| 摘要 |
Processes for fabricating components (10) to have two or more regions (12,14) with different grain structures, and components (10) produced by such processes. First and second preforms (22,24;42,44) are fabricated to comprise interface surfaces (28,48) at which the preforms (22,24;42,44) can be joined together. The first and second preforms (22,24;42,44) are formed of first and second precipitation-strengthened alloys, respectively, and the first alloy differs from the second alloy by having a higher solvus temperature or a higher grain refiner content. The preforms (22,24;42,44) are joined together to form an article (30,50) comprising first and second portions (32,34;52,54) formed by the first and second preforms (22,24;42,44), respectively, and corresponding to first and second regions (12,14) of the component (10), respectively, and the interface surfaces (28,48) of the preforms (22,24;42,44) form a joint (38,58) between the first and second portions (32,34;52,54) of the article (30,50). A supersolvus heat treatment is performed on the article (30,50) so that greater grain growth occurs in the second portion (34,54) than in the first portion (32,52). |
