Cold Forming of Ni-Ti Shape Memory Alloy Sheet

4th International Conference on Advanced Engineering and Technology

Fann, Kaung-Jau^1 ; Su, Jhe-Yung^1

Department of Mechanical Engineering, National Chung Hsing University, Taichung

40227, Taiwan^1

关键词: Cold forming;    Experiment set-up;    Forming loads;    Material data;    NiTi shape memory alloys;    Process parameters;    Specific properties;    Spring-back;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/317/1/012079/pdf
DOI  :  10.1088/1757-899X/317/1/012079

来源: IOP

【 摘 要 】

Ni-Ti shape memory alloy has two specific properties, superelasiticity and shape memory effect, and thus is widely applied in diverse industries. To extend its further application, this study attempts to investigate the feasibility of cold forming its sheet blank especially under a bi-axial tensile stress state. Not only experiments but also a Finite Element Analysis (FEA) with DEFORM 2D was conducted in this study. The material data for FEA was accomplished by the tensile test. An Erichsen-like cupping test was performed as well to determine the process parameter for experiment setup. As a result of the study, the Ni-Ti shape memory alloy sheet has a low formability for cold forming and shows a relative large springback after releasing the forming load.