The deformation behavior and texture evolution during forming of an advanced high-strength steel (DP600 grade) were characterized. The deformation history of DP600 during electro-hydraulic forming (EHF) was quantified using a unique experimental capability developed at PNNL. The texture evolution during quasi-static and high-strain-rate deformation was determined using the electron backscatter diffraction (EBSD) technique. The deformation history of EHF formed steel sheets shows an amplification of the strain-rate, relative to free-forming conditions, when the forming was carried out inside a conical-die. This strain-rate amplification was attributed to the focusing action of the conical die. The undeformed DP600 sheet was found to possess a {111} fiber texture in the sheet-normal direction. Quasi-static deformation was found to strengthen the pre-existing texture whereas high-rate forming using EHF had a lesser influence. The results of this work demonstrate the unique capability to correlate deformation history during high-strain-rate metal forming processes with the corresponding microstructural evolution. It is expected that results of this work can help fill-in the gaps in our understanding of high-rate forming processes, leading to development of accurate and validated numerical models.
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ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing
June 4–8, 2012
Notre Dame, Indiana, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5499-0
PROCEEDINGS PAPER
Electro-Hydraulic Forming of Advanced High-Strength Steels: Deformation and Microstructural Characterization
Aashish Rohatgi,
Aashish Rohatgi
Pacific Northwest National Laboratory, Richland, WA
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Elizabeth V. Stephens,
Elizabeth V. Stephens
Pacific Northwest National Laboratory, Richland, WA
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Danny J. Edwards,
Danny J. Edwards
Pacific Northwest National Laboratory, Richland, WA
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Mark T. Smith,
Mark T. Smith
Pacific Northwest National Laboratory, Richland, WA
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Richard W. Davies
Richard W. Davies
Pacific Northwest National Laboratory, Richland, WA
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Aashish Rohatgi
Pacific Northwest National Laboratory, Richland, WA
Elizabeth V. Stephens
Pacific Northwest National Laboratory, Richland, WA
Danny J. Edwards
Pacific Northwest National Laboratory, Richland, WA
Mark T. Smith
Pacific Northwest National Laboratory, Richland, WA
Richard W. Davies
Pacific Northwest National Laboratory, Richland, WA
Paper No:
MSEC2012-7322, pp. 163-168; 6 pages
Published Online:
July 19, 2013
Citation
Rohatgi, A, Stephens, EV, Edwards, DJ, Smith, MT, & Davies, RW. "Electro-Hydraulic Forming of Advanced High-Strength Steels: Deformation and Microstructural Characterization." Proceedings of the ASME 2012 International Manufacturing Science and Engineering Conference collocated with the 40th North American Manufacturing Research Conference and in participation with the International Conference on Tribology Materials and Processing. ASME 2012 International Manufacturing Science and Engineering Conference. Notre Dame, Indiana, USA. June 4–8, 2012. pp. 163-168. ASME. https://doi.org/10.1115/MSEC2012-7322
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