Simple tension (for R-1) Pure shear Major strain ( What is Forming Limit Diagram (FLD)? Explain how it is obtained. Below there is a FLD for several materials, using it compare the aluminum alloy and low carbon steel in terms of formability. 140 120 100 60 401 20 0 260 240 220 Plane strain Failure zone Safe zone 0 20 Minor strain (6) 40 60 80 Low-carbon steel Brass High-strength steel Aluminum alloy Equal (balanced) biaxial