超塑性合金之特性及其應用

Developments and Industrial Applications of Superplastic Alloys

張吉本(Chi-BenChang)

《鍛造》 11卷1期 (2002/06) Pp. 6-21

摘要

超塑性合金如鈦合金、高強度鋁合金等，因為具有重量輕、比強度大及耐熱性佳等特性，對於航太工業深具吸引力。由於超塑性合金材料可高度變形，工件能以高達200%的塑性應變來設計，如此可製造非常複雜的工件，並能永遠維持其變形後之形狀。
超塑性成型能提供傳統金屬成型方法所沒有之優點，此成型製程與擴散接合、硬銲等特殊接合技術相結合，則可將傳統複雜組件改為一體成型，而明顯降低組件的重量與成本。

並列摘要

Superplastic titanium and high-strength aluminium alloys in sheet form have many attractions for the aerospace industry, due to their high strengh, low density, and heat resistance. The materials are capable of high deformation up to 200% plastic st5rain, which permits the fabrication of very complicated parts and maintains this permanent stretch. Superplastic forming can offer several advantages over these conventional sheet metal part forming methods. Combined with advanced joining methods such as diffusion bonding and weld brazing, the forming process can allow the fabrication of complex monolithic structures, that were not only more cost competitive, but also often more structurally efficient.