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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Stretch flanging behaviour and microstructural analysis of DP steel using punch stretching and incremental forming processes
https://orcid.org/http://orcid.org/0000-0001-8712-5786
The main aim of the present study is to analyse the stretch flanging behaviour of the DP steel sheet using the punch stretching (PS) and incremental sheet forming (ISF) at different temperatures. Firstly, the material properties and Lankford coefficients have been determined using uniaxial tension tests. Subsequently, the stretch flanging process has been carried out experimentally on the specimens with different flange widths and lengths using PS and ISF processes. Different critical formability and quality parameters, namely, strain path, thickness distribution, forming forces, and geometrical accuracy, have been analysed experimentally and numerically. The minimum flange thickness has been found near the edge of the bend region, which is deformed in the uniaxial tension region. The local contact of the tool with the sheet in the ISF process led to the decrement in the deformation force and further helped in increasing the form accuracy of stretch-flanged components. Due to the low stiffness at the bottom of the flange, higher spring-back has been observed for higher flange lengths. Additionally, microstructural characteristics of deformed specimens have been evaluated using EBSD studies. The misorientations developed during deformation in PS_400 °C condition are higher than in other conditions. Its spread towards higher angles (> 15°) caused more strain hardening in the material, leading to higher flanging forces than PS_RT. Finally, the surface roughness of the deformed specimen is correlated with the microstructure using Taylor factor maps.
Stretch flanging behaviour and microstructural analysis of DP steel using punch stretching and incremental forming processes
https://orcid.org/http://orcid.org/0000-0001-8712-5786
The main aim of the present study is to analyse the stretch flanging behaviour of the DP steel sheet using the punch stretching (PS) and incremental sheet forming (ISF) at different temperatures. Firstly, the material properties and Lankford coefficients have been determined using uniaxial tension tests. Subsequently, the stretch flanging process has been carried out experimentally on the specimens with different flange widths and lengths using PS and ISF processes. Different critical formability and quality parameters, namely, strain path, thickness distribution, forming forces, and geometrical accuracy, have been analysed experimentally and numerically. The minimum flange thickness has been found near the edge of the bend region, which is deformed in the uniaxial tension region. The local contact of the tool with the sheet in the ISF process led to the decrement in the deformation force and further helped in increasing the form accuracy of stretch-flanged components. Due to the low stiffness at the bottom of the flange, higher spring-back has been observed for higher flange lengths. Additionally, microstructural characteristics of deformed specimens have been evaluated using EBSD studies. The misorientations developed during deformation in PS_400 °C condition are higher than in other conditions. Its spread towards higher angles (> 15°) caused more strain hardening in the material, leading to higher flanging forces than PS_RT. Finally, the surface roughness of the deformed specimen is correlated with the microstructure using Taylor factor maps.
Stretch flanging behaviour and microstructural analysis of DP steel using punch stretching and incremental forming processes
https://orcid.org/http://orcid.org/0000-0001-8712-5786
The main aim of the present study is to analyse the stretch flanging behaviour of the DP steel sheet using the punch stretching (PS) and incremental sheet forming (ISF) at different temperatures. Firstly, the material properties and Lankford coefficients have been determined using uniaxial tension tests. Subsequently, the stretch flanging process has been carried out experimentally on the specimens with different flange widths and lengths using PS and ISF processes. Different critical formability and quality parameters, namely, strain path, thickness distribution, forming forces, and geometrical accuracy, have been analysed experimentally and numerically. The minimum flange thickness has been found near the edge of the bend region, which is deformed in the uniaxial tension region. The local contact of the tool with the sheet in the ISF process led to the decrement in the deformation force and further helped in increasing the form accuracy of stretch-flanged components. Due to the low stiffness at the bottom of the flange, higher spring-back has been observed for higher flange lengths. Additionally, microstructural characteristics of deformed specimens have been evaluated using EBSD studies. The misorientations developed during deformation in PS_400 °C condition are higher than in other conditions. Its spread towards higher angles (> 15°) caused more strain hardening in the material, leading to higher flanging forces than PS_RT. Finally, the surface roughness of the deformed specimen is correlated with the microstructure using Taylor factor maps.
Stretch flanging behaviour and microstructural analysis of DP steel using punch stretching and incremental forming processes
Archiv.Civ.Mech.Eng
Pandre, Sandeep (Autor:in) / Morchhale, Ayush (Autor:in) / Kotkunde, Nitin (Autor:in) / Suresh, Kurra (Autor:in) / Singh, Swadesh Kumar (Autor:in)
16.07.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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