Influence of different rolling routes on mechanical anisotropy and formability of commercially pure titanium sheet
(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 Alloys，Chongqing University, Chongqing 400044, China;
3. Chongqing Research Center for Advanced Materials, Chongqing Academy of Science & Technology, Chongqing 401123, China)
2. National Engineering Research Center for Magnesium Alloys，Chongqing University, Chongqing 400044, China;
3. Chongqing Research Center for Advanced Materials, Chongqing Academy of Science & Technology, Chongqing 401123, China)
Abstract: Influence of three different rolling routes on mechanical anisotropy and formability of commercially pure titanium sheet was investigated. Route A and Route B are unidirectional rolling (UR) where the rolling direction is along initial rolling direction (RD) and transverse direction (TD), respectively. Route C is cross rolling (CR) where the rolling direction is changed by 90° after each rolling pass. The microstructure and texture, tensile mechanical properties including strength and elongation, and also the anisotropy of the UR and CR sheets were investigated at room temperature. The XRD results indicate that the texture intensity of rolled samples gradually weakens from Route A to Route C. Compared with Route A and Route B rolled samples, the Route C rolled samples show a smaller planar anisotropy. The deep drawing tests reveal that cross rolling can avoid the occurrence of earing. Erichsen tests indicate that rolling routes have an effect on stretch formability of pure titanium sheet.
Key words: CP-Ti; cross rolling; anisotropy; texture; deep drawing