Determining biaxial tensile stresses by fracture cruciform specimen at different temperatures and strain rates for Ti–6Al–4V alloy

Experimental studies of necking and fracture limits of boron steel sheet under hot stamping conditions

“…This biaxial test method was validated by comparing the necking limits obtained with this method against those obtained using the standard Nakajima method (Zhang et al, 2021c). One of the challenges when applying this biaxial method to the formability assessment of boron steel at hot stamping temperatures is reproducing the heat-treatment histories used in industrial hot stamping processes (Farhadzadeh et al, 2018). In their previous study, Shao et al (2016) demonstrated that heating the cruciform specimens using a direct resistance heating system in a Gleeble thermal-mechanical simulator before and during stretching using the patented biaxial rig allowed industrially relevant thermomechanical cycles to be replicated.…”

A Combined Experimental and Numerical Calibration Approach for Modeling the Performance of Aerospace-Grade Titanium Alloy Products

“…However, the effective prediction of the mechanical behavior of materials and design of mechanical components subjected to different strain rate and various temperatures is generally performed with the Johnson-Cook (JC) model [18]. The Johnson-Cook plasticity law is used for the design of mechanical components subjected to impact loading [6,19,20], to several strain rates and various temperatures [21], for predicting the response of a material during machining [22,23], for forming processes [24][25][26] and surface treatments [27,28]. The effects of strain hardening, strain rate sensitivity, and thermal softening are incorporated as a product for the stress response computation.…”