Local Hardness Recovery in the Heat-Affected Zone of Laser Beam Weld Seams in AlMgSi-Alloys with an In-Process Laser Post-heat Treatment. Proceedings of the 40th International Congress on Applications of Lasers & Electro-Optics (ICALEO 2021), (303)Laser Institute of America, October 2021. [PUMA: post-heat from:fraukefaure myown aluminum laser treatment]