Improving Hole Expansion Ratio by Parameter Adjustment in Abrasive Water Jet Operations for DP800

authored by: Bernd Arno Behrens, David Diaz-Infante, Taylan Altan, Deniz Yilkiran, Kai Wölki, Sven Hübner
Abstract: The use of Abrasive Water Jet (AWJ) cutting technology can improve the edge stretchability in sheet metal forming. The advances in technology have allowed significant increases in working speeds and pressures, reducing the AWJ operation cost. The main objective of this work was to determine the effect of selected AWJ cutting parameters on the Hole Expansion Ratio (HER) for a DP800 (Dual-Phase) Advanced High-Strength Steel (AHSS) with s₀ = 1.2 mm by using a fractional factorial design of experiments for the Hole Expansion Tests (HET). Additionally, the surface roughness and residual stresses were measured on the holes looking for a possible relation between them and the measured HER. A deep drawing quality steel DC06 with s₀ = 1.0 mm was used for reference. The fracture occurrence was captured by high-speed cameras and by Acoustic Emissions (AE) in order to compare both methods. Results indicated that using, regardless of the material, a small standoff distance, high water pressure, and slow traverse speed and cutting the sample underwater will delay the fracture in a hole expansion operation. Furthermore, the AE have proven to be adequate to measure cracks when optical methods are not feasible. In conclusion, based on the impact of the aforementioned parameters, it is possible to select, appropriately, the AWJ operation parameters to achieve the edge stretchability required for each forming process.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): The Ohio State University
Type: Article
Journal: SAE International Journal of Materials and Manufacturing
Volume: 11
Pages: 241-252
No. of pages: 12
ISSN: 1946-3979
Publication date: 17.09.2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanics of Materials, Mechanical Engineering, Industrial and Manufacturing Engineering
Electronic version(s): https://doi.org/10.4271/05-11-03-0023 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@article{4d3e02efe5044da08baed2426a4a7475,
title = "Improving Hole Expansion Ratio by Parameter Adjustment in Abrasive Water Jet Operations for DP800",
abstract = "The use of Abrasive Water Jet (AWJ) cutting technology can improve the edge stretchability in sheet metal forming. The advances in technology have allowed significant increases in working speeds and pressures, reducing the AWJ operation cost. The main objective of this work was to determine the effect of selected AWJ cutting parameters on the Hole Expansion Ratio (HER) for a DP800 (Dual-Phase) Advanced High-Strength Steel (AHSS) with s0 = 1.2 mm by using a fractional factorial design of experiments for the Hole Expansion Tests (HET). Additionally, the surface roughness and residual stresses were measured on the holes looking for a possible relation between them and the measured HER. A deep drawing quality steel DC06 with s0 = 1.0 mm was used for reference. The fracture occurrence was captured by high-speed cameras and by Acoustic Emissions (AE) in order to compare both methods. Results indicated that using, regardless of the material, a small standoff distance, high water pressure, and slow traverse speed and cutting the sample underwater will delay the fracture in a hole expansion operation. Furthermore, the AE have proven to be adequate to measure cracks when optical methods are not feasible. In conclusion, based on the impact of the aforementioned parameters, it is possible to select, appropriately, the AWJ operation parameters to achieve the edge stretchability required for each forming process.",
keywords = "Abrasive water jet, Advanced high-strength steel, Blanking, Hole expansion test, Metal forming",
author = "Behrens, {Bernd Arno} and David Diaz-Infante and Taylan Altan and Deniz Yilkiran and Kai W{\"o}lki and Sven H{\"u}bner",
note = "Funding information: The presented work is a result of the project “Acoustic emission analysis for online monitoring in sheet metal forming,” project number BE 1691/183-1, granted by the German Research Foundation (DFG). The authors are thankful for the financial support. Additionally, the authors would like to thank to the Institute of Forming Technology and Machines (IFUM), Leibniz Universit{\"a}t Hannover, for hosting a guest researcher and allowing him to conduct the experiments at their facilities during a scientific exchange as an international collaboration with the Center for Precision Forming at The Ohio State University.",
year = "2018",
month = sep,
day = "17",
doi = "10.4271/05-11-03-0023",
language = "English",
volume = "11",
pages = "241--252",
journal = "SAE International Journal of Materials and Manufacturing",
issn = "1946-3979",
publisher = "SAE International",
number = "3",
}