New Challenges on Developing Experimental Methods for Innovative Metal Forming Techniques

Abstract

For industrial applications of innovative metal forming techniques, advanced experimental methods have been developed to characterize the mechanical properties of materials under the corresponding forming conditions. This paper focuses on uniaxial tensile tests for the characterization of the thermomechanical behavior of materials and biaxial tensile tests for the evaluation of the material formability under hot-stamping conditions; these test methods have been improved in recent years. Applications of both the uniaxial and biaxial tensile tests to a boron steel sheet are presented, and the associated experimental results are analyzed. Importantly, new challenges encountered in the development of these experimental methods are discussed and summarized. This paper concludes that more efforts are needed for the standardization of these experimental methods in future.

Keywords

• hot-stamping
• uniaxial tensile test
• biaxial tensile test
• cruciform specimen
• thermomechanical behavior
• formability