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Edge cracking and stretch-flangeability evaluation Optimised Hole Expansion Test (HET) An optimised HET methodology has been developed through the investigation of the main parameters affecting the hole expansion ratio (HE) such as clearance, tool wear, burr position and time from punch to expand. An experimental test configuration has been developed to objectively measure crack initiation…
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Edge-cracking in AA5754 H111 Automotive Spain Challenge Edge-cracking is a common issue in aluminium forming and the development of new alloys with a purer composition to improve edge cracking resistance is needed. A more recent version of AA 5754 alloy was produced at Aludium with purer chemical composition and a special manufacturing process to improve…
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