Springback comparison between DP600 and DP800 steel grades

A comparative study of the springback effect, otherwise known as elastic return, on Dual Phase DP600 and DP800 steel sheets is reported herein, which have been widely used in the automotive industry due to having good mechanical properties, such as high strength and ductility if compared to conventi...

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Bibliographic Details
Published in:Materials research express 2020-01, Vol.7 (1), p.16598
Main Authors: Almeida, Christyane Oliveira Leão, Lima, Luís Henrique Lopes, dos Santos Pereira, Marcelo
Format: Article
Language:English
Subjects:
Anisotropy
Automobile industry
Bend tests
Comparative studies
Diamond pyramid hardness
DP 600
DP 800
Dual phase steels
Energy absorption
Forming
Greenhouse gases
high strength steel
Impact strength
Mechanical properties
Metal sheets
Parameters
Springback
Steel
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Summary:A comparative study of the springback effect, otherwise known as elastic return, on Dual Phase DP600 and DP800 steel sheets is reported herein, which have been widely used in the automotive industry due to having good mechanical properties, such as high strength and ductility if compared to conventional steels. For such a purpose, it is proposed to analyze whether anisotropy and varying forming parameters interfere with the springback effect or not. The parameters selected to compare DP600 with DP800 dual phase steels were descending speed of 4 mm min−1 along the vertical axis of sheets until reaching internal bending angle of 30 degrees during bending tests at two rolling angles (0 and 90 degrees), thus forming a U-shaped steel sheet. In addition to bending tests, tensile tensting and Vickers microhardness tests have been performed at three rolling angles (0, 45 and 90 degrees). It was concluded that punching rate, internal bending angle, observation time and rolling angle exert an influence on the springback effect. Thereby, there is an important contribution to areas that require quality in formability, such as vehicle structure, which must have high impact strength and energy absorption. Steel sheets with increasingly smaller thicknesses are able to reduce density, product cost and greenhouse gases emissions from automobiles.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ab664e