Development of a Nakazima formability test methodology for high temperature applications on titanium alloys sheet metal

Abstract

Abstract Forming Limit Curves (FLCs) in applications of hard-to-form materials results essential to optimise the complex forming processes involved. The need of applying high temperature in most of these applications increases the importance of FLCs for cost-effective procedure designs. Nevertheless, either a lack of knowledge is detected relative to this field in literature, or the experimental methods proposed to obtain FLCs result complex to be executed. In the present work, an easy-to-use methodology based on the traditional Nakazima test is proposed and the research has been applied to different titanium alloys. For that, a heated Nakazima device was developed and some new geometry for test samples was proposed. The results agree with those obtained by other authors in similar conditions, what validates the approach developed herein.