Experimental and numerical investigation of V-bent anisotropic 304L SS sheet with spring-forward considering deformation-induced martensitic transformation
| Autor: | Bagher Mohammad Sadeghi, Masoud Ahmadi, Hossein Arabi |
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| Rok vydání: | 2017 |
| Předmět: |
Austenite
0209 industrial biotechnology Digital image correlation Materials science Mechanical Engineering Metallurgy Bent molecular geometry 02 engineering and technology Bending engineering.material 021001 nanoscience & nanotechnology Condensed Matter::Materials Science 020901 industrial engineering & automation Mechanics of Materials lcsh:TA401-492 engineering Physics::Accelerator Physics lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Texture (crystalline) Austenitic stainless steel Composite material Deformation (engineering) 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Materials & Design, Vol 123, Iss, Pp 211-222 (2017) |
| ISSN: | 0264-1275 |
| Popis: | Spring-back/forward phenomenon usually occurs during various kinds of bending tests of sheet metals. In this study, using a digital image correlation (DIC) technique coupled with uniaxial tensile test, mechanical properties of AISI 304L austenitic stainless steel were determined and the results were applied into finite element analysis (FEA) for further investigations. In order to examine various parameters affecting spring-forward in V-bending, a novel V-bending die equipped with data acquisition system was designed and used to perform V-bending tests of the AISI 304L stainless steel samples. For investigating crystallographic texture evolution in the bent sample, electron backscatter diffraction (EBSD) analysis was conducted. Furthermore, microstructural characterization, micro-hardness test and residual magnetic field measurement were utilized to investigate the transformation of austenite to α′-martensite in the bent samples. The results revealed that spring-forward angle raised by increasing sample thickness and lowering bending angle and anisotropy parameter. The fraction of transformed α′-martensite was affected by mode of deformation (stress state). An empirical model was suggested to relate residual magnetic field to volume fraction of α′-martensite for bent samples. In order to control the spring-forward efficiently, the contribution of microstructural evolution in V-bent samples was discussed. Keywords: 304L stainless steel, V-bending, Spring-forward, EBSD, α′-martensite |
| Databáze: | OpenAIRE |
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