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A novel experimental set-up for in-situ microstructural characterization during continuous strain path change
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Dhara, Sisir, Taylor, S., Figiel, Ł., Shollock, Barbara A. and Hazra, S. K. (2020) A novel experimental set-up for in-situ microstructural characterization during continuous strain path change. In: International Deep-Drawing Research Group (IDDRG 2020), Seoul, South Korea, 26-30 Oct 2020. Published in: IOP Conference Series: Materials Science and Engineering, 967 doi:10.1088/1757-899X/967/1/012007
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WRAP-novel-experimental-set-up in-situ-microstructural-stain-path-change-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution. Download (2699Kb) | Preview |
Official URL: https://doi.org/10.1088/1757-899X/967/1/012007
Abstract
Strain path change is a typical phenomenon during continuous stamping operations of sheet metal for a variety of applications including automotive body parts. During stamping, a punch continuously deforms a metal sheet to produce a desired geometry while following various strain path transitions depending on overall design of the stamping process. The strain path change can potentially alter the expected forming limit of the material. Previous researchers investigated the effect of changing strain path by loading sample in two distinct steps. Typically, between the steps the sample is unloaded before being re-loaded in the new strain path. This practice reflects the key challenge in elucidating this strain path dependent deformation, which is the ability to control the strain path change in a single deformation stage in an experimental set-up. In this work, a novel testing rig and specimen geometry that is capable of changing the strain path of a sample continuously without unloading the specimen were conceptualised, modelled and subsequently manufactured. Using this apparatus, the specimen was deformed in the uniaxial strain path in the first step before being deformed biaxially without unloading in between the steps. Thus, the apparatus ensures that the sample undergoes a continuous strain path change without unloading between the steps. The size of this mechanical test rig permits it to be placed inside a scanning electron microscope (SEM) chamber in order to study strain path transition in-situ to highlight strain localization and related microstructural changes in real time. Utilizing this test set-up, strain path change and corresponding strain values along each strain path were evaluated. The changes in material microstructure were concurrently investigated using in-situ SEM and electron back scattered diffraction (EBSD) analysis.
| Item Type: | Conference Item (Paper) | ||||||
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| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Finite element method , Strains and stresses , Sheet-metal work, Scanning electron microscopes , Electrons -- Backscattering , Metal stamping | ||||||
| Journal or Publication Title: | IOP Conference Series: Materials Science and Engineering | ||||||
| Publisher: | IOP Science | ||||||
| Official Date: | 2020 | ||||||
| Dates: |
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| Volume: | 967 | ||||||
| Article Number: | 012007 | ||||||
| DOI: | 10.1088/1757-899X/967/1/012007 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Copyright Holders: | IOP Conference Series: Materials Science and Engineering | ||||||
| Date of first compliant deposit: | 24 March 2021 | ||||||
| Date of first compliant Open Access: | 24 March 2021 | ||||||
| RIOXX Funder/Project Grant: |
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| Is Part Of: | 1 | ||||||
| Conference Paper Type: | Paper | ||||||
| Title of Event: | International Deep-Drawing Research Group (IDDRG 2020) | ||||||
| Type of Event: | Conference | ||||||
| Location of Event: | Seoul, South Korea | ||||||
| Date(s) of Event: | 26-30 Oct 2020 | ||||||
| Open Access Version: |
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