Optimized Tension for AZ31B Thin Sheets Rolled with On-Line Heating Rolling
- PDF / 10,781,609 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 61 Downloads / 179 Views
Optimized Tension for AZ31B Thin Sheets Rolled with On‑Line Heating Rolling Biquan Xiao1,2 · Jiangfeng Song1,2 · Hua Zhao1,2 · Aitao Tang1,2 · Qiang Liu1,2 · Bin Jiang1,2 · Shitao Dou3 · Fusheng Pan1,2 Received: 22 June 2020 / Revised: 17 July 2020 / Accepted: 18 August 2020 © The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract On-line heating rolling mill which could efficiently preheat sheet and apply tensile force on both ends of the sheet along rolling direction (RD) was used to investigate the effect of tension on mechanical behavior and shape quality of magnesium sheets. For revealing the influence mechanism, many analysis techniques including optical microscope, electron backscattered diffraction, macrotexture and transmission electron microscope were performed. The shape defect, edge wave, could be eliminated under higher tension along RD, which was attributed to more uniform distribution of microstructure and microstrain. Nevertheless, it is undesirable that the forward tensile force exceeds 3 kN in present work because the strength decreased for high recrystallization level when the tensile force is beyond this value. Furthermore, the main deformation mode was still slip during rolling process despite of accompanying twining, e.g., double twins, but more prismatic slip activated when tensile force exceeds 3 kN. The distribution of shear bands was affected by the applied tensile force that they appear as “V” shape along RD at a low forward or backward tensile force, while they appear as reticulate shape under applied tensile force of 5 kN. Keywords Magnesium · Tension · On-line heating rolling · Mechanical behavior · Shape quality
1 Introduction Magnesium alloys have great potential in biomedical applications and 3C industries for its excellent biocompatibility, heat dissipation and high specific strength [1–4]. In addition, in the field of Mg ion batteries, magnesium is also an ideal battery anode material because of its high volumetric energy density [5]. In these fields, thin magnesium and magnesium Available online at http://link.springer.com/journal/40195. * Jiangfeng Song [email protected] * Fusheng Pan [email protected] 1
State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2
National Engineering Research Center for Magnesium Alloy, Chongqing University, Chongqing 400044, China
3
Southwest Technology and Engineering Research Institute, Chongqing 400039, China
alloy sheets are in need. For example, the magnesium alloy foils in the rechargeable magnesium ion battery application are required to be about 100 μm [6]. Rolling is a promising method to produce thin sheets and foils. Unfortunately, the rolled sheets are susceptible to some shape defects such as edge-wave or center-wave [7] and the formability of magnesium alloy is relatively poor. So, there is a challenge in getting a thin magnesium sheet and foil with high quality. Gener
Data Loading...
