect of grain size on blank holder force of fine micro-blanking for Inconel 718 superalloy foils, Materials Research Proceedings, Vol. 44, pp 233-240, 2024
DOI: https://doi.org/10.21741/9781644903254-26
The article was published as article 26 of the book Metal Forming 2024
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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