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Metals and Materials International

, Volume 25, Issue 5, pp 1378–1387 | Cite as

Effect of Microstructure and Texture Evolution During Variable Gauge Rolling on Mechanical Properties of Tailor Rolled Blanks

  • E. ShafieiEmail author
  • K. Dehghani
  • F. Ostovan
  • Meysam Toozandehjani
Article
  • 57 Downloads

Abstract

In this study, anisotropic elastic and plastic mechanical properties of a tailor rolled blank (TRB) with thickness ratio of 0.52 (1 mm/1.9 mm), have been fully studied. To gain a deeper insight into anisotropic mechanical behavior of the studied TRB, continuous changes in microstructure and crystallographic texture of a dual phase steel caused by variable gauge rolling (VGR) were investigated on several points (on RD–ND plane) along longitudinal direction with the aid of EBSD observations. Analysis of grain boundary (GB) maps revealed that ferrite grain refinement is occurred during VGR so that the average ferrite grain size decreases from 4.1 µm for the thicker side to 2.2 µm for the thinner side. Furthermore, it was found out that substructure density is more intense within smaller ferrite grains. Evaluation of inverse pole figures as well as orientation distribution function maps showed that texture of thicker side comprises {001}〈110〉 and {112}〈110〉 components along \( \alpha \)-fiber. In addition, it was revealed that orientations of {111}〈110〉 and {111}〈112〉 along \( \gamma \)-fiber strengthen along VGR direction by further increase in thickness reduction near thinner side. Accordingly, unprecedented gradual changes in mechanical properties with respect to these changes in microstructure and texture, were obtained. Finally, the correlation between in-plane anisotropic mechanical properties [Young’s modulus (E), yield stress (YS), ultimate tensile stress (UTS) and total elongation] of the studied tailor rolled blank with microstructure and deformation texture was interpreted.

Keywords

Tailor rolled blank TRB Texture Rolling Dual phase EBSD 

Notes

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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringIslamic Azad University, Bandarabbas BranchBandarabbasIran
  2. 2.Department of Mining and Metallurgical EngineeringAmirkabir University of TechnologyTehranIran
  3. 3.Razak Faculty of Technology and InformaticsUniversiti Teknologi MalaysiaKuala LumpurMalaysia

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