Probably the only way you will maintain such a shape without spring-back, is to build a constraint fixture and anneal it while in the fully-contrained condition (fastened in the fixture). This will eliminate/reduce the stresses in the material and it will hold it's shape when you remove it from the fixture. I worked on a contract that required this exact operation for large radial-shaped aluminum panels that had a VERY TIGHT tolerance on the contour. Hope this helps!! |