| 摘要 |
A precipitation hardened structural assembly is provided, including a first structural member (24a) and a second structural member (24b) positioned adjacent to the first structural member (24a) such that the first and second structural members (24a, b) define an interface (32) therebetween. At least one friction stir weld joint (28) joins the first structural member (24a) to the second structural member (24b) at least partially along the interface (32). The first and second structural members (24a, b) and the friction stir weld joint (28) are solution heat treated at a first predetermined temperature schedule and precipitation heat treated at a second predetermined temperature schedule and wherein the friction stir weld joint (28) comprises a refined grain structure having grain size of less than about 5 microns. |
