Effect of Cold‐Rolling Deformation on Texture Evolution and Tensile Properties of Titanium Foil for Hydrogen Fuel Cell

Abstract

Preparation of a titanium foil with weak anisotropy is of great significance for the development of bipolar plate materials for hydrogen fuel cell. However, the titanium foil obtained by rolling deformation often suffer from a severe deformation anisotropy due to the formation of a specific texture feature. In this study, the texture feature of pure titanium foil with different cold‐rolling reduction was characterized by EBSD, and the effect of cold‐rolling deformation on texture evolution and tensile properties of titanium foil were systematically investigated. The results have shown that the cold‐rolling reduction could significantly affect the tensile anisotropy of titanium foil by regulating the texture characteristics. At the low level of cold‐rolling reductions (0‐30%), the texture of titanium foil is mainly pyramid texture, causing the obvious tensile anisotropy. At the medium level of cold‐rolling reductions (50%), strong basal‐plane texture components were appeared, causing that the activated slip system along TD or ND is almost the same, and thus the tensile anisotropy gradually diminished. At the high level of cold‐rolling reductions (70%), the intensity of basal‐plane texture become weak, and the tensile anisotropy appears in titanium foil again. Our findings could provide theoretical guidance and technical support for the preparation of weak anisotropic titanium foil for hydrogen fuel cell.This article is protected by copyright. All rights reserved.