Micro incremental forming of thin SS304 foils and its microstructural study

Abstract Micro-forming of thin foils is challenging due to the size effect, friction and tool design. The conventional macro-forming techniques cannot be directly applied foils. incremental forming process (ISF) can used for since it possesses higher formability compared process. Hence, µ-ISF (micro process) experiments were conducted on SS304 stainless steel having 50, 100, 200 µm thickness. As-received further annealed at 950°C with a holding time 20 mins achieve strain-free microstructure. Taguchi L18 orthogonal was optimize initial processing parameters for, experiments. Using optimized performed all thickness sheets up maximum wall angle. It observed that diameter lower step depth give minimum roughness value in deformed sheet. tearing mode failure formation strain-induced martensite microstructure bulk texture analysis relate orientation twin fraction deformation behaviour. From evolution, brass {110} <112>, Cube {100} <001>, goss <001> component has greater influence