2004-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/676350摘要：Ti-6Al-4V是屬於一種α-β鈦合金，可經由適當的熱處理而強化。由於具有優異的銲接及成形性，使其成為一種非常重要的鈦合金。鉬(Mo)和鈮(Nb)這兩種金屬均屬於具有高熔點的難熔金屬，故有良好的高溫強度。在實際的工程應用中，將可能遭遇到此類異種材料間之接合問題(例如：製作火箭的燃燒室)。本研究主要目的在於以真空硬銲製程(包含傳統真空硬銲及紅外線硬銲)，分別接合Ti-6Al-4V及上述兩種難熔金屬(TZM合金及鈮金屬)。本計劃亦將針對上述硬銲接點內，所生成的介金屬化合物之種類與成長動力學進行研究。配合ABAQUS電腦模擬試片分別經硬銲製程、剪力測試及熱疲勞測試後，接合界面之殘餘熱應力分佈及累計塑性應變(包含潛應變)的估算，將有助於瞭解硬銲接點的破壞機構。期望能夠藉由本研究發展出上述兩種材料組合之最佳真空硬銲製程參數。<br> Abstract: Ti-6Al-4V is a type of α-β titanium, which can be strengthened by the appropriate heat treatment. It is a very important titanium alloy due to its excellent weldability and formability. Both Mo and Nb are categorized as refractory metals with high melting points, so they possess good strength at elevated temperatures. The bonding of these dissimilar metals can be encountered in practical engineering applications, e.g. the manufacturing of missile combustion chambers. The purpose of this research is focused in vacuum brazing, including traditional vacuum brazing and infrared brazing, Ti and the above two refractory metals (TZM alloy and Nb) in the period of three years. In the first year, the project concentrates on vacuum brazing of Ti-6Al-4V and TZM alloy, and the silver-based braze alloys are selected as brazing fillers. The formation of a gas-tight joint between Ti-6Al-4V and TZM is the primary goal at this stage. In the second year, the project mainly concentrates on vacuum brazing of Ti-6Al-4V and the Nb metal, and the silver-based braze alloys are also selected as brazing fillers. It is expected that the optimized vacuum brazing process variables can be developed in the study.真空硬銲鈦合金難熔金屬界面熱疲勞vacuum brazingtitanium alloysrefractory metalsinterfacethermal fatigue